Also, they all seem to be changing objectives and speed at random. In my experience (European highways), it's usually pretty easy to categorize other cars into different patterns of behaviour, such as "wants to move as fast as possible", "wants to save gas by staying below the speed limit, preferrably right behind a truck" or "trying to maintain preferred speed, changing lanes as needed". Also, most cars will act in a fairly safe and rational way: avoid tailgating, signal before lane changes, maintain speed and lane unless there is a good reason to change, try to stay clear of other cars which they find unsafe. It's an interesting system, actually, and one which is very much based upon experience and intuition.

By contract, the cars in the simulation seem to change lanes and velocities all willy nilly. All of them flip my bozo bit and my intuitive reaction would be to position myself to take the closest possible exit ...