In the later game we all have issues with traffic, but don’t you think the beings of this colony are too advanced for roads, trains and highways. These modes of transport should a basic method and there should be a futuristic one.
So why not have Matter Transporter upgrades to buildings or a Matter Transporter station. They will beam the hover lorry/cargo/people to another station or even directly to the building which has a transport upgrade.
If directly to buildings with this capability, then there would not be a requirement for a road to service the building. You have distance buildings with no roads sending goods directly to a destination.
That would solve the traffic issue in later game.