When is it unsafe to drive?

Driving while feeling tired or drowsy significantly impairs your ability to concentrate, react quickly, and make sound decisions on the road. Fatigue can make a driver less alert, increase reaction times, and lead to an increased risk of accidents. The National Highway Traffic Safety Administration has linked drowsy driving to a considerable number of crashes, highlighting the critical importance of being well-rested before getting behind the wheel.

While driving during peak traffic hours can be challenging due to congestion and increased stress, it does not inherently make driving unsafe if one is alert and responsive. Clear and sunny days typically present the best driving conditions, and the time of day, whether day or night, does not automatically affect safety—what matters is the driver's state of alertness and the surrounding conditions.