RealHighway (RHW) Features

The RealHighway (RHW) system is a series of new highway networks added by the NAM, based on the reactivated stub of an unfinished transportation network (originally intended as a "DirtRoad" network) that Maxis left in the game. It is a variable width, variable height system with extensive modular interchange construction capabilities.

rhwteaser1 rhwteaser2 rhwteaser3 rhwteaser4

 Table of Contents

 Installing the RealHighways from the NAM Installer

A mostly complete install (missing the upper elevated heights) of the RealHighway plugin is one of the features included by default if one selects the "Complete Standard Installation" or "Networks and Traffic Simulator" options in the NAM Installer. In Custom Installation, there is a whole section dedicated to the RealHighways and related optional features.

In Custom Installation, under the "2 Additional Network Features" section, selecting the "RealHighway" box will install the mod in its entirety. Deselecting any of the other boxes under this section should only be done by advanced users who are manually compiling a NAM Controller to exclude certain RHW networks.

Note that the RHW requires a 4GB_Full NAM Controller, and as such, also requires the 4GB Patch. It is the largest component in the NAM package by a wide margin, and requires a 64-bit operating system and at least 4GB RAM to utilize.

Euro textures for the RealHighways will be automatically installed if one selects one of the Euro road texture options. (Note that MandelSoft's older Euro texture options have been discontinued, as they are no longer being maintained.)

 RealHighway Base and Override Networks

The RealHighway system avails itself of the only unfinished network stub left in the game, and adds a true base network, the 2-lane RealHighway (RHW-2), along with 33 override networks based upon it. With the exception of the Modular Interchange System (MIS) Ramp override network, the nomenclature used for RealHighway networks distinguishes the networks by the total number of lanes it would require to facilitate two-way traffic with the network. For instance, while each individual tile of the 4-lane RealHighway (RHW-4) may only carry 2 lanes going in one direction, full bidirectional traffic with the network would require 2 stretches of the network traveling in opposite directions, thereby resulting in a total of 4 lanes.

With some of the wider networks, the letters "S" or "C" may be added after the lane count designation (i.e. RHW-8S or RHW-6C). The "S" is an indication for "separable", meaning that the lanes carrying travel in the opposite direction may be separated by any distance. The "C" stands for "combined", and the center tile of the "C" override carries the median separating the two directions of traffic, thereby making it inseparable. While the smaller networks do not have "S" or "C" suffixes, the RHW-2 and RHW-3 may be thought of as small C-type networks, and the MIS Ramp and RHW-4 as S-type networks.

It is also possible to make ad hoc asymmetrical networks as well. For instance, one could create a 5-lane highway by using the RHW-4 on one side, and an RHW-6S on the other. The C-type networks, while not separable, also support this sort of functionality, and a dedicated starter exists for an "RHW-7C", which uses parts of the RHW-8C and RHW-6C for construction.

There are also multiple elevation levels for the RealHighway override networks as well, and a simple shorthand system of denoting each level. Ground-level networks, by virtue of having no elevation above the terrain, are deemed to be "Level 0", or L0. The RealHighway levels increment by 7.5 meters (7.5m) each level. Level 1 (L1) is at 7.5 meters, Level 2 (L2) at 15 meters, Level 3 (L3) at 22.5 meters, and Level 4 (L4) at 30 meters. All RealHighway widths have L1 and L2 elevation at their disposal, and the MIS Ramp, RHW-4, and RHW-6S all have the ability to reach L3 and L4. Double-decker (DD) setups also exist (presently, only in a configuration with 4 total lanes, the DDRHW-4), and the upper deck of the DDRHW is at L2, while the lower deck is at L1.

The base draggable network can be found under the RHW-2 button.

RHW-2 Button RHW-2 Network Button

The Starter Pieces can be found under the RHW Starters button.

RHW Starters Button RHW Starters Button

Network Widths
NetworkFull NameTile Width
RHW-22-lane RealHighway1 (Two-Way)
RHW-33-lane RealHighway1 (Two-Way)
MIS RampModular Interchange System Ramp1 (One-Way)
2 (Two-Way)
RHW-44-lane RealHighway1 (One-Way)
2 (Two-Way)
RHW-6S6-lane Separable RealHighway1* (One-Way)
2* (Two-Way)
RHW-8S8-lane Separable RealHighway2 (One-Way)
4 (Two-Way)
RHW-10S10-lane Separable RealHighway2 (One-Way)
4 (Two-Way)
RHW-6C6-lane Combined RealHighway3 (Two-Way)
RHW-8C8-lane Combined RealHighway3 (Two-Way)


All widths of the RealHighway have access to L1 and L2 elevations, which are produced with separate starters. The MIS, RHW-4, and RHW-6S also have access to L3 and L4 elevations (only installed by Custom Installation), and as previously mentioned, the RHW-4 also has a double-decker form, the DDRHW-4 (decks at L1 and L2).

RHW Elevations

All of these override networks can either be constructed by first placing a Starter Piece, then dragging the appropriate default network through the starter, at which point the draggable network should convert to match the starter. This process is shown below.

(Click for full resolution)

Single-Tile RHW Starter

In the case of multi-tile override networks, they are still based off default single-tile networks, mainly due to limitations with the game's default dual-tile networks, and lack of triple-tile networks. Simply use the same process for each tile in the starter to complete the network.

(Click for full resolution)

Multi-Tile RHW Starter

Additionally, RHW Starter Pieces can be crossed by other RHW networks, allowing for maximally-stable highway-over-highway crossings.

RHW Starter Overcrossing
Zone Access Restrictions

The RealHighway family of networks is considered to be Highway-type by the game, and as such, this limits its ability to provide direct access to zones and buildings, as one would expect from a highway. This limitation is especially true of Residential (R) zones, which cannot be built at all along RHW networks, and attempting to have any zone type use RealHighway network frontage for access is not recommended. It is instead recommended that one downgrade to a non-highway network, such as the Road, One-Way Road, or one of the Network Widening Mod override networks if zone access is required.

 Capacities and Speeds

The capacity of each network depends on the Traffic Plugin one has installed. Capacity is generally calculated on a per tile basis by the game, as the game cannot read the number of lanes.

All RHW networks are also highway-type networks, meaning that they do not allow full access to RCI Zones. The capacities for the five standard capacity levels of the NAM Traffic Plugin are listed below. Please note that these capacities listed are for the full width of the network, rather than the per-tile capacity.

Note that networks with crossover paths (i.e. the RHW-6C, RHW-8S, RHW-8C, and RHW-10S), and those that use a special workaround (the RHW-3, DDRHW-4, and RHW-6S) have a 25% boost on capacity over the normal per-tile figure for the base RHW network. This boost can only be applied once, which is why the DDRHW-4, despite having one more lane than the RHW-3, has the same capacity. A similar situation exists with the RHW-6C and RHW-8C, and the RHW-8S and RHW-10S.

Note that these figures also apply to all elevated versions of each network width, such that the L0 RHW-4 will have the same capacity as its L1, L2, L3, and L4 counterparts.

RHW Network Type Classic Low Medium High Ultra
RHW-2 (single-tile capacity) 2700 6000 10000 15000 30000
RHW-3 (single-tile capacity) 3375 7500 12500 18750 37500
MIS Ramps (single-tile capacity) 2700 6000 10000 15000 30000
RHW-4 (dual-tile capacity) 5400 12000 20000 30000 60000
DDRHW-4 (single-tile capacity) 3375 7500 12500 18750 37500
RHW-6S (dual-tile capacity) 6750 15000 25000 37500 75000
RHW-6C (triple-tile capacity) 10125 22500 37500 56250 112500
RHW-8S (quadruple-tile capacity) 13500 30000 50000 75000 150000
RHW-8C (triple-tile capacity) 10125 22500 37500 56250 112500
RHW-10S (quadruple-tile capacity) 13500 30000 50000 75000 150000

The catalog speeds for the base RealHighway network are listed below. Note, however, that these catalog speeds are for 100% of catalog capacity, and that speeds on empty networks will exceed these figures by 30%, declining as the networks increase in volume per the Congestion vs. Speed Curve.

Vehicle TypeSpeed
Freight Truck130

*If one customizes the NAM Traffic Simulator using the Traffic Simulator Configuration Tool (TSCT), and selects the "Highway Bus Lanes" option, Bus speed on RealHighways will be boosted to 160.

**Pedestrians are only allowed on the L0 RHW-2 newtork.

 The Disconnector: A RealHighway-Safe Bulldozer

Due to the vestigial remnants of the unfinished network stub, the base RealHighway network possesses an auto-connect functionality, similar to the way the Street network operates. This can make the network's behavior rather erratic when using the game's base Bulldoze tool, and may result in more being demolished than one intended, particularly when dealing with complicated interchanges constructed entirely from RealHighway components.

Bulldozer Mess with RHW

To combat this issue, the RealHighway plugin comes with an alternative demolition tool, known as the Disconnector, which can be found under the Disconnector button on the Highways menu.

Disconnector Button RHW Disconnector Button

Plopping the Disconnector over a single tile of RealHighway, including starter pieces, FLEX pieces, and intersections (but not puzzle pieces) will demolish only the tile directly under the cursor.

Disconnector Cleanliness with RHW

The Disconnector is also used as part of some Pattern-Based Draggable setups used by the RealHighway plugin, particularly the Draggable Ramp Interfaces (DRIs). Additionally, it can be used in many situations with non-RHW networks as well.

 Constructing Diagonals and Base Curves

With the networks that are single-tile (RHW-2, RHW-3), or have self-contained single-tile halves (MIS, RHW-4, RHW-6S), one can simply drag the network out as would be normally expected in order to produce the curves to go diagonal with the network. Aside from the L0 RHW-2, however, the shared-tile "double diagonal" setup cannot be built, and pairs of MIS, RHW-4, and/or RHW-6S carriageways must be separated, out into a split-tile setup.

For the wider RHW networks (the RHW-8S, RHW-10S, RHW-6C, and RHW-8C), the split-tile diagonal setup must be used.

RHW Multi-Tile Diagonals

The default sharp 90-degree bends are only available with the RHW-2 and MIS Ramp networks (at all height levels), for the sake of realism. The MIS Ramp's version also overrides one "buffer tile" on either side of the bend itself, to produce a smoother result (one should take care not to impose upon these buffer tiles when building, as attempting to cram an intersection where they should go will simply destabilize the MIS Ramp override).

If one desires a smoother transition between orthogonal and diagonal, Wide-Radius Curves and Multi-Radius Curves provide a solution. Fractional Angle RealHighways (FARHW) are also available.

 Connecting RealHighways via Intersections, Crossings and Interchanges

The RealHighway system has two ways of connecting and crossing other networks: At-Grade and Grade-Separated. The smaller RealHighway networks, including the RHW-2 (L0-L2), RHW-3 (L0 only), MIS (L0-L2), and RHW-4 (L0-L2), have the ability to intersect and cross other networks at the same height level. To build these crossings, simply drag the desired RealHighway network through or up to the crossing network to build the type of crossing you want, just as one would with any other draggable network in the game.

RHW At-Grade Intersection

For grade-separated crossings, where networks at different height levels--for instance, an L1 RHW-4 and the game's default Elevated Rail network (which is at L2)--follow the same exact process. All RealHighway networks at all height levels support grade-separated crossings.

RHW Over/Undercrossing

On/Offramp (Ramp Interface) Basics

Since not all RealHighway networks support At-Grade Intersections/Crossings, but all do support Grade-Separated Crossings, if one does wish to provide access to another road-type network, or another RealHighway (RealHighways cannot build interchanges with Maxis Highways), one must use exit and entrance ramps and build an interchange, in order to connect the two networks. Unlike the Maxis Elevated and Ground Highways, the RealHighway system does not include single-piece/pre-fabricated "plop" interchanges (though this will change in a future release). Instead, it relies on a Modular Interchange System (MIS), in which the user assembles the interchange out of multiple smaller components. While this approach is more complex, it allows for much greater control over the design of interchanges, and opens the door for considerable user creativity. Interchanges will also take up more space than the hyper-condensed, pre-fabricated ones for the Maxis Highways, as the RealHighway is designed more to allow for realistic-scale interchanges.

