订阅以下载
Texas Style Frontage Road Overpass

This overpass (though fairly large) represents the concept utilized in parts of North Texas, specifically Plano,TX for controlling traffic onto and off of the highway.

I tried to stay true to life, though for practicality I would probably swap the 2 lane roads for 2 lane oneway roads to decrease the traffic load. In real life, the overpassing road is divided and only feeds one side. Granted I could create a series of one way roads to simulate it, but that's overkill imo.

The example pictures were taken with a city about 30k in size, and only produced red when the light only lets 2 cars through. Note I did, for playtesting, replace the 2lane roads to 2lane Oneway roads and it works fairly well.

Also putting buildings on the Frontage road is fine, I just wouldn't put any buildings between the offramp and the road to the road going to the overpass.