¿Cuál de estos factores aumenta la fatiga al conducir?

The correct answer is congestion and traffic jams, a factor that increases fatigue when driving. According to the regulations, fatigue is a factor that can alter the driver's physical and mental fitness and increase the risk of road crashes. Congestion causes stress and makes the driver spend longer at the wheel without adequate rest, which increases the chance of drowsiness and reduces attention. This is in line with the rules that stress the importance of preventing fatigue and taking adequate rest breaks while driving.