Which statement is not true regarding driver fatigue?

The statement that pulling over to take a nap will not reduce drowsiness is not true. In fact, taking a short nap can be an effective way to alleviate drowsiness while driving. When a driver recognizes that they are fatigued, pulling over and resting can help restore alertness and improve reaction times.

On the other hand, the other statements accurately reflect the realities of driver fatigue. Fatigue indeed leads to slower reaction times because the brain becomes less responsive when a person is tired. Additionally, drowsiness can occur even on short drives since fatigue is not solely determined by the duration of travel. Finally, night driving increases the effects of fatigue due to the body's natural circadian rhythms, which typically promote sleepiness during nighttime hours.