At the core of the RealHighway's interchange system are the Ramp Interfaces, which allow exit and entrance ramps to branch off from or merge into the through lanes, or "mainline", of a stretch of highway.

RHW Ramp Interface Anatomy

There are three possible ways to construct Ramp Interfaces:

Note that there are some types of ramps that may only be possible through a certain construction method. FLEXRamps and DRIs are the preferred method for most ramp interfaces, and are the only option for most ramps involving elevated RealHighway networks. The puzzle piece method does presently contain a few specialized types that have not been made into FLEXRamp or DRI setups, however. A full listing of capabilities can be found here, and there is also a listing of all ploppable items (including FLEX and Puzzle Pieces). More details on constructing each type can be found below.

In order to use a ramp interface to connect a RealHighway to one's surface network, first, build the desired ramp interface. Then, from the end of the branch, simply drag the RealHighway network tool out from it, just like using a starter piece. The network will convert to match the ramp. From there, simply continue dragging in the desired pattern, adding curves and transitions as necessary, and intersect the surface street with an At-Grade Crossing. (Note that the Fractional Angle ramps, Types C and F, do not support dragging, and the appropriate Fractional Angle RealHighway (FARHW) puzzle pieces must be used instead.)

RHW Ramp to Road

In order to connect to another RealHighway, follow the same process, but instead of forming an At-Grade Crossing, simply connect the ramp into another Ramp Interface on the other RealHighway.

RHW Ramp to Ramp

There are a number of different types of Ramp Interfaces included in the plugin, but at their core, they serve one purpose--to connect RealHighway-based freeways/motorways to the surface streets, or other RealHighway-based freeways/motorways. There are two, sometimes three or even four parts to the name of each ramp interface type. These indicate the mainline width, the branch angle and width, as well as whether any of the branch lanes were "exit only" or "acceleration" lanes, added or subtracted from the mainline. Some more specialized ramp interfaces may append that fourth part, containing other information about the nature and location of the branch in relation to the mainline. The mainline portion will always indicate the width of the "top" portion of the ramp interface, where the mainline is guaranteed to be at its widest. In the case of FLEXRamps, since they are often shared by multiple networks, which override a base version, the mainline network is usually excluded from the in-game description. For the "type" designation, the number indicates the number of lanes included in the branch, while the letter indicates the branch angle and indicates whether the branch has any lanes that peel off (on exit) or join (on entrance) the mainline. The letter/number types translate as follows:

Type A1
Type A1
Type B1
Type B1
Type C1
Type C1
Type D1
Type D1
Type E1
Type E1
Type F1
Type F1
Type A2
Type A2
Type B2
Type B2
Type C2
Type C2
Type D2
Type D2
Type E2
Type E2
Type F2
Type F2
Type A3
Type A3
Not available
Type B3
Type B3
Not available
Type C3
Type C3
Type D3
Type D3
Not available
Type E3
Type E3
Not available
Type F3
Type F3
Not available

Below is a list of the modifiers:

Using FLEXRamps

FLEXRamps are ploppable FLEX on/offramp pieces, and are perhaps the easiest to navigate option to branch ramps off one's RealHighway system. The FLEXRamp pieces may be found under the FLEXRamps button on the Highways menu. To use the FLEXRamps, simply find the desired ramp design, and plop it down. Each FLEXRamp has a default network, but will convert to match if one drags another RHW override network through it, or plops the ramp over an existing stretch of an RHW override network. The process is shown below (the process of overriding the base setup of the Draggable Ramp Interfaces is identical):

RHW FLEXRamp Override

Due to the use of special network flags, FLEXRamps are relatively slope-tolerant, particularly compared to other ramp interface options.

Below is a list of the default networks for each FLEXRamp:

With the wider RHW networks (provided they are supported by the particular FLEXRamp type--see the piece description in game), for most situations, simply align the ramp interface with the shoulder tile for standard ramps, and with the median tile for the inside ramps. If trying to build an RHW-8S Type D2 or E2 setup, however, one should instead align it with the median tile. (Note also that the elevated versions of the RHW-6S do not support Type A1 setups, and the elevated versions of the RHW-8S do not support Type A1 setups, due to the overhang on the RHW-6S network.)

RampDefault Network
Type A1RHW-2
Type B1RHW-2
Type D1RHW-3
Type E1RHW-3
Type A2RHW-6S
Type B2RHW-6S
Type D2RHW-6S
Type E2RHW-6S
Type A1-InsideMIS Ramp
Type B1-InsideMIS Ramp
Type D1-InsideRHW-4
Type E1-InsideRHW-4

Building Draggable Ramp Interfaces (DRIs)

Draggable Ramp Interfaces, or DRIs, are ramp interfaces that are constructed as Pattern-Based Draggables, using the RealHighway network. With the exception of a very few specialized setups, virtually every RHW ramp interface setup can be built through draggable means, and at present, there are some ramps that are only possible as DRIs. Each ramp interface type supported by the system has a special drag pattern, which, when constructed, will subsequently convert into the appropriate on/offramp.

The below Table of DRI Patterns shows the exit ramp (entrance ramp for Left-Hand Traffic) setup. The corresponding entrance (or exit in Left-Hand Traffic) can be constructed by using the mirror image of these patterns. The process for overriding a FLEXRamp to have another RHW network as a mainline is identical to that of the FLEXRamps, as shown above. Elevated ramp interfaces can be constructed by dragging the appropriate elevated RHW network (L1-L4) or double-decker RHW through the DRI, which, provided the particular setup is supported by that network, will elevate the ramp. Many setups for narrower networks can be transformed into corresponding versions for wider networks by using the same method. This conversion is most reliable if the overriding network is dragged into the top end of the mainline.

Since the drag patterns involve the creation of intersections, the point where the actual mainline/branch split occurs will result in flat terrain, but the rest of a DRI is not limited in this regard.

The table below shows all of the basic drag patterns for the DRIs:

(Click for full resolution)

DRI Drag Patterns

Older Puzzle Piece Ramp Interfaces

A set of Puzzle Piece Ramp Interfaces also exists. While it was the original method for constructing ramp interfaces, it has largely become a deprecated method, aside from the few setups not covered otherwise, due to the demands it places on the menu system. The Puzzle Piece Ramp Interfaces exist under two buttons, the Puzzle Piece Ramp Interfaces button, and the Fractional Angle Ramp Interfaces button (which contains all the Type C and Type F ramps). One must find the precise puzzle piece needed for the particular setup on the desired network, and place it. As static puzzle pieces, these ramp interfaces cannot carry overrides.

Most (but not all) of the Puzzle Piece Ramp Interfaces have starters attached on their mainline approaches and branches, which does allow one to use them without having to place additional starters, but the presence of these starters also severely limits their slope tolerance. As such, they can generally only be used on flat terrain, or they will end up flattening parts of slopes. If the puzzle-based interface does not have a starter stub on its ends (as it the case with most of the Fractional Angle types), one must place it after constructing the base network, and a portion of the ramp.

QuickChange: A Shortcut to Quicker Interchanges

In addition to the ramp interfaces, a series of "shortcuts" exist, in the form of the FLEX-based QuickChange (QC) pieces. The QuickChanges include a base ramp interface (Type A1 by default) with a height transition already attached, and provide quadrants for standard diamond and parclo (partial-cloverleaf) interchanges. To build a QuickChange setup, simply place the desired setup, and as needed, drag an override network through the mainline portion (or plop it over an existing override network), after which point it will change to match.

The QuickChange pieces may be found under the QuickChange button on the Highways menu.

RHW QuickChange Button QuickChange Button

QuickChange still operates with the RealHighway's modular design philosophy in mind, and as such, is possible to swap in a different ramp interface type for the default Type A1 (such as a Type D1), simply by plopping the other ramp interface over the existing one.

QuickChange Ramp Change

Tutorial: Simple Diamond Interchange with QuickChange

To build a diamond interchange with the QuickChanges, in which the L1 RHW-4 crosses over a Road, first begin with the L1 RHW-4 Starter Pieces, and drag out with the RealHighway network tool to continue the overrides. Then, drag the Road underneath. Following that, place four QuickChange L1 RHW Partial Diamond pieces encircling the Road. The L1 RHW-2 base mainline of the QuickChanges should covert to match the L1 RHW-4 (if L1 RHW-2 lingers, simply click around the vicinity of the unconverted sections with the RealHighway network tool to get them to cooperate). After this, use the RealHighway network tool to drag between the height transitions, right through the Road. This will form the intersections between the ramps and the Road, thereby completing the interchange.

QuickChange Diamond Tutorial

This process can easily be adapted to other RHW networks, other surface street options (such as Avenues or Network Widening Mod networks), and to variants where the RHW is at ground level, and the surface street crosses over using one of the Draggable Elevated Road Viaducts.

 Transitioning to Other Networks

There are three types of transitions that exist in the RealHighway plugin: Height Transitions, Width Transitions, and Other Network Transitions. The first two cover cases between two RealHighway networks, while the latter covers transitions to non-RealHighway networks, i.e. Maxis and Network Widening Mod (NWM) networks.

There are two methods of constructing Height Transitions, both of which involve ploppable items: the FLEX-based FLEXHeight system (found under the "FLEXHeight" button), and the conventional puzzle piece approach (found under the "Height Transitions" button, now a "legacy/deprecated" item). The FLEXHeight system is the more full-featured of the two, and vastly exceeds the capabilities of the older puzzle piece form.

RHW FLEXHeight Button RHW FLEXHeight Button

RHW Old PP Height Button RHW Height Transition Puzzle Pieces Button (Only installed if "Legacy Height Transitions" option is selected.)

There are two subtypes of Height Transitions: "Ramp-Style" and "On-Slope". The former is designed for use on (relatively) level ground, and uses a multi-tile rise to get the RealHighway up to the desired height, and presently exists in an orthogonal version, a (limited) diagonal version, and a (limited) curved version. The latter is for use on an embankment, and exists in an orthogonal version, and a (limited) diagonal form. In order to ensure proper placement on the OnSlope transitions, use of the NAM's Hole Diggers and Raisers is recommended.

RHW Height Transition Types

The standard FLEXHeight transitions (orthogonal, diagonal, and curved) default to the base RHW-2 network (producing an elevated version of the RHW-2, either L1 or L2 out the other end). If wishing to simply use the RHW-2 network, plopping the piece down is all that is needed. (The 180-degree MIS Ramp transition is MIS-only, however, and dragging an RHW-2 into it will produce either an L0 or L1 MIS Ramp, depending on the end.) If using an On-Slope version, only drag the RHW network up to the edge of the transition, NOT through, in order to preserve the embankment.

Ramp-Style Usage
FLEXHeight 1a
On-Slope Usage
FLEXHeight 1b

To override the base RHW-2 configuration of the FLEXHeight transitions, either Ramp-Style or On-Slope, simply drag the desired override network into either end, and it will convert to match. If any tiles refuse to convert, simply click over the first point where the override stops complying, and it should convert. Placing starters on both sides of the transition ensures maximum stability.

FLEXHeight 2

If using a multi-tile network, simply place multiple FLEXHeight transitions adjacent to one another, and drag each tile of the multi-tile network into the ends of the transition.

FLEXHeight 3

On the orthogonal and diagonal transitions, is also possible to transition between two different elevations (i.e. L1 and L2 instead of L0 and L1), simply by plugging the appropriate overrides into the ends.

L1-L2 Transition

Additionally, 3-Level and 4-Level Ramp-Style transitions can be built by overlapping the ends of multiple FLEXHeight 1-Level or 2-Level pieces. Note that this can only be done with networks that support the L3 and L4 elevation (the RHW-4, MIS Ramp, and RHW-6S).

L0-L3 Transition

The Width Transitions include the new FLEXWidth transition (FLEX-WT) system, as well as the older "legacy/deprecated" puzzle piece-based Width Transitions.

FLEXWidth Transitions (FLEX-WT)

With the FLEXWidth transitions, these work similarly to the FLEXHeight transitions. Simply drag the appropriate networks into each end of the transition, which will, as appropriate, convert it to match.


