When must headlights be used during the day?

The correct answer indicates that headlights must be used during rain or bad weather. This regulation is rooted in safety considerations; using headlights in inclement weather improves visibility for the driver and helps other drivers see the vehicle, reducing the risk of collisions. When it is raining, foggy, or snowing, reduced visibility is common, and proper use of headlights is crucial to ensure safety on the road.

In many places, including Massachusetts, there are laws that dictate the conditions under which drivers must use their headlights, particularly to enhance visibility when natural light is insufficient due to adverse weather conditions. This practice helps to ensure that all vehicles on the road can see and be seen, thereby promoting safer driving environments.

Other options might have conditions where headlights are appropriate, but the specific requirement to use them during rain or bad weather is an essential safety rule that emphasizes the importance of visibility in challenging driving conditions.