I’m creating an animation of a roundabout and have run into issues creating the road network. My initial thought was to create a closed loop set as Primary priority for the roundabout and have the entrance/exit legs as intersections without traffic signals and set as Secondary priority. In practice, I had a very difficult time with vehicles wandering out of the loop and driving off in random directions. I initially thought the numerous intersections were the issue, so I started from scratch with just a loop with a vehicle count of 1 and that vehicle would leave the road and go wandering off.
Eventually, I sort of got things to work by patching together two primary through lanes with multiple secondary entrances/exits, and I joined the two paths with some short secondary segments to create a loop. This mostly works, but there are a few instances where vehicles inside the roundabout yield to vehicles entering the roundabout due to the way I had to set up the various primary/secondary paths. It would be ideal to have just the roundabout as a closed loop with primary priority and everything else with a secondary priority.
I saw the roundabout example in the documentation, but that layout does not follow the designs of most roundabouts I’ve seen in the US: a relatively small circular loop with entrance/exit legs intersecting it at various angles.
Any suggestions on how best to layout a network for this style of roundabout?
