What is the legal requirement for headlights during daylight hours when conditions are poor?

The legal requirement for headlights during daylight hours when conditions are poor is that headlights must be on if visibility is less than 500 feet. This requirement is in place to ensure that drivers can see the road ahead and are visible to other drivers, thereby reducing the risk of accidents in low visibility conditions such as rain, fog, or snow. Visibility can greatly diminish during these times, and turning on headlights enhances safety by improving awareness for both the driver and other vehicles on the road.

Using headlights in poor visibility conditions helps to delineate your vehicle's position and improves reaction times for other drivers. Understanding this rule highlights the importance of adapting driving practices to accommodate varying weather conditions, ensuring a safer driving environment for everyone.

The other options reflect misunderstandings or lack of adherence to safe driving practices during adverse conditions. For instance, headlights are not optional when visibility is compromised, and using high beams in fog can create glare that worsens visibility rather than improving it. Similarly, headlights should not be off during the day in poor conditions; they are essential for maintaining visibility.