When must headlights be on?

Answer: B — Anytime weather conditions require windshield wipers

Headlights must be on anytime weather conditions require the use of windshield wipers. This rule is in place to enhance visibility for drivers as well as to make the vehicle more visible to others. In situations such as heavy rain, snow, or fog, visibility can be significantly reduced, and having headlights on improves safety for everyone on the road. In addition, using headlights during these weather conditions helps ensure compliance with traffic laws, as it is a requirement in many states, including South Carolina, to have headlights activated when wipers are in use. This practice is designed to mitigate the risks associated with poor visibility and to promote a safer driving environment. While headlights are commonly used at night, their use is not limited to nighttime driving. Heavy traffic and foggy conditions can certainly warrant the use of headlights, but the critical factor here is the relationship between windshield wipers and headlight use in adverse weather conditions.