Hello, here: Traffic Simulator there is a Traffic Simulator. But this thing needs Java. On the website you can simulate different traffic situations and observe how traffic jams arise. My results: Speed limits do not help against traffic jams. Good against traffic jams are powerful motors. The main cause of traffic jams are travel delays if there was a stagnation somewhere. This is proven: Our thick ships are good for traffic. Oh yes: The biggest ones By the way, there are overtaking trucks and approaching trucks. Followed by small cars with weak engines. Followed by ruthless drivers. Greetings