I'm not entirely sure if this has been said but the AI dodge things on the side of the road. I was trying to make a infinite traffic loop on this highway map and the AI keep on swerving to the street lamps in the middle of the highway, even simply as the railings on the highway they would swerve that too even though its going in a straight line. some vehicles do work but most swerve... and if there is a option to disable the detection for objects then i haven't found it yet...