could it be a good idea to add this in NAM, it would be great not having to traffic to merge into RHW than go into the Ground Highway,i think its a good idea to avoid bottlenecks &idea
It's been requested a few times, but it's not likely to happen anytime soon. It would probably require a fair bit of modeling work, and it's further complicated by the scaling issues, as the Maxis Highways are about 50% underscale compared to the rest of the transit networks in-game, including the RHW. Also, the transition required would probably take up as much space as the current workaround of RHW-6S/RHW-4 Transition-into-Maxis Highway, if not more, in order to compensate for the scaling.
Due to how the game handles capacity, as far as the traffic simulation is concerned, there's no real bottleneck. Any "bottleneck" that might actually occur would be the result of the transition from RHW to Maxis Highway technically being an "intersection" . . . and that would affect it the same regardless of the width of the RHW or the Maxis Highway.
-Alex