For the large "S-to-C" transitions, due to the design of the FLEX piece, asymmetrical setups are possible. All networks involved in the transition must be at the same height level, and with the exception of the RHW-2-to-4 and RHW-3-to-4 transitions, which are L0/ground-level only, all height levels are available for FLEXWidth transitions.

FLEX-WT Asymmetry

Puzzle Piece Width Transitions (Legacy/Deprecated)

With the legacy puzzle piece-based Width Transitions, simply find the desired puzzle piece by using TAB/Shift-TAB to cycle through the options, and place it. Most Width Transitions already have starters on the ends--note, however, that this fact significantly limits the slope tolerance of these transitions.

Width Transition

Transitions to Non-RHW Networks

Transitions to non-RealHighway networks are accomplished simply by dragging the RealHighway and non-RealHighway network to meet. If the setup is supported, the transition will override to match the involved networks.

RHW-to-Non-RHW Transition

A full list of supported transition setups can be found here, and a listing of items under the transition-related menu buttons can be found here.

 Wide-Radius Curves (WRCs) and Multi-Radius Curves (MRCs)

The default draggable curves for the RealHighway networks are not exactly the smoothest or most realistic. The FLEX-based and draggable Multi-Radius Curves (MRCs) and the Puzzle Piece-based Wide-Radius Curves (WRCs) allow one to change that, by providing smoother curves with wider radii than the defaults. Both the FLEX and puzzle pieces can be found under the RealHighway Curves button on the Highways menu.

RHW Curves Button RHW Curves Button

Multi-Radius Curves (MRCs) [FLEX/Draggable]

The Multi-Radius Curves are a series of wider-radius curves that are constructed through either draggable means or with FLEX pieces. There are five radii total included in the MRC system--R1, R2, R3, R4, and R5, as well as an S-Curve and a Basketweave setup. The higher the number, the wider the radius (i.e. R2 has a wider radius than R1). As with many items, they default to the RHW-2, but they can support up to the RHW-6S width--more details as to precisely what is supported can be found here.


R1 curves, also known as "Mini-Curves", are constructed by draggable means, and can be easily constructed with a simple additional motion when building the default network curves. Simply drag in a straight, orthogonal motion through the entire default curve. Afterward, a smoother curve will appear. Alternatively, one can simply try to drag the curve to the diagonal one tile before an end stub, which will also trigger the R1 curve.


Note that with the RHW-6S, due to the overhang, a "bite" may appear to be missing from some curve setups. Simply click in the area of the missing "bite" with the RealHighway network tool to fill it.


R2 45 curves may be constructed either via draggable means or FLEX pieces. For the draggable R2 setup, drag the default curve as usual, and then build a 90 bend on the inside of the curve, at which point it should convert. To build the FLEX piece, simply select it from the menu and place it. The FLEX pieces--which include a 90 variant in addition to the 45 version--all default to the base L0 RHW-2 network, but dragging an override network into a FLEX MRC piece, or plopping one over top of an existing stretch of override network will cause it to convert to match, provided the network is supported for that particular setup.

RHW MRC Construction 2

Note also that the orthogonal ends of R2 curves can, in fact, overlap, allowing for one to create a smooth composite curve, which can be very useful in building aesthetically-pleasing interchange ramps.

RHW MRC R2 Overlap Technique

The R3, R4, and R5 radii only exist as FLEX pieces, and can be constructed the same way as the R2 FLEX piece. They do not, however, support the overlap/composite curve functionality of the R2 curves.

The Multi-Radius Curves do not support the creation of intersections or crossings at any point in the curve, and attempting to build one will destabilize the curve. The FLEXFly system does allow for an equivalent functionality, however.

Wide-Radius Curves (WRCs) [Puzzle]

In addition to the MRCs, a series of puzzle piece-based Wide-Radius Curves (WRCs) also exists, which at least partially cover all ground-level RealHighway networks. S-Curves exist for all networks, 45 curves exist for all but the RHW-6C and 8C, and 90 curves (in two radii--small and large) exist for the RHW-2 and MIS Ramps.

The Wide-Radius Curve puzzle pieces do NOT have starters on their ends, unlike many other older puzzle-based RealHighway items, and being puzzle-based, do not support overrides. As such, they generally must be built on top of an existing stretch of a RealHighway network. The network must already exist up to the point at which the curve piece begins. With S-Curves/Lane Shifts, the presence of base network stubs may allow one to simply place starters oneself on either end.

RHW WRC Construction

The S-Curves for the RHW-6C and RHW-8C are built in a modular fashion as well, to allow support for the asymmetrical "RHW-7C" setup. Simply build the full curve one half at a time.

C-Type RHW S-Curve

It is possible to also build larger composite 90 turns with the single-tile networks, using the RHW Filler Pieces, but this functionality does not exist for the RHW-8S, 10S, 6C, or 8C.

 Using the FLEXFly (Flexible Flyover) System

The FLEXFly (Flexible Flyover) pieces are FLEX-based curved flyover ramps, which can be crossed under or over by almost every RealHighway network (except for the L0 RHW-2, for the purposes of stability). They can be found under the FLEXFly button on the Highways menu.

RHW FLEXFly Button RHW FLEXFly Button

The FLEXFly pieces come in two angles--90 and 45--and both single-lane/MIS Ramp-based or dual-lane/RHW-4-based versions are available, at height levels from L0 to L2. Their curve radii are equivalent to the R2 Multi-Radius Curves.

To use a FLEXFly piece, first place the desired setup. Each FLEXFly will allow draggable orthogonal crossings at any point in the curve, provided the crossing network is at different height level than the FLEXFly itself. To create these crossings, just drag the network under/over the FLEXFly. To continue the flyover ramp, just drag out from the ends of the FLEXFly, just as if it were a starter piece, or connect it to other RealHighway-related items (like height transitions) as desired.

FLEXFly Usage

Note that FLEXFly pieces can only support a single crossing network at any given point. It is also not possible to have a FLEXFly piece cross over another FLEXFly piece--the result of this will be a blank tile at the point where the two collide. Additionally, FLEXFly pieces do not support the overlap/composite technique of the R2 Multi-Radius Curves.

FLEXFly No-Nos

 Fractional Angle RealHighways (FARHW)

One can also further their "grid-busting" efforts with the RealHighway system with the use of the Fractional Angle RealHighway (FARHW) Puzzle Pieces. The FARHW pieces allow one to build RealHighways at angles other than orthogonal and diagonal--currently, only 18.4/71.6 (or "FA-3", as it is known in Fractional Angle Network nomenclature).


The FARHW pieces exist under three different buttons--the main FARHW pieces button, which contains the base fractional angle network pieces, and curves to connect to orthogonal and diagonal networks, the FARHW Ramp Interfaces button, which contain ramp interfaces involving FARHW connections (including the Type C1, C2, F1, F2, and C3 ramps), and the FARHW Intersections and Transitions button, which contains intersection pieces with FARHW approaches, as well as width transitions between different FARHW widths.


RHW FA Ramps Button FARHW Ramp Interfaces Button

RHW FA Int Button FARHW Intersections and Transitions Button

In building stretches of FARHW, make sure that the line colors (or shoulder widths, if dealing with Euro textures) line up properly.


Note that, with the exception of the FARHW Ramp Interfaces, none of the other FARHW pieces have starters on their ends, much like the Wide-Radius Curves, so one must be sure to place the orthogonal or diagonal ends of curves over an existing stretch of network.

 Cosmetic Pieces

The Cosmetic Pieces are a set of puzzle pieces that are designed to allow one to exercise finer control of the look of their RealHighways, particularly with lane markings, such as auxiliary lane and HOV lane markings. Due to their sheer number (166 total at present), the Cosmetic Pieces are divided under four separate buttons, one for each tile width possibility (1-tile, 2-tile, and 3-tile), and one for cosmetic transitions. All four buttons can be found under the Highways menu.

RHW 1-Tile CP Button RHW 1-Tile Cosmetic Pieces Button

RHW 2-Tile CP Button RHW 2-Tile Cosmetic Pieces Button

RHW 3-Tile CP Button RHW 3-Tile Cosmetic Pieces Button

RHW CP Transition Button RHW Cosmetic Transitions Button

RHW Cosmetic Piece Sample

To use the Cosmetic Pieces, simply find the desired piece and place it. Please note that as puzzle pieces, the Cosmetic Pieces cannot accept or pass along overrides, albeit they can be placed over starter pieces in many situations.


The NAM does include bridges for various RealHighway networks. However, it is worth noting that there are some special caveats, due to a hardcoded restriction in the game's terrain engine, which prevents bridges from being built without at least a one-tile separation between them:

For the bridges that use the Maxis Highway as a base, there are overrides in place to seamlessly connect with the otherwise RealHighway-based networks. In order to create this smooth transition, ensure that only the end stub of the Maxis Highway network is showing at each end of the bridge. Then, simply drag each tile of the RealHighway override network into the Maxis Highway stubs. They will convert to match the RealHighway. This process is shown below.

MHW-based RHW Bridge Guide

Below is a list of all the bridges presently available. Maxis Ground Highway-based bridges will be marked with a bracketed note. (Click images for full resolution.)

RHW-2 Bridges
RHW-2 Bridges 1
RHW-3 Bridges

None at present

MIS Ramp Bridges
MIS Bridges 1
RHW-4 Bridges
RHW-4 Bridges 1 RHW-4 Bridges 2 RHW-4 Bridges 3 RHW-4 Bridges 4
RHW-6S Bridges
RHW-6S Bridges 1 RHW-6S Bridges 2 RHW-6S Bridges 3
RHW-8S Bridges
RHW-8S Bridges 1
RHW-10S Bridges
RHW-10S Bridges 1 RHW-10S Bridges 2
DDRHW-4 Bridges
DDRHW-4 Bridges 1
RHW-6C Bridges

Not possible due to terrain engine restriction.

RHW-8C Bridges

Not possible due to terrain engine restriction.


The base RealHighway network does NOT support tunnels. While certain slope settings may permit a tunnel to appear, it will be completely non-functional, due to hardcoded limitations that prevent traffic from using it. There is no known solution to this limitation at present. The only possible workaround at present is to transition to another network that does support tunnels, or to use the new FLEX/Draggable version of the Flexible Underpasses and URoads.

 A Note Regarding Neighbor Connections

While the single-tile, two-way RealHighway networks (the RHW-2, RHW-3, and DDRHW-4) can form functioning neighbor connections the standard way, attempting to do this with any other RealHighway network will result in only freight trucks being able to use the connection. This is because the game cannot handle one-way neighbor connections, as would be required with the RHW-4, MIS, and the various wider networks. As a result, special Neighbor Connectors (NCs) are required, in order to provide proper functionality for these override networks. These can be found under the RHW Neighbor Connector Pieces button.

RHW NC Button RHW Neighbor Connector Pieces Button

There are two types of pieces involved in RHW Neighbor Connections: Network Pieces and Invisible Loop Connectors.

To build the Neighbor Connection, build a standard Neighbor Connection through the normal draggable means with the network you wish to use.


Please note that no matter how you drag the RHW to the edge, the default yellow Neighbor Connection will always be facing the same way, unlike Avenue or Maxis Highway Neighbor Connections. (There is no way to change this, nor any need to do so.)


Then find the RHW Neighbor Connector button, and place the FLEX Neighbor Connector (FLEX-NC) over each network tile that will be part of the Neighbor Connection, on the the game's default yellow Neighbor Connection arrows. After that, simply drag the network through the FLEX-NC to connect it.

RHW FLEX Neighbor Connector Use

If the two sides of your RHW are separated by one or more tiles, place the Invisible Loop Connectors in the median area right next to the edge of the city tile, filling the gap. The Invisible Loop Connectors, which look like a blue arrow with an "N" inside, when placed, will show up invisible, but you can easily locate them by hovering a query tool over top, which will cause an otherwise invisible "ghost model" with the blue "N" arrow to appear:


Do not place the Invisible Loop Connectors directly over top of you network, as this is not what they were intended for and they will actually prevent your system from working. Due to how the pieces have to be set up, it is also possible you will see "spider cars" going down the edge of your city tile, and the paths will be draped over the edge of the city tile.


For "Combined" ("C-type") networks, such as the RHW-6C and 8C, simply place the FLEX-NC over top of the network at the edge of the city tile, and then drag the RHW-C network through it.

