There is no need to do this. Duisburg is a unique city, he and the road of fools keeps me in this game. By removing the collision there, you kill this unique place. This is the only place where I am in traffic and I love it. Do not turn the simulator game into a casual game, especially on the "Sumulator" server. Instead of adding collision to the entire city, you could add a temporary collision deactivation when leaving the auto shop so that players can pass the traffic lights and leave the city.