Traffic jam? This won’t happen here… the traffic may be filled by many cars but you always have place to avoid collisions.
The goal isn’t in getting somewhere but you have to fulfill all the tasks given and move to the next map. The world is nice 3D and you will visit bridges, cities and more interesting locations. But the other cars aren’t your only problem. You often meet obstacles slowing you down. Try to avoid them and don’t forget reading the tasks.