This might have been brought up before, but I am often encountering two bugs.
1) Pedestrians flood into the street and don't move when an incident happens, making me have to move them individually (believe this is an EM4 issue, not a mod issue)
2) Traffic gets really bad if you ever have to redirect them. They will get stuck turning from the left lane, causing major traffic issues. You cannot redirect them again since EM4 doesn't allow you to redirect traffic twice...