What is the main purpose of driving with headlights on in poor visibility?

The main purpose of driving with headlights on in poor visibility is to be more visible to other drivers. When visibility is limited due to conditions such as rain, fog, twilight, or nighttime driving, using headlights helps ensure that other motorists can see your vehicle. This visibility is crucial for safety, as it reduces the likelihood of collisions and enables other drivers to gauge your distance and speed more accurately.

Additionally, while being able to see further ahead is important, the primary goal in poor visibility conditions is to enhance your vehicle's visibility to others. Driving with headlights on does help improve your own sight of the road ahead to some extent, but it is primarily about ensuring that other drivers notice your presence. Similarly, while reducing glare can be a consequence of proper headlight use, it is not the main objective when driving in low visibility. Lastly, compliance with traffic laws is important, but the fundamental reason for using headlights in these conditions is centered around safety and visibility for all road users.