When are headlight use required in Washington State?

In Washington State, the use of headlights is required in poor visibility conditions. This includes situations such as fog, rain, snow, or any other atmospheric conditions that make it difficult for drivers to see the road clearly or for other drivers to see them. The law emphasizes the importance of safety and visibility on the road, ensuring that all vehicles are easily seen by others, regardless of the time of day or weather conditions.

While it is certainly important to use headlights at night and during rain, their use is not limited only to these circumstances. Heavy traffic alone does not dictate the need for headlights unless visibility is reduced. The regulation aims to enhance overall driving safety and maintain a clear and visible environment for all road users.