1. No Traffic
The best thing about open-world driving games (think Burnout Paradise) is not the turbo, nor the ability to walk away from a horrible-yet-badass crash: It's the fact that there are barely any cars on the road. Sure, there might be some other vehicles, and in some games there are actually working stoplights, but it's hard to imagine a game where there is bumper-to-bumper traffic trying to get off the highway.
And with good reason. Traffic is miserable. If human motorists drove like their NPC counterparts calmly, methodically, programmed to drive at the same pace and leave a safe following distance between cars, not only would road rage decline, but so would the majority of traffic collisions. Except for ones caused by turbo strips, of course.