I don't race but I have noticed this with my "normal" car, i've always driven a hatchback though which are quite common in this country. If I force myself to dr

I don't race but I have noticed this with my "normal" car, i've always driven a hatchback though which are quite common in this country. If I force myself to drive very steady I can almost feel the alertness drifting away, I become less aware of vehicles around me and their bearing. If I speed up to a threshold just between the bored comfortable zone and racing it's enough to give heightened alertness, I can easily preempt drivers making careless moves that would otherwise endanger me and I notice pedestrians and other things around the road more, it's a strange balance, but i've no doubt that sticking dead to the limit on a large road will decrease alertness in any study.