When is a driver required to turn on their headlights?

Answer: B — When visibility is less than 500 feet

A driver is required to turn on their headlights when visibility is less than 500 feet. This requirement is in place to ensure that the driver can see the road and obstacles clearly and that other drivers can see the vehicle, enhancing overall safety. Poor visibility conditions can arise from various factors, including rain, fog, snow, or daytime conditions where light is inadequate. While specific times and places, such as nighttime or residential areas, might seem to govern when headlights should be used, the crucial aspect is the visibility factor. Even during daylight hours, if visibility drops below 500 feet, headlights are necessary to alert other road users to the driver’s presence and improve safety.