When should a CDL driver use their headlights?

Using headlights in adverse weather conditions and at night is crucial for ensuring safety on the road. Headlights enhance visibility not just for the driver but also for other road users. During nighttime, headlights illuminate the roadway, allowing the driver to see potential hazards, signs, and other vehicles.

Additionally, in adverse weather conditions such as rain, fog, snow, or sleet, visibility is often compromised. In such situations, headlights are essential to improve the driver's ability to see and be seen; they help drop light onto the road and through the weather that may obstruct clear sight. This practice is further supported by laws in many jurisdictions that require the use of headlights in such conditions, enhancing overall road safety.

Other options focus on limited scenarios that do not encompass the full scope of situations where headlights are needed. For example, using headlights only at night or only during the day if visibility is reduced does not account for important circumstances where headlights should be employed for the safety of all road users. Choosing to limit headlight use unnecessarily can lead to dangerous situations, especially when driving under conditions that warrant increased visibility.