Why is fatigue a greater risk during night driving than during the day for many drivers?

Pick an answer

1. Nighttime driving always includes less traffic, which somehow increases tiredness
2. Vehicles use more fuel at night, which is unrelated to alertness but often assumed to cause fatigue
3. Fatigue only affects drivers during daytime hours
4. Night hours often fall during a driver's natural low point for alertness, even with adequate rest

Correct!

Not quite. The correct answer is highlighted.