What headlights should a driver use when driving in foggy conditions?

Using low beams when driving in foggy conditions is crucial for maintaining visibility and safety. Fog creates a unique situation where light from high beams can scatter and reflect back into the driver's eyes, leading to decreased visibility rather than improved. Low beams are designed to provide adequate illumination of the road directly in front of the vehicle without causing excessive glare that can occur with high beams.

In fog, low beams help to penetrate the moisture in the air and allow the driver to see the road and surrounding obstacles more clearly. This is especially important because it prevents the light from reflecting off the fog, rain, or snow, which can create a wall of bright light that obscures visibility.

Other options, such as flashers and parking lights, are not suitable for driving in fog as they do not provide the necessary illumination for the driver's visibility on the road. Flashers are primarily used to indicate a vehicle’s presence or warn others of a potential hazard rather than to provide guidance on the road ahead. Parking lights are even less effective, being designed for a parked vehicle rather than for aiding visibility when driving. Therefore, the best practice in foggy conditions is to utilize low beams to ensure a safer driving experience.