Alberta Motor Association (AMA) Learner’s Practice Exam

Using low beam headlights is the appropriate action when visibility is poor due to adverse weather conditions, such as fog, rain, or snow. Low beams are designed to provide adequate illumination of the road immediately in front of the vehicle without causing glare to oncoming drivers. This enhances safety by improving the driver's ability to see the road ahead and helps other drivers see your vehicle as well.

In contrast, high beam headlights can reflect off precipitation like rain or fog, creating glare that actually reduces visibility further rather than enhancing it. Speeding up in poor visibility conditions can compromise safety by reducing the driver's reaction time in case of obstacles or sudden changes in the road or traffic conditions. Driving without lights altogether is dangerous and illegal, as it significantly increases the risk of accidents. These considerations affirm why using low beam headlights is the best option in such conditions.