Which headlights should a school bus driver turn on to increase visibility during rain or snow?

Using low beam headlights during rain or snow is essential for maintaining visibility and ensuring safety on the road. Low beams are designed to provide adequate illumination for the driver without creating glare for oncoming traffic or reflecting off precipitation, which can obscure visibility.

In adverse weather conditions like rain or snow, the water or snowflakes in the air can reflect light from high beams back toward the driver, creating a blinding effect. This makes it harder to see the road and any obstacles. Low beam headlights, on the other hand, cast a beam that is closer to the ground, improving visibility of the road surface and reducing glare.

Fog lights, while helpful in foggy conditions by illuminating the road immediately in front of the vehicle, are not sufficient on their own for general driving in rain or snow. Daytime running lights can enhance visibility from other motorists' perspectives but do not provide the necessary forward illumination required in poor weather conditions. Therefore, turning on low beam headlights is the standard practice to help ensure safety and visibility during rainy or snowy weather while driving a school bus.