In order for the connection to work properly, this process must be repeated identically in the neighboring city tile, and the traffic simulation must be given some time to run in both involved city tiles in order for the game to recognize that there is a valid connection.

NOTE: With the addition of the FLEX Neighbor Connectors in NAM 42, all elevated networks are now supported.

 A Note About Specialized Crossings: SPUIs, Diverging Diamonds, and Volleyball Interchanges

The RealHighway system includes the ability to recreate three oft-requested interchange designs: the Single-Point Urban Interchange (SPUI), the Diverging Diamond Interchange (DDI), and the Volleyball Interchange. These are "advanced" features of the plugin, and it is recommended that you are already comfortable with the RealHighways, the NAM Elevated Viaducts and the either the FLEX Turn Lanes (FTL) or Turn Lane Extension Pieces (TuLEPs) before trying to build SPUIs or DDIs.

The SPUI and DDI setups can be found under the RHW/Avenue Interface button on the Roads menu, while the Volleyball pieces can be found under the old puzzle-based Ramps button on the Highways menu.

RHW/AVE Button RHW/Avenue Interface button Connector Pieces Button (contains SPUI and DDI items)

RHW Old Ramps Button RHW Puzzle Piece Ramps Button (contains Volleyball pieces)

Single-Point Urban Interchange (SPUI)

The Single-Point Urban Interchange, or more commonly, SPUI, is a type of high-capacity, grade-separated interchange, introduced in February 1974 in Clearwater, Florida by engineer Wallace Hawkes. While conventional diamond interchanges usually involve two separate intersections to provide access between a surface street and a highway, the SPUI combines the two intersections into a single intersection (usually with slip lanes), improving traffic flow. The RealHighway's SPUI functionality is provided via the FlexSPUI piece, found under the RHW x Avenue pieces button on the Roads menu. As the name implies, this SPUI piece is a FLEX piece, which allows for the construction of a SPUI between several different RealHighway networks with several different configurations, including Elevated SPUIs.

NOTE: FlexSPUI has was upgraded and redesigned for NAM 37, to provide proper support for newer RHW networks. The screenshots here show the previous version of FlexSPUI, which has a slightly different footprint, but the underlying construction process is identical.

In order to build a SPUI, place the FlexSPUI piece--it looks like half of a SPUI.


To complete the basic intersection, you'll need to plop another half of a SPUI. This half can be plopped next to the first one:


Or you can put a small gap between them and fill it in with an Avenue:


In either case, make sure to bulldoze the "construction site handles" on the piece. The ramp connections on the sides allow RHW-4 to be dragged out from them:


You can simply drag an elevated RHW over top of the FlexSPUI, like so:


In order to connect the Avenue end, use the either the Avenue Type 110 FLEX Turn Lanes or Turn Lane Extension Pieces:


It is also possible to elevate the FlexSPUI. Simply place an L2 connection (such as a transition) next to the ramp connection on the SPUI (NOTE: L1 did not exist when FlexSPUI was created). Most of one half of it will become elevated--simply click on the non-elevated part with the RHW network tool and it will raise up:


The overrides are most stable on the "incoming" part of the ramp connection ("outgoing" in Left-Hand Drive)--this shows the rest of the SPUI becoming elevated:


You can simply drag a ground-level RHW underneath the Elevated FlexSPUI, much as you dragged the Elevated RHW over the Ground FlexSPUI:


In order to connect the Avenue end, you will need to use the Avenue Type A On-Slope TuLEP. The NAM's Hole Digger and Raiser feature is highly recommended in order to get the embankment to the proper elevation.

For a video demonstration of FlexSPUI construction, please see Tarkus' YouTube videos on Ground FlexSPUI and Elevated FlexSPUI.

Diverging Diamond Interchange (DDI)

The Diverging Diamond Interchange (DDI), sometimes also called "Crossing Diamond", is an interchange that originated in France, but has recently caught on with North American highway engineers, through the work of American traffic engineer Gilbert Chlewicki. The Missouri Department of Transportation (MODOT) opened the first in the United States in Springfield on June 21, 2009. Since then, many more have opened up across the world. The DDI involves having traffic cross onto the "wrong" side of the road, which allows left turn movements flow more smoothly and traffic onto (and sometimes off) the freeway to go unsignalized, with only the through movements on the surface street requiring signalization.

The RHW includes a special puzzle piece allowing for the construction of a DDI with an Avenue, which, like the FlexSPUI, is found under the RHW x Avenue button on the Roads menu. To build a DDI, place the special DDI intersection pieces on either side of your RHW, and connect Avenues into the appropriate ends of the pieces. Use One-Way Roads and/or the draggable or puzzle piece-based Elevated One-Way Road Viaducts (for an elevated DDI) to build the "wrong side" traffic sections between the DDI intersection pieces. The connections to the RHW end are made via RHW-4.

Volleyball Interchange

The Volleyball Interchange, also commonly known as a Three-Level Diamond, or Split-Level Diamond, is a three-level interchange, in which all turning motions are handled by at-grade intersections on a separate height level from through traffic.

Under the old Puzzle Piece Ramp Interfaces button on the Highways menu, one can find a series of "Specialized Crossing Pieces" (SCPs) to handle Volleyball Interchange intersections. To use them, simply place them down, and place starter pieces between each intersection to connect them.


 Network and FLEX Piece Capabilities

 Capabilities of Each Network

YesThis particular feature can be constructed, with minimal (if any) limitations.
Partial SupportThis particular feature can be constructed, but not in all instances. Details will be given as to what is/is not possible. Partial support may be for intentional design reasons (such as realism or general unfeasibility), or simply because the feature has not been fully developed.
Limited SupportThis particular feature can be constructed, but only in extremely limited circumstances. Instances that are possible may be listed, insofar as it is possible. Use at your own risk.
No SupportThis particular feature cannot be constructed. This restriction could be for intentional design reasons (such as realism, or general unfeasibility), or simply because it has not yet been developed.

OxO: OxO stands for "orthogonal x orthogonal", and refers to a situation where both networks are orthogonal (in a straight line) along the game's grid, intersecting perpendicularly (at 90 angles at all corners)

OxD: OxD stands for "orthogonal x diagonal", and refers to a situation where the given network is orthogonal (in a straight line) along the game's grid, and the cross network is diagonal (running at a 45 angle).

DxO: DxO stands for "diagonal x orthogonal", and refers to a situation where the base network is diagonal (running at a 45 angle), and the cross network is orthogonal (in a straight line) along the game's grid.

DxD: DxD stands for "diagonal x diagonal", and refers to a situation where both networks are diagonal (running at a 45 angle) along the game's grid, intersecting perpendicularly (at 90 angles at all corners)

Available Height Levels

MIS RampsYesYesYesYesYesNo

Base Network Features

NETWORKBase OrthogonalsBase DiagonalsOrtho 90 BendOrtho S-CurveDiag 90 "Boomerang" BendDiag S-Curve
L0 RHW-2YesYesYesYesYesYes
L0 RHW-3YesYesNoYesNoNo
L0 MIS RampYesYesYesYesYesYes
L0 RHW-4YesYesNoYesNoNo
L0 RHW-6SYesYesNoYesNoNo
L0 RHW-8SYesYesNoYesNoNo
L0 RHW-10SYesYesNoYesNoNo
L0 RHW-6CYesYesNoYesNoNo
L0 RHW-8CYesYesNoYesNoNo
L1-L2 RHW-2YesYesYesYesYesYes
L1-L2 RHW-3YesYesNoYesNoNo
L1-L4 MIS RampYesYesYesYesYesYes
L1-L4 RHW-4YesYesNoYesNoNo
L1-L4 RHW-6SYesYesNoYesNoNo
L1-L2 RHW-8SYesYesNoYesNoNo
L1-L2 RHW-10SYesYesNoYesNoNo
L1-L2 RHW-6CYesYesNoYesNoNo
L1-L2 RHW-8CYesYesNoYesNoNo
DD RHW-4YesYesNoYesNoNo


Network Draggable At-Grade Intersections (RD/OWR/AVE/NWM/Rail/GLR) Draggable Crossings (Elevated Rail/Monorail/HSR/RD-OWR-AVE-Rail Viaducts) Ramp Interfaces Draggable Transitions to Non-RHW Networks OxO with RHWs at Other Heights OxD/DxO with RHWs at Other Heights DxD with RHWs at Other Heights Bridges over Water
L0 RHW-2 Yes Yes (L2 RD/OWR/AVE Viaducts OxO Only) Yes Yes
(Road, Avenue, TLA-3, AVE-2, NRD-4)
Yes Yes Yes Yes
L0 RHW-3 OxO Only, no NWM Networks Yes (L2 RD/OWR/AVE Viaducts OxO Only) Yes Yes (ARD-3) Yes Yes Yes No
L0 MIS Yes (no Rail/GLR) Yes (L2 RD/OWR/AVE Viaducts OxO Only) Yes Yes (One-Way Road, OWR-1) Yes Yes Yes Yes
L0 RHW-4 Yes (No NWM Networks, Avenues and RD/OWR/AVE Viaducts OXO Only) Yes (L2 RD/OWR/AVE Viaducts OxO Only) Yes Yes (One-Way Road, Avenue, Ground Maxis Highway, TLA-5, RD-4) Yes Yes Yes Yes
L0 RHW-6S No Yes (L2 RD/OWR/AVE Viaducts OxO Only) Yes Yes (OWR-3, RD-6) Yes Yes Yes Yes
L0 RHW-8S No Yes (L2 RD/OWR/AVE Viaducts OxO Only) Yes Yes (OWR-4) Yes Yes Yes Yes (MHW-based)
L0 RHW-10S No Yes (L2 RD/OWR/AVE Viaducts OxO Only) Yes Yes (OWR-5) Yes Yes Yes Yes (MHW-based)
L0 RHW-6C No Yes (L2 RD/OWR/AVE Viaducts OxO Only) Yes Yes (TLA-7, AVE-6) Yes Yes Yes No
L0 RHW-8C No Yes (L2 RD/OWR/AVE Viaducts OxO Only) Yes No Yes Yes Yes No
L1 RHW-2 L1 RD/OWR/AVE Viaducts, L1 RHW-2 and MIS [all OXO only] RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes Yes No
L1 RHW-3 No RD/OWR/AVE Viaducts OXO Only No No Yes Yes Yes No
L1 MIS L1 RD/OWR/AVE Viaducts, L1 RHW-2 [all OXO only] L1 RD/OWR/AVE Viaducts [all], L2 RD/OWR/AVE Viaducts [OXO Only] Yes No Yes Yes Yes No
L1 RHW-4 L1 RD/OWR/AVE Viaducts [all OXO only] RD/OWR/AVE Viaducts OXO Only Yes Yes (L1 AVE Viaducts [all OXO only]) Yes Yes Yes No
L1 RHW-6S No RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes Yes No
L1 RHW-8S No RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes No No
L1 RHW-10S No RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes No No
L1 RHW-6C No RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes No No
L1 RHW-8C No RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes No No
L2 RHW-2 L2 RD/OWR/AVE Viaducts, L2 RHW-2 [all OXO only] RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes Yes No
L2 RHW-3 No RD/OWR/AVE Viaducts OXO Only No No Yes Yes Yes No
L2 MIS Yes (L2 RD/OWR/AVE Viaducts, L2 RHW-2 [all OXO only]) RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes Yes Yes
L2 RHW-4 Yes (L2 RD/OWR/AVE Viaducts [all OXO only]) RD/OWR/AVE Viaducts OXO Only Yes Yes (L2 AVE Viaducts, Elevated MHW with MHO [Orth only]) Yes Yes Yes Yes
L2 RHW-6S No RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes Yes No
L2 RHW-8S No RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes No No
L2 RHW-10S No RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes No No
L2 RHW-6C No RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes No No
L2 RHW-8C No RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes No No
L3 MIS No RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes Yes No
L3 RHW-4 No RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes Yes No
L3 RHW-6S No RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes Yes No
L4 MIS No RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes Yes No
L4 RHW-4 No RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes Yes No
L4 RHW-6S No RD/OWR/AVE Viaducts OXO Only Yes No Yes Yes Yes No
DD RHW-4 No Yes (L0/Ground Undercrossings Only) Yes No Yes Yes Yes Yes
Network Draggable At-Grade Intersections (RD/OWR/AVE/NWM/Rail/GLR) Draggable Crossings (Elevated Rail/Monorail/HSR/RD-OWR-AVE-Rail Viaducts) Ramp Interfaces Draggable Transitions to Non-RHW Networks OxO with RHWs at Other Heights OxD/DxO with RHWs at Other Heights DxD with RHWs at Other Heights Bridges over Water

FLEXRamp/Draggable Ramp Interface (DRI) Types

Orthogonal Mainline

Note that QuickChange support requires support for A1 ramps.

