Used the white lines trick to prevent the AI from arbitrarily attempt overtaking whenever they catch up with the slower ones. Now they form queues first and then overtake on specified parts of the course - the more straight bits. Looks more lifelike.
Addressed the issue of game crashing upon exit from the traffic with AI flood. Now it`s stable.
Due to less accidents there is the possibility of using all of the 39 AI`s for Track day traffic, with or without AI flood. If you want to minimize the accidents even more look for the "long queues.7z" in "..\content\tracks\fonteny\2way\ai\" and unpack the "fast_lane.ai" from it. Then you will get traffic that never attempts overtaking. In such case use of AI flood is very necessary to scatter the queues around you.