Driving at night is more dangerous than during the day. One of the obvious reasons is darkness. Ninety percent of a driver's reaction depends on vision, and vision is severely limited at night. Depth perception, color recognition and peripheral vision are compromised after sundown. Fatigue also adds to the danger of night driving.
Drowsiness makes driving more difficult by dulling concentration and slowing reaction time.
Alcohol is the single most significant factor in fatal traffic crashes, playing a part in more than half of all motor vehicle-related deaths. That makes weekend nights more dangerous. More fatal crashes take place on Friday and Saturday nights than at any other time in the week. Clean headlights, taillights, signal lights and windows once a week, more often if necessary. Aim your headlights properly.