Looks like a good reason to avoid multiplayer. Not that the AI is any better. Had this brilliant bit of AI driving in front of me earlier today - two AI trucks playing silly b*****s up the steepest hill on the Scandinavia map. One crawls almost to a halt. So the other one tries to pass, and likewise runs out of grunt. They proceeded side-by-side all the way up the hill at walking pace. And then over the top not much faster. It was probably just as well I was behind them, rather than coming the other way.