L0 RHW-2YesNoYesYesNoPP OnlyNoDRI/PP OnlyNoDRI OnlyDRI/PP OnlyNoPP OnlyNo
L0 RHW-3YesNoNoYesNoNoNoYesNoNoYesNoNoNo
L0 MISYesYesYesYesYesPP OnlyNoNoNoNoNoNoNoNo
L0 RHW-4YesYesYesYesYesPP OnlyPP OnlyYesYesDRI/PP OnlyYesYesPP OnlyPP Only
L0 RHW-6SYesYesYesYesYesPP OnlyNoYesYesDRI/PP OnlyYesYesPP OnlyNo
L0 RHW-8SYesYesYesYesYesPP OnlyNoYesYesDRI OnlyYesYesPP OnlyNo
L0 RHW-10SYesYesYesYesYesNoNoYesYesDRI OnlyYesYesPP OnlyNo
L0 RHW-6CYesNoYesYesYesNoPP OnlyNoNoNoNoNoNoNo
L0 RHW-8CYesNoYesYesNoNoNoYesNoDRI OnlyYesNoPP OnlyNo
L1-L2 RHW-2YesNoNoYesNoNoNoDRI OnlyNoNoDRI OnlyNoNoNo
L1-L2 RHW-3NoNoNoNoNoNoNoNoNoNoNoNoNoNo
L1-L4 MISYesYesNoYesYesNoNoNoNoNoNoNoNoNo
L1-L4 RHW-4YesYesNoYesYesNoNoYesDRI OnlyNoYesDRI OnlyNoNo
L1-L4 RHW-6SNoYesNoYesYesNoNoYesDRI OnlyNoYesDRI OnlyNoNo
L1-L2 RHW-8SYesYesNoYesYesNoNoNoNo (earlier "DRI Only" in error)NoYesNo (earlier "DRI Only" in error)NoNo
L1-L2 RHW-10SYesYesNoYesYesNoNoYesNo (earlier "DRI Only" in error)NoYesNo (earlier "DRI Only" in error)NoNo
L1-L2 RHW-6CYesNoNoYesNoNoNoNoNoNoNoNoNoNo
L1-L2 RHW-8CYesNoNoYesNoNoNoYesNoNoYesNoNoNo
DD RHW-4YesYesNoYesYesNoNoNoNoNoNoNoNoNo

NETWORKA1-DualA1/B1-DualB1-DualD1-WyeD1-Folded WyeD1-Dual ShiftD1-Dual InsideE1-Wye
L0 RHW-2YesYesYesDRI/PP OnlyDRI/PP OnlyNoNoDRI/PP Only
L0 RHW-3YesNoYesNoNoNoNoNo
L0 RHW-8SNoNoNoNoNoPP OnlyNoNo
L0 RHW-10SNoNoNoNoNoNoNoNo
L0 RHW-6CNoNoNoNoNoPP OnlyYesNo
L0 RHW-8CNoNoNoNoNoYesYesNo
L1-L2 RHW-2YesNoYesNoNoNoNoNo
L1-L2 RHW-3NoNoNoNoNoNoNoNo
L1-L4 RHW-4NoNoNoNoNoNoNoNo
L1-L4 RHW-6SNoNoNoNoNoNoNoNo
L1-L2 RHW-8SNoNoNoNoNoNoNoNo
L1-L2 RHW-10SNoNoNoNoNoNoNoNo
L1-L2 RHW-6CNoNoNoNoNoNoNoNo
L1-L2 RHW-8CNoNoNoNoNoNoNoNo

L0 RHW-2NoNoNoNoNoNoNoNoNoNoNoNoNoNo
L0 RHW-3NoNoNoNoNoNoNoNoNoNoNoNoNoNo
L0 RHW-4NoNoNoNoNoNoNoNoNoNoNoNoNoNo
L0 RHW-6SYesYesYesPP OnlyYesYesYesPP OnlyNoNoNoNoNoNo
L0 RHW-8SNoYesYesPP OnlyYesYesYesPP OnlyNoNoNoNoNoNo
L0 RHW-10SYesYesYesPP OnlyNoYesYesPP OnlyNoNoPP OnlyNoNoNo
L0 RHW-8CYesNoYesPP OnlyNoNoNoNoNoNoNoNoNoNo
L1-L2 RHW-2NoNoNoNoNoNoNoNoNoNoNoNoNoNo
L1-L2 RHW-3NoNoNoNoNoNoNoNoNoNoNoNoNoNo
L1-L4 RHW-4NoNoNoNoNoNoNoNoNoNoNoNoNoNo
L1-L4 RHW-6SYesNoYesNoYesYesYesNoNoNoNoNoNoNo
L1-L2 RHW-8SNoNoYesNoYesNoNoNoNoNoNoNoNoNo
L1-L2 RHW-10SNoNoYesNoNoYesNoNoNoNoNoNoNoNo
L1-L2 RHW-6CNoNoNoNoNoNoNoNoNoNoNoNoNoNo
L1-L2 RHW-8CNoNoNoNoNoNoNoNoNoNoNoNoNoNo

Diagonal Mainline

NETWORKA1B1C1D1E1F1All Other Setups
L0 RHW-2YesYesNoYes (drag MIS in bottom of mainline)Yes (drag MIS into bottom of mainline)NoNo
L0 RHW-3YesYesNoYesYesNoNo
L0 MISYesYesPP OnlyNoNoNoNo
L0 RHW-4YesYesPP OnlyYesYesPP OnlyNo
L0 RHW-6SYesYesPP OnlyYesYesPP OnlyNo
L0 RHW-8SYesYesNoYesYesNoNo
L0 RHW-10SYesYesNoYesYesNoNo
L0 RHW-6CYesYesNoNoNoNoNo
L0 RHW-8CYesYesNoYesYesNoNo
L1-L4/DD NetworksNoNoNoNoNoNoNo

Fractional Angle Mainline

All NetworksNo Support

FLEXHeight Transitions

Orthogonal Ramp-Style Transitions
Orthogonal On-Slope Transitions
Diagonal Ramp-Style Transitions
Diagonal On-Slope Transitions

FLEXWidth Transitions

Orthogonal Transitions
MIS RampNoNoSelfL0-L4NoNoNoNoNoNo
RHW-4L0L0L0-L4SelfL0-L4NoNoL0-L2NoL1/L2 Dual
DDRHW-4NoNoNoL1/L2 DualNoNoNoNoNoSelf

Note: S-to-C Transitions support asymmetrical combos, so additional possibilities exist beyond what is strictly indicated on this table, with the only limitation being that each network have the same number of lanes or differ by only one per side-- i.e. RHW-6S (3 lanes per side) can transition to RHW-4 (2 lanes per side), RHW-6C (3 lanes per side), and RHW-8C (4 lanes per side).

FLEXFly Crossings

L0 RHW-2NoNoNoNoNo
All Other L0 NetworksNoYesYesYesYes
All L1 NetworksYesNoYesYesYes
All L2 NetworksYesYesNoYesYes
All L3 NetworksYesYesYesNoYes
All L4 NetworksYesYesYesYesNo

FlexSPUI Crossings

NetworkL0 FlexSPUI SupportL2 FlexSPUI Support
L0 RHW-2NoNo
L0 RHW-3NoYes
L0 RHW-4NoYes
L0 RHW-6SNoYes
L0 RHW-8SNoYes
L0 RHW-10SNoYes
L0 RHW-6CNoYes
L0 RHW-8CNoYes
All L1 NetworksYesYes
L2 RHW-2NoNo
L2 RHW-3YesNo
L2 RHW-4YesNo
L2 RHW-6SYesNo
L2 RHW-8SYesNo
L2 RHW-10SYesNo
L2 RHW-6CYesNo
L2 RHW-8CYesNo
All L3 NetworksYesYes
All L4 NetworksYesYes

Wide-Radius/Multi-Radius Curves

NETWORK R1 45 MRC R2 45 MRC R2 90 MRC R3 45 MRC R4 45 MRC R5 45 MRC S-Curve PP 45 Curve PP Dual 45 Curve PP Small 90 Curve PP Large 90 Curve PP
L0 RHW-2 Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
L0 RHW-3 No No No No No No Yes Yes No No No
L0 MIS Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
L0 RHW-4 Yes Yes Yes Yes Yes Yes Yes Yes Yes No No
L0 RHW-6S Yes Yes Yes Yes Yes Yes Yes Yes Yes No No
L0 RHW-8S No No No No No No No Yes No No No
L0 RHW-10S No No No No No No No Yes No No No
L0 RHW-6C No No No No No No Yes No No No No
L0 RHW-8C No No No No No No Yes No No No No
L1-L2 RHW-2 Yes Yes No No No No No No No No No
L1-L2 RHW-3 No No No No No No No No No No No
L1-L2 MIS Yes Yes Yes No No No No No No No No
L1-L2 RHW-4 Yes Yes Yes No No No No No No No No
L1-L2 RHW-6S Yes Yes No No No No No No No No No
L1-L2 RHW-8S No No No No No No No No No No No
L1-L2 RHW-10S No No No No No No No No No No No
L1-L2 RHW-6C No No No No No No No No No No No
L1-L2 RHW-8C No No No No No No No No No No No
All L3 Networks No No No No No No No No No No No
All L4 Networks No No No No No No No No No No No
DD RHW-4 No No No No No No No No No No No

Fractional Angle Support

As Fractional Angle support for the RHW is entirely puzzle piece-based at present, see the listings in the Menu Items section, under the FARHW, FARHW Ramp Interfaces, and FARHW Intersections and Transitions buttons.


See Base Features above, as well as the Bridges section of the documentation.


NetworksAll Setups
All NetworksNo Support (not possible)

 List of Menu Items

RHW-2 Network ButtonRHW-2 Network Button (located under the Highways Menu)

This button activates the base draggable RealHighway network tool, which defaults to the RHW-2 network. The use of Starter and various FLEX pieces can initiate overrides, transforming the RHW-2 into other networks.

RHW Starters ButtonStarter Pieces (located under the Highways Menu)

The Starter Pieces allow one to widen and/or elevate their RealHighways, by dragging the base RealHighway network tool through them, causing them to convert to match.

  1. L0 RHW-4 Starter
  2. L0 MIS Starter
  3. L0 RHW-3 Starter
  4. L0 RHW-6S Starter
  5. L0 RHW-6C Starter
  6. L0 RHW-8S Starter
  7. L0 RHW-8C Starter
  8. L0 RHW-7C Starter
  9. L0 RHW-10S Starter
  10. L1 RHW-2 Starter
  11. L1 RHW-4 Starter
  12. L1 MIS Starter
  13. L1 RHW-3 Starter
  14. L1 RHW-6S Starter
  15. L1 RHW-6C Starter
  16. L1 RHW-8S Starter
  17. L1 RHW-8C Starter
  18. L1 RHW-7C Starter
  19. L1 RHW-10S Starter
  20. L2 RHW-2 Starter
  21. L2 RHW-4 Starter
  22. L2 MIS Starter
  23. L2 RHW-3 Starter
  24. L2 RHW-6S Starter
  25. L2 RHW-6C Starter
  26. L2 RHW-8S Starter
  27. L2 RHW-8C Starter
  28. L2 RHW-7C Starter
  29. L2 RHW-10S Starter
  30. L3 RHW-4 Starter
  31. L3 MIS Starter
  32. L3 RHW-6S Starter
  33. L4 RHW-4 Starter
  34. L4 MIS Starter
  35. L4 RHW-6S Starter
  36. DDRHW-4 Starter
RHW Fillers ButtonFiller Puzzle Pieces (located under the Highways Menu)

The Filler Puzzle Pieces exist to ease use in tight spaces, where overrides break down and the use of a starter is not feasible. Note that the RHW-8S, 10S, 6C, and 8C do not have diagonal fillers.

