There is not much that can go wrong while driving in a straight line at constant speed. The actions they take to get around you (braking, lane changes) create a

There is not much that can go wrong while driving in a straight line at constant speed. The actions they take to get around you (braking, lane changes) create a great deal more opportunities for collision. Speed doesn't kill, speed differentials do. You should not go drastically slower than the speed of traffic for the same reason you shouldn't go drastically faster than it.