Referring back to your diagram I also have to admit that this problem is somewhat unavoidable. But I'm not sure how well the AI would handle custom lane assignments. It's simply not possible, unless you find a mod that does exactly that. But in the vanilla game, that is not possible. What you might want to do is have the two rightmost lanes be 'turn right', and the leftmost lane be 'turn left/go straight'. However, it does not take traffic flow into account.Ĭontinuing our example suppose that 95% of traffic (coming from the 6-lane road) will turn right, maybe because that's the entrance to a huge industrial zone.Īt no point will the game change the distribution of lanes to match the traffic flow. If you look at the lanes of the 6-lane road, you will see that the three lanes are now changed into a turn left/go straight/turn right setup. 3 of the roads are two-way 2-lane roads, and the other one is a two-way 6-lane road. By adding an intersection to an otherwise straight multilane road), the existing lanes will be divided into straight/turn left/turn right lanes.Ī simple example: Make a 4 way intersection. The main problem that Cities Skylines has (in regards to your question), is that you cannot control lane usage. While definitely not the most efficient it is very realistic. First of all, I work near a multi-lane roundabout and your image is spot on for how traffic flows there every single day.

Cities skylines tmpe roundabouts