  1. L0 RHW-4 Filler Piece
  2. L0 Diag RHW-4 Filler Pieces (A and B)
  3. L0 WRHW-2 Filler Piece
  4. L0 MIS Filler
  5. L0 Diag MIS Filler Pieces (A and B)
  6. L0 RHW-3 Filler
  7. L0 Diag RHW-3 Filler Pieces (A and B)
  8. L0 RHW-6S Filler
  9. L0 Diag RHW-6S Filler Pieces (A and B)
  10. L0 RHW-6C Filler
  11. L0 RHW-8S Filler
  12. L0 RHW-8C Filler
  13. L0 RHW-7C Filler
  14. L0 RHW-10S Filler
  15. L1 RHW-2 Filler
  16. L1 RHW-4 Filler
  17. Diag L1 RHW-4 Filler Pieces (A and B)
  18. L1 MIS Filler
  19. Diag L1 MIS Filler Pieces (A and B)
  20. L1 RHW-3 Filler
  21. Diag L1 RHW-3 Filler Pieces (A and B)
  22. L1 RHW-6S Filler
  23. Diag L1 RHW-6S Filler Pieces (A and B)
  24. L1 RHW-6C Filler
  25. L1 RHW-8S Filler
  26. L1 RHW-8C Filler
  27. L1 RHW-7C Filler
  28. L1 RHW-10S Filler
  29. L2 RHW-2 Filler
  30. L2 RHW-4 Filler
  31. Diag L2 RHW-4 Filler Pieces (A and B)
  32. L2 MIS Filler
  33. Diag L2 MIS Filler Pieces (A and B)
  34. L2 RHW-3 Filler
  35. Diag L2 RHW-3 Filler Pieces (A and B)
  36. L2 RHW-6S Filler
  37. Diag L2 RHW-6S Filler Pieces (A and B)
  38. L2 RHW-6C Filler
  39. L2 RHW-8S Filler
  40. L2 RHW-8C Filler
  41. L2 RHW-7C Filler
  42. L2 RHW-10S Filler
  43. L3 RHW-4 Filler
  44. Diag L3 RHW-4 Filler Pieces (A and B)
  45. L3 MIS Filler
  46. Diag L3 MIS Filler Pieces (A and B)
  47. L3 RHW-6S Filler
  48. Diag L3 RHW-6S Filler Pieces (A and B)
  49. L4 RHW-4 Filler
  50. Diag L4 RHW-4 Filler Pieces (A and B)
  51. L4 MIS Filler
  52. Diag L4 MIS Filler Pieces (A and B)
  53. L4 RHW-6S Filler
  54. Diag L4 RHW-6S Filler Pieces (A and B)
  55. DDRHW-4 Filler
  56. Diag DDRHW-4 Filler Pieces (A and B)
QuickChange ButtonQuickChange Pieces (located under the Highways Menu)

The QuickChange Pieces offer pre-constructed quadrants of full interchanges, in FLEX format. For more details, see the QuickChange portion of this document.

  1. QuickChange L0/L1 Diamond
  2. QuickChange L1/L0 Diamond
  3. QuickChange L0/L1 Parclo-Inner
  4. QuickChange L1/L0 Parclo-Inner

RHW FLEXRamps ButtonFLEXRamps (located under the Highways Menu)

The FLEXRamps offer an easy way to have on/offramps branch off one's RealHighways. Being FLEX pieces, a single piece can work for multiple networks. For more details, see the FLEXRamps portion of this document. To access diagonal versions (available for A1, B1, D1, and E1 ramps), simply rotate the piece with Home/End until the piece rotates appropriately.

  1. Type A1 FLEXRamp
  2. Type B1 FLEXRamp
  3. Type D1 FLEXRamp
  4. Type E1 FLEXRamp
  5. Type A2 FLEXRamp
  6. Type B2 FLEXRamp
  7. Type D2 FLEXRamp
  8. Type E2 FLEXRamp
  9. Type A1-Diagonal FLEXRamp
  10. Type B1-Diagonal FLEXRamp
  11. Type A1-Inside FLEXRamp
  12. Type B1-Inside FLEXRamp
  13. Type D1-Inside FLEXRamp
  14. Type E1-Inside FLEXRamp
  15. Type D1-Inside Dual Shift FLEXRamp
FLEXRamp 1 FLEXRamp 2 FLEXRamp 3
RHW Old PP Ramps ButtonPuzzle Piece Ramp Interfaces and Specialized Crossings (located under the Highways Menu)

These puzzle pieces allow you to connect your RHW system through grade-separated interchanges to your surface street (Road, Avenue, One-Way Road) system, or to connect with other RHWs. Types A, B, D and E are located under this button, while Type C and F are located under the Fractional Angle RHW button. The Volleyball Specialized Crossing Pieces are also located here, in the non-deprecated section at the beginning of the TAB Ring. Note that aside from a few specialized setups, the pieces under this button are largely deprecated, and the use of FLEXRamps or DRIs will offer better functionality.

  1. RHW-3 Type A1/Type B1 Dual
  2. RHW-6C Type D1 Dual Shift
  3. RHW-8S Type D1 Dual Shift
  4. RHW-6C Type D1 Dual Inside Shift
  5. Diagonal RHW-6C Type A1
  6. RHW-10S Type D2
  7. RHW-10S Type E2
  8. Type 4-A1 Volleyball Intersection
  9. Type 4-D1 Volleyball Intersection
  10. Type 4-A2A Volleyball SCP
  11. Type 4-A2B Volleyball SCP
  12. Type 4-A2C Volleyball SCP
  13. RHW-4 Type A1 [DEPRECATED]
  14. RHW-4 Type A1 Diagonal [DEPRECATED]
  15. RHW-4 Type B1 [DEPRECATED]
  16. RHW-4 Type B1 Diagonal [DEPRECATED]
  17. RHW-4 Type A1 Inside [DEPRECATED]
  18. RHW-4 Type A1 Wide [DEPRECATED]
  19. RHW-4 Type D1 [DEPRECATED]
  20. RHW-4 Type E1 [DEPRECATED]
  21. RHW-4 Type E1 Wye [DEPRECATED]
  22. ERHW-4 Type A1 [DEPRECATED]
  23. ERHW-4 Type A1 Inside [DEPRECATED]
  24. RHW-3 Type A1 [DEPRECATED]
  25. RHW-3 Type B1 [DEPRECATED]
  26. RHW-2 Type A1 [DEPRECATED]
  27. RHW-2 Type A1 Dual [DEPRECATED]
  28. RHW-2 Type B1 [DEPRECATED]
  29. RHW-2 Type B1 Dual [DEPRECATED]
  30. RHW-2 Type D1 [DEPRECATED]
  31. RHW-2 Type D1 Wye [DEPRECATED]
  32. RHW-2 Type D1 Folded [DEPRECATED]
  33. RHW-2 Type E1 [DEPRECATED]
  34. RHW-2 Type E1 Wye [DEPRECATED]
  35. ERHW-2 Type A1 [DEPRECATED]
  36. RHW-6S Type A1 [DEPRECATED]
  37. RHW-6S Type B1 [DEPRECATED]
  38. RHW-6S Type A1 Wide [DEPRECATED]
  39. RHW-6S Type D1 [DEPRECATED]
  40. RHW-6S Type E1 [DEPRECATED]
  41. RHW-6S Type A2 [DEPRECATED]
  42. RHW-6S Type B2 [DEPRECATED]
  43. ERHW-6S Type D1 [DEPRECATED]
  44. RHW-6C Type A1 [DEPRECATED]
  45. RHW-6C Type B1 [DEPRECATED]
  46. RHW-8S Type A1 [DEPRECATED]
  47. RHW-8S Type B1 [DEPRECATED]
  48. RHW-8S Type D1 [DEPRECATED]
  49. RHW-8S Type E1 [DEPRECATED]
  50. RHW-8S Type D2 [DEPRECATED]
  51. RHW-8S Type E2 [DEPRECATED]
  52. RHW-8C Type A1 [DEPRECATED]
  53. RHW-8C Type B1 [DEPRECATED]
  54. RHW-8C Type D1 [DEPRECATED]
  55. RHW-8C Type E1 [DEPRECATED]
  56. RHW-10S Type A1 [DEPRECATED]
  57. RHW-10S Type B1 [DEPRECATED]
  58. RHW-10S Type D1 [DEPRECATED]
  59. RHW-10S Type E1 [DEPRECATED]
  60. DDRHW-4 Type A1 [DEPRECATED]
RHW FLEXHeight ButtonFLEXHeight Transitions (located under the Highways Menu)

These FLEX pieces allow you to transition to a different elevation with your RealHighway networks. The "1-Level" and "2-Level" setups can be used with any network, while the 180 MIS Curve will only work with the L0 and L1 MIS.

  1. FLEXOnSlope 1-Level
  2. FLEXOnSlope 2-Level
  3. FlexHT L0-L1 1-Level
  4. FlexHT L0-L2 2-Level
  5. 180-Degree MIS 1-Level Transition
  6. Diag FLEXOnSlope 1-Level
  7. Diag FLEXOnSlope 2-Level
RHW Old Height Transition PP Button[Old] Height Transition Puzzle Pieces (located under the Highways Menu)

These older puzzle pieces allow for transitions between two different height levels of RHW networks. They generally have starter drag end stubs. Use of the FLEXHeight Transitions is generally recommended instead, as they support more networks. The MIS Curved Height Transitions are the only setups not presently covered by FLEXHeight.

  1. RHW-2-to-RHW-4 Transition A
  2. RHW-2-to-RHW-4 Transition B
  3. RHW-4-to-RHW-6S Transition Style A
  4. RHW-6-to-8 Transition Style A
  5. RHW-8-to-10 Transition Style A
  6. RHW-4-to-6C Transition
  7. RHW-6C-to-6S Transition A
  8. RHW-6C-to-6S Transition B
  9. RHW-6C to RHW-8C transition
  10. RHW-6C-to-8 Transition
  11. MIS-to-RHW-4 Transition
  12. RHW-2-to-3 Transition
  13. RHW-2-to-WRHW-2 Transition
  14. WRHW-2-to-RHW-3 Transition
  15. RHW-3-to-RHW-4 Transition A1/A2
  16. RHW-3-to-RHW-4 Transition B1/B2
  17. RHW-4 Ground-to-Elevated ON
  18. RHW-4 Ground-to-Elevated OFF
  19. RHW-4 Ground-to-Elevated On-Slope ON
  20. RHW-4 Ground-to-Elevated On-Slope OFF
  21. RHW-6S Ground-to-Elevated ON/OFF
  22. RHW-6S Ground-to-Elevated On-Slope ON/OFF
  23. MIS Ground-to-Elevated L2 ON
  24. MIS Ground-to-Elevated L2 OFF
  25. MIS Ground-to-Elevated L2 On-Slope ON
  26. MIS Ground-to-Elevated L2 On-Slope OFF
  27. RHW-2 Ground-to-Elevated L2
  28. RHW-2 Ground-to-Elevated L2 T On-Slope
  29. RHW-2 Ground-to-Elevated L2 On-Slope
  30. RHW-6C Ground-to-Elevated L2
  31. RHW-6C Ground-to-Elevated L2 On-Slope
  32. MIS Ground-to-Elevated L2 Curved ON
  33. MIS Ground-to-Elevated L2 Curved OFF
  34. MIS Ground-to-Elevated L2 Curved ON Starterless
  35. MIS Ground-to-Elevated L2 Curved OFF Starterless
  36. L2-ERHW-4 to L3-ERHW-4 transition Starterless
  37. RHW-4 Ground-to-Mid-Elevated L3 Starterless
  38. MIS L2-to-L3 Starterless
  39. MIS Ground-to-Mid-Elevated L3 Starterless
RHW Width Transitions ButtonWidth Transition Puzzle Pieces (located under the Highways Menu)

These puzzle pieces allow for transitions between two different widths of RHW networks. They generally have starter drag end stubs. The transition allowing the DDRHW-4 to connect to the L1 and L2 RHW-4 is located here as well (as it entails a change of tile width).

