Idaho Written Driver's License Practice Test

When driving in low visibility conditions such as dusk or rain, what lights should you use?

1. High beam lights

2. Fog lights

3. Low beam lights

4. Flashers

The correct answer is: Low beam lights

Using low beam lights in low visibility conditions such as dusk or rain is essential for several reasons. Low beam lights are designed to provide adequate illumination of the road directly in front of the vehicle without causing glare for other drivers. This reduces the risk of blinding oncoming traffic, which is crucial in conditions where visibility is compromised. In situations like rain or at dusk, using high beam lights can create a reflection off the rain or fog, which can hinder visibility rather than improve it. Fog lights have a specific use, primarily designed to illuminate the road immediately ahead of the vehicle in thick fog, but they may not be necessary in all low visibility situations. Finally, using flashers is not appropriate for driving under these conditions, as they are intended to indicate that a vehicle is stationary or experiencing a problem rather than to aid in visibility while driving. Thus, the correct choice of low beam lights provides the safest and most effective solution for handling low visibility scenarios on the road.