When is it mandatory to use headlights?

Answer: B — When visibility is low, such as at night or in adverse weather conditions

Using headlights is mandatory in conditions where visibility is low, which includes both nighttime driving and situations with adverse weather conditions such as rain, fog, or snow. Low visibility can significantly impair a driver’s ability to see the road, obstacles, and other vehicles, increasing the risk of accidents. By requiring headlights in these conditions, it enhances visibility not only for the driver but also for others on the road. This regulation helps ensure safer driving environments by making vehicles more visible to other road users. In contrast, using headlights only when it is dark outside does not account for the many scenarios where reduced visibility can occur even during daylight hours, such as in heavy rain or fog. Similarly, headlights are not limited to areas with high pedestrian traffic or to highway driving alone, as proper visibility is essential for safe driving in all environments and at all times when visibility is compromised.