  1. RHW-2-to-RHW-4 Transition A
  2. RHW-2-to-RHW-4 Transition B
  3. RHW-4-to-RHW-6S Transition Style A
  4. RHW-6-to-8 Transition Style A
  5. RHW-8-to-10 Transition Style A
  6. RHW-4-to-6C Transition A
  7. RHW-4-to-6C Transition B
  8. RHW-6C-to-6S Transition A
  9. RHW-6C-to-6S Transition B
  10. RHW-8S to RHW-8C Symmetrical Transition
  11. RHW-8S to RHW-8C Compact Transition
  12. RHW-6C to RHW-8C transition
  13. RHW-6C-to-8S Transition
  14. RHW4-to-MIS Transition
  15. RHW-2-to-3 Transition
  16. RHW-2-to-WRHW-2 Transition
  17. WRHW-2-to-RHW-3 Transition
  18. RHW-3-to-RHW-4 Transition A1/A2
  19. RHW-3-to-RHW-4 Transition B1/B2
  20. L1 RHW-4-to-RHW-6S Transition Style A
  21. L1 RHW-6S-to-8S Transition Style A
  22. L1 RHW-8S-to-10S Transition Style A
  23. L1 RHW-6C-to-8C Transition
  24. L1 RHW4-to-MIS Transition
  25. L2 RHW-4-to-RHW-6S Transition Style A
  26. L2 RHW-6S-to-8S Transition Style A
  27. L2 RHW-8S-to-10S Transition Style A
  28. L2 RHW-6C-to-8C Transition
  29. L2 RHW4-to-MIS Transition
  30. DDRHW-4-to-Dual-RHW-4 (L1/L2) Connector
Width Transitions 1 Width Transitions 2 Width Transitions 3 Width Transitions 4 Width Transitions 5 Width Transitions 6
RHW FLEXFly ButtonFLEXFly Pieces (located under the Highways Menu)

These FLEX pieces allow for construction of flyover ramps.

  1. FLEXFly MIS L0 90-Degree (Type A1)
  2. FLEXFly MIS L0 90-Degree (Type A2)
  3. FLEXFly MIS L0 45-Degree (Type B1)
  4. FLEXFly MIS L0 45-Degree (Type B2)
  5. FLEXFly MIS L1 90-Degree (Type A1)
  6. FLEXFly MIS L1 90-Degree (Type A2)
  7. FLEXFly MIS L1 45-Degree (Type B1)
  8. FLEXFly MIS L1 45-Degree (Type B2)
  9. FLEXFly MIS L2 90-Degree (Type A1)
  10. FLEXFly MIS L2 90-Degree (Type A2)
  11. FLEXFly MIS L2 45-Degree (Type B1)
  12. FLEXFly MIS L2 45-Degree (Type B2)
  13. FLEXFly RHW-4 L0 90-Degree (Type A1)
  14. FLEXFly RHW-4 L0 90-Degree (Type A2)
  15. FLEXFly RHW-4 L0 45-Degree (Type B1)
  16. FLEXFly RHW-4 L0 45-Degree (Type B2)
  17. FLEXFly RHW-4 L1 90-Degree (Type A1)
  18. FLEXFly RHW-4 L1 90-Degree (Type A2)
  19. FLEXFly RHW-4 L1 45-Degree (Type B1)
  20. FLEXFly RHW-4 L1 45-Degree (Type B2)
  21. FLEXFly RHW-4 L2 90-Degree (Type A1)
  22. FLEXFly RHW-4 L2 90-Degree (Type A2)
  23. FLEXFly RHW-4 L2 45-Degree (Type B1)
  24. FLEXFly RHW-4 L2 45-Degree (Type B2)

RHW Curves ButtonRHW Curve Pieces (located under the Highways Menu)

These pieces allow you to build smoother curves.

  1. RHW-4 Double Curve
  2. RHW-4 Outer Curve
  3. RHW-4 Inner Curve
  4. RHW-4 Lane Shift
  5. RHW-4 Dual Lane Shift
  6. FLEX-MRC R2 45
  7. FLEX-MRC R2 90
  8. FLEX-MRC R3 45
  9. FLEX-MRC R4 45
  10. FLEX-MRC R5 45
  11. MIS S-Curve 1
  12. MIS 45-Curve 1
  13. MIS 45-Curve 2
  14. MIS 90-Curve
  15. RHW-2 S-Curve
  16. RHW-2 45-Curve
  17. RHW-2 90-Curve (Large)
  18. RHW-2 90-Curve (Small)
  19. RHW-3 S-Curve 1
  20. RHW-3 S-Curve 2
  21. RHW-3 45-Curve 1
  22. RHW-3 45-Curve 2
  23. RHW-6S Single Lane Shift
  24. RHW-6S Dual Lane Shift
  25. RHW-6S Outer Curve
  26. RHW-6S Inner Curve
  27. RHW-8S Outer Curve
  28. RHW-8S Inner Curve
  29. RHW-6C S-Curve Half
  30. RHW-8C S-Curve Half
  31. RHW-10 Outer Curve
  32. RHW-10 Inner Curve
FARHW ButtonFractional Angle RHW (FARHW) Pieces (located under the Highways Menu)

These pieces allow one to build RHW networks at fractional angles (18.4/71.6) in puzzle piece form.

  1. FARHW-2 Straight
  2. FARHW-2 Short Curve
  3. FARHW-2 Long Curve
  4. FARHW-2 Diagonal to FARHW-2 Curve
  5. FARHW-4
  6. Dual FARHW-4
  7. FARHW-4 Short Curve outer
  8. FARHW-4 Short Curve inner
  9. Dual FARHW-4 Short Curve
  10. FARHW-4 to Diag Curve outer
  11. FARHW-4 to Diag Curve inner
  12. Dual FARHW-4 to Diag Curve
  13. FARHW-6S Short Curve outer
  14. FARHW-6S Short Curve inner
  15. FARHW-6S
  16. FARHW-6S to Diag Curve outer
  17. FARHW-6S to Diag Curve inner
  18. FARHW-6C Short Curve
  19. FARHW-6C to Diagonal RHW-6C Curve
  20. FARHW-6C Half Straight Piece
  21. FARHW-8C Short Curve
  22. FARHW-8C to Diagonal RHW-8C Curve
  23. FARHW-8C Half Straight Piece
  24. FAMIS-1
  25. FAMIS-FAMIS 143deg Curve
  26. FAMIS Short Curve outer
  27. FAMIS Short Curve inner
  28. FAMIS to Diag Curve inner
  29. FAMIS to Diag Curve outer
  30. FAMIS Long Curve small outer
  31. FAMIS Long Curve small inner
FARHW Ramps ButtonFractional Angle RHW (FARHW) Ramp Interfaces (located under the Highways Menu)

These pieces allow one to build the Type C and Type F ramp interfaces, in puzzle piece form.

  1. RHW-2 Type C1
  2. RHW-2 Type C1 Dual
  3. RHW-4 Type C1
  4. RHW-4 Type C1 Inside
  5. RHW-4 Type C1 diagonal
  6. RHW-4 Type F1
  7. RHW-4 Type F1 diagonal
  8. RHW-6S Type C1
  9. RHW-6S Type C1 diagonal
  10. RHW-6S Type C2
  11. RHW-6S Type F1
  12. RHW-6S Type F1 diagonal
  13. RHW-6C Type C1
  14. RHW-6S Type F2
  15. RHW-8S Type C1
  16. RHW-8S Type F1
  17. RHW-8C Type F1
  18. RHW-8S Type C2
  19. RHW-8C Type C2
  20. RHW-8S Type F2
  21. RHW-10S Type F1
  22. RHW-10S Type C2
  23. RHW-10S Type F2
  24. RHW-10S Type C3
  25. MIS/FAMIS Ramp Type C1 - out
FARHW Int ButtonFractional Angle RHW (FARHW) Intersections and Transitions (located under the Highways Menu)

These pieces allow one to build width transitions and intersections involving Fractional Angle RealHighways (FARHWs), in puzzle piece form.

  1. FA MIS-to-RHW-4 Trans A
  2. FA MIS-to-RHW-4 Trans B
  3. Fractional Angle Diamond M4A Full (arranged in increasing width)
  4. Fractional Angle Diamond 44A Full
  5. Fractional Angle Diamond 44B Full
  6. Fractional Angle Diamond 64B Full
  7. Fractional Angle Diamond M4 TuLEPless Full (also arranged in increasing width)
  8. Fractional Angle Diamond 44 TuLEPless Full
  9. Fractional Angle Diamond 44A Halves
  10. Fractional Angle Diamond M2A Full

These pieces allow you to manipulate the appearance of your RHW networks and transitions with fine control.

