You write that you have improved the ai, in the last patch. But they have got much worse. They collide with each other all the time. And at every intersection they go into grid lock.
I'm am playing with the high traffic mod. It is so bad that i have gone back to the old files again.
Hope someone is reading this forum, it seems pretty silent in here. Have reported another bug, but no response at all :/
no that are the newest version so far. But i wrote your problem down and try to fix these Issues tomorrow. I hope its better than