Mass Traffic crossroads

Hello everyone! I need some help. I’m having trouble understanding how to set up the traffic flow at an intersection in Mass Traffic. The vehicle movement itself is working fine, but there is confusion at the intersections. Is there any documentation available on how to properly configure traffic lights at intersections? I don’t necessarily need to place the traffic lights themselves; I just want to ensure that the rules at the intersection are followed. If anyone has any information, I would be greatly appreciative of your assistance.