Final answer:
To improve visibility caused by rain or fog, drivers should use their headlights or fog lights. Low beam headlights are recommended in rain, while fog lights are specifically designed for driving in foggy conditions.
Step-by-step explanation:
To improve visibility caused by rain or fog, drivers should use their headlights. This is because headlights not only help drivers see the road ahead, but they also make the vehicle more visible to other drivers. The use of headlights can greatly reduce the risk of accidents in low visibility conditions.
When driving in rain, it is recommended to use low beam headlights instead of high beams. High beams tend to reflect off the rain droplets and create glare, making it harder to see. Low beam headlights, on the other hand, provide better light penetration through the rain and improve visibility.
In foggy conditions, drivers should use their fog lights if their vehicle is equipped with them. Fog lights are specifically designed to cut through fog and improve visibility. They are mounted lower on the front of the vehicle to minimize glare and help illuminate the road directly in front of the car.