What can restrict visibility while driving?

Visibility while driving can be restricted by various factors, which is why the comprehensive answer captures all the mentioned elements.

Sunlight can create glare, making it difficult for drivers to see clearly, especially when the sun is low on the horizon during dawn or dusk. This can result in impaired vision and increase the risk of not seeing other vehicles, pedestrians, or road signs effectively.

Hills can also obstruct visibility because they can create blind spots. When approaching a hill, drivers may not be able to see what is on the other side, including other vehicles or potential hazards, which can make navigating safely more challenging.

On-coming traffic can restrict visibility as well, particularly in narrow roads or when vehicles are too closely spaced. When vehicles pass, it can block the driver’s line of sight to other potential dangers on the road.

Since all these factors—sunlight, hills, and on-coming traffic—can significantly affect a driver’s ability to see and react to the road and surroundings, the most inclusive answer is that they all contribute to restricted visibility while driving.