1-Tile CP Button1-Tile Cosmetic Puzzle Pieces (located under the Highways Menu)
  1. RHW-2 CP Dash Orth
  2. RHW-2 CP SolDash Dash Orth
  3. RHW-2 CP Dash LRA Dash Orth
  4. RHW-2 CP Dash Diag
  5. RHW-2 CP SolDash Diag
  6. RHW-2 CC Dash S-curve
  7. RHW-2 CC Dash 45-curve
  8. RHW-2 CC Dash 90-curve
  9. RHW-2 CC Dash 18-curve
  10. RHW-2 CC Dash 72-curve
  11. RHW-2 CC Dash 27-curve
  12. RHW-2 CC FARHW Dash
  13. RHW-2 CCFARHW SolDash1
  14. RHW-2 CC Curve SolDash2
  15. RHW-3 CP RM LRA IN
  16. RHW-3 CP RM TpA OUT 1
  17. RHW-3 CP RM TpA OUT 2
  18. RHW-3 CP BM1 UM
  19. RHW-3 CP BM1 LRA IN
  20. RHW-3 CP BM1 EA
  21. RHW-3 CP BM1 EA + TrA
  22. RHW-3 CP DS1 UM
  23. RHW-3 CP DS1 LRA IN
  24. RHW-3 CP BM1 EA in
  25. RHW-3 CP BM1 EA+TrA in
  26. RHW-3 CP BM1 SpA in
  27. RHW-3 CP SM1 UM
  28. RHW-3 CP SM1 EA in
  29. RHW-3 CP SM1 EA+TrA in
  30. RHW-3 CP SM1 SpA
  31. RHW-3 x RHW-2 TuLEP intersection
  32. RHW-3 x RHW-3 TuLEP intersection
  33. RHW-3 x WRHW-2 TuLEP intersection
  35. RHW-4 CP RM LRA IN
  36. RHW-4 CP RM TpA OUT
  37. RHW-4 CP RM TpA IN
  38. RHW-4 CP RM TrA
  39. RHW-4 CP BM1 UM
  40. RHW-4 CP BM1 LRA OUT
  41. RHW-4 CP BM1 LRA IN
  42. RHW-4 CP BM1 EA OUT
  44. RHW-4 CP BM1 SpA OUT
  45. RHW-4 CP DS1 UM
  46. RHW-4 CP DS1 LRA IN
  47. RHW-4 CP DS1 EA OUT
  49. RHW-4 CP SD1 UM
  50. RHW-4 CP SD1 LRA IN
  51. RHW-4 CP Transition NEL
  52. RHW-4 CP NEL Single UM
  53. RHW-4 CP NEL LRA
  54. RHW-4 CP NEL EA
  55. RHW-4 CP NEL EA+TrA
  56. RHW-4 CP ROP Type A1
  57. RHW-4 CP ROP Type B1
2-Tile CP Button2-Tile Cosmetic Puzzle Pieces (located under the Highways Menu)
  4. RHW-6S CP UM TpA IN
  5. RHW-6S CP UM TrA
  6. RHW-6S CP BM1 UM
  9. RHW-6S CP BM1 EA + TrA OUT
  10. RHW-6S CP BM1 Ea + TpA OUT
  11. RHW-6S CP BM2 UM
  12. RHW-6S CP BM2 LRA IN
  13. RHW-6S CP BM2 EA IN
  14. RHW-6S CP BM2 EA + TrA IN
  15. RHW-6S CP DS1 UM
  16. RHW-6S CP DS1 EA OUT
  17. RHW-6S CP DS1 EA + TrA OUT
  18. RHW-6S CP DS1 Ea + TpA OUT
  19. RHW-6S CP DS2 UM
  20. RHW-6S CP DS2 LRA IN
  21. RHW-6S CP SD1 UM
  25. RHW-8S CP UM TpA OUT
  26. RHW-8S CP UM TrA
  27. RHW-8S CP BM1 UM
  29. RHW-8S CP BM1 EA OUT
  30. RHW-8S CP BM1 EA + TrA OUT
  31. RHW-8S CP BM1 Ea + TpA OUT
  32. RHW-8S CP BM2 UM
  33. RHW-8S CP BM2 EA OUT
  34. RHW-8S CP BM2 EA + TrA OUT
  35. RHW-8S CP BM3 UM
  36. RHW-8S CP BM3 LRA IN
  37. RHW-8S CP DS1 UM
  38. RHW-8S CP DS1 EA OUT
  39. RHW-8S CP DS1 EA + TrA OUT
  40. RHW-8S CP DS1 Ea + TpA OUT
  41. RHW-8S CP DS2 UM
  42. RHW-8S CP DS2 EA OUT
  43. RHW-8S CP DS2 EA + TrA OUT
  44. RHW-8S CP DS3 UM
  45. RHW-8S CP DS3 LRA IN
  46. RHW-8S CP SD1 UM
  49. RHW-10S CP UM LRA IN
  50. RHW-10S CP UM TpA OUT
  51. RHW-10S CP UM TrA
  52. RHW-10S CP BM1 UM
  53. RHW-10S CP BM1 LRA OUT
  54. RHW-10S CP BM1 EA OUT
  55. RHW-10S CP BM1 EA + TrA OUT
  56. RHW-10S CP BM1 Ea + TpA OUT
  57. RHW-10S CP BM2 UM
  58. RHW-10S CP BM2 EA OUT
  59. RHW-10S CP BM2 EA + TrA OUT
  60. RHW-10S CP BM3 UM
  61. RHW-10S CP BM3 LRA IN
  62. RHW-10S CP DS1 UM
  63. RHW-10S CP DS1 EA OUT
  64. RHW-10S CP DS1 EA + TrA OUT
  65. RHW-10S CP DS1 Ea + TpA OUT
  66. RHW-10S CP DS2 UM
  67. RHW-10S CP DS2 EA OUT
  68. RHW-10S CP DS2 EA + TrA OUT
  69. RHW-10S CP DS3 UM
  70. RHW-10S CP DS3 LRA IN
  71. RHW-10S CP SD1 UM
  72. RHW-10S CP SD1 LRA OUT
3-Tile CP Button3-Tile Cosmetic Puzzle Pieces (located under the Highways Menu)
  4. RHW-6C CP UM TrA
  5. RHW-6C CP BM2 UM
  7. RHW-6C CP BM2 EA IN 1
  8. RHW-6C CP BM2 EA IN 2
  9. RHW-6C CP SD2 UM
  11. RHW-6C CP HOV UM
  12. RHW-6C CP HOV M
  14. RHW-8C CP UM TpA OUT
  15. RHW-8C CP UM TrA
  16. RHW-8C CP BM1 UM
  18. RHW-8C CP BM1 EA OUT
  19. RHW-8C CP BM1 EA+TrA OUT
  20. RHW-8C CP BM1 EA+TpA OUT
  21. RHW-8C CP DS1 UM
  22. RHW-8C CP DS1 EA OUT
  23. RHW-8C CP DS1 EA+TrA OUT
  24. RHW-8C CP DS1 EA+TpA OUT
  25. RHW-8C CP DS1 UM
  26. RHW-8C CP DS1 EA OUT
CP Transition ButtonCosmetic Transition Puzzle Pieces (located under the Highways Menu)
  1. RHW-4-to-RHW-6S Transition BM1
  2. RHW-4-to-RHW-6S Transition BM2
  3. RHW-4-to-RHW-6S Transition LRA
  4. RHW-6S-to-RHW-8S Transition BM1
  5. RHW-6S-to-RHW-8S Transition BM2
  6. RHW-6S-to-RHW-8S Transition LRA
  7. RHW-8S-to-RHW-10S Transition BM1
  8. RHW-8S-to-RHW-10S Transition BM2
  9. RHW-8S-to-RHW-10S Transition LRA
  10. RHW-6C-to-RHW-8C Transition BM1
  11. RHW-3 CP Transition BM1
NC ButtonRHW Neighbor Connectors (located under the Highways Menu)

These pieces allow you to build properly functioning Neighbor Connections with RHWs beyond the base RHW-2 (Neighbor Connectors are also not needed for RHW-3 and Double-Decker RHW-4 connections).

  1. RHW Invisible Loop Connector
  2. RHW-4 Neighbor Connector
  3. MIS Neighbor Connector
  4. RHW-6S Neighbor Connector
  5. ERHW-4 Neighbor Connector
  6. RHW-8S Neighbor Connector
  7. RHW-10 Neighbor Connector
  8. EMIS Neighbor Connector
  9. RHW-6C Neighbor Connector
  10. RHW-8C Neighbor Connector
  11. ERHW-6S Neighbor Connector
  12. ERHW-6C Neighbor Connector
RHW/Road ButtonRoad/RHW Puzzle Pieces and FLUPs (located under the Roads Menu)

These puzzle pieces extend the NAM Elevated Road Puzzle Pieces to allow you to cross RHW networks. It also contains the current set of RHW FLUPs pieces. For most instances, use of the Draggable Elevated Road Viaducts is recommended instead.

  1. Road-over-RHW-4 Orthogonal/Orthogonal
  2. Road-over-RHW-4 Diagonal/Orthogonal
  3. Road-over-RHW-4 Orthogonal/Diagonal
  4. Road-over-RHW-4 Diagonal/Diagonal
  5. Road-over-RHW-2 Orthogonal/Orthogonal
  6. Road-over-RHW-2 Diagonal/Orthogonal
  7. Road-over-RHW-2 Orthogonal/Diagonal
  8. Road-over-RHW-2 Diagonal/Diagonal
  9. Road-over-MIS Ramp Orthogonal/orthogonal
  10. Road-over-RHW-6S Orthogonal/Orthogonal
  11. Road-over-RHW-6C Orthogonal/Orthogonal
  12. Road-over-RHW-8S Orthogonal/Orthogonal
  13. Road-over-RHW-8C Orthogonal/Orthogonal
  14. Road-over-RHW-10S Orthogonal/Orthogonal
  15. Road-over-RHW-3 Orthogonal/Orthogonal
  16. Elevated Road/EMIS +-Intersection
  17. Elevated Road/EMIS T-Intersection
  18. FLUPs Underpass-Under RHW-MIS/RHW-2/RHW-4/RHW-6C
  19. FLUPs Underpass-Under RHW-6S/RHW-8S/RHW-10
  20. FLUPs RHW-2 Ramp
RHW/OWR ButtonOne-Way Road (OWR)/RHW Puzzle Pieces (located under the Roads Menu)

These puzzle pieces extend the NAM Elevated One-Way Road Puzzle Pieces to allow you to cross RHW networks. For most instances, use of the Draggable Elevated One-Way Road Viaducts is recommended instead.

  1. OWR-over-RHW-4 Orthogonal/Orthogonal
  2. OWR-over-RHW-2 Orthogonal/Orthogonal
  3. OWR-over-MIS Ramp Orthogonal/Orthogonal
  4. OWR-over-RHW-6S Orthogonal/Orthogonal
  5. OWR-over-RHW-6C Orthogonal/Orthogonal
  6. OWR-over-RHW-8S Orthogonal/Orthogonal
  7. OWR-over-RHW-8C Orthogonal/Orthogonal
  8. OWR-over-RHW-10S Orthogonal/Orthogonal
  9. OWR-over-RHW-3 Orthogonal/Orthogonal
  10. Elevated OWR/EMIS +-Intersection
  11. Elevated OWR/EMIS T-Intersection
RHW/AVE ButtonAvenue/RHW Puzzle Pieces and FlexSPUI (located under the Roads Menu)

These puzzle pieces extend the NAM Elevated Avenue Puzzle Pieces to allow you to cross RHW networks. It also contains the Single-Point Urban Interchange (SPUI) and Diverging Diamond Interchange (DDI) intersection pieces. For most instances, use of the Draggable Elevated Avenue Viaducts is recommended instead.

  1. Avenue-over-RHW-4 Orthogonal/Orthogonal
  2. Avenue-over-RHW-2 Orthogonal/Orthogonal
  3. Avenue-over-MIS Ramp Orthogonal/Orthogonal
  4. Avenue-over-RHW-6S Orthogonal/Orthogonal
  5. Avenue-over-RHW-6C Orthogonal/Orthogonal
  6. Avenue-over-RHW-8S Orthogonal/Orthogonal
  7. Avenue-over-RHW-8C Orthogonal/Orthogonal
  8. Avenue-over-RHW-10S Orthogonal/Orthogonal
  9. Avenue-over-RHW-3 Orthogonal/Orthogonal
  10. Avenue/MIS +-Intersection Avenue/MIS T-Intersection
  11. Avenue Type A1 RHW-MIS Exit/Entrance Ramp
  12. Avenue Type B1 RHW-MIS Exit/Entrance Ramp
  13. Avenue Type C1 RHW-MIS Exit/Entrance Ramp
  14. Diverging Diamond-Avenue
  15. FlexSPUI Avenue Type A
1-Tile CP ButtonHeavy Rail/RHW Puzzle Pieces (located under the Rails Menu)

These puzzle pieces extend the old pre-RealRailway NAM Rail Viaduct set to allow one to cross RHW networks. Note that these pieces are largely deprecated at this point, with the addition of the Draggable Elevated RealRailway (RRW) Viaducts, and are not recommended for use with the RealRailway system.

  1. Rail-over-RHW-4 Orthogonal/Orthogonal
  2. Rail-over-RHW-2 Orthogonal/Orthogonal
  3. Rail-over-MIS Ramp Orthogonal/Orthogonal
  4. Rail-over-RHW-6S Orthogonal/Orthogonal
  5. Rail-over-RHW-6C Orthogonal/Orthogonal
  6. Rail-over-RHW-8S Orthogonal/Orthogonal
  7. Rail-over-RHW-8C Orthogonal/Orthogonal
  8. Rail-over-RHW-10S Orthogonal/Orthogonal
  9. Rail-over-RHW-3 Orthogonal/Orthogonal

 Region Transport View Support for RealHighway Networks

The NAM includes the popular RHW Regional Transport Map Mod by jondor as an optional feature, which can be selected via this option in the NAM Installer. This mod utilizes a workaround to display RHWs on the Regional Transport Map. It also contains an updated and expanded map legend to reflect the new network colors as well as the addition of Monorail as a separate color from El-Rail/GLR. This mod is NOT compatible with any other Regional Transport Map mods.

There is one requirement for the mod to function correctly: You MUST activate at least one dataview in game before saving for the game to render the map correctly. It does not appear that this issue can be fixed.

After instalation, each city tile must be opened and saved (after opening any dataview) in order to update the region map. Similarly when uninstalling the mod, each city tile must be resaved to update the region map.


Q: Why are highways black instead of red?
A: Because of the way this workaround functions, the red color would show up as a halo around diagonal roads, bridges and certain puzzle pieces. The black color does as well, but is less noticable.

Q: Why do the diagonals look weird?
A: Again, because of the way this workaround functions, the diagonal roads, avenues and streets show up intermingled with the highway color. This is not possible to fix but the map colors were chosen to make it less noticable than other color combinations.

Q: Why are all my roads black?
A: If you do not open any of the dataviews before saving the game, the map will be rendered incorrectly resulting in all car traffic networks showing up as the highway color.

Q: Will you make a version with my favorite colors?
A: Sorry, but no. Anyone who can use iLive's Reader can easily change the colors to their liking.

 Other Known Issues

 Information on Support and Development Updates

For technical support and information on new features coming to the RealHighway system in future releases, please check out the official RealHighway (RHW) - Development and Support threads on the forums at SimCity 4 Devotion and Simtropolis.