During what conditions are road conditions most dangerous?

Road conditions are most dangerous during heavy rainfall or snow due to several factors that significantly reduce vehicle traction and impede visibility. When it rains heavily, the water can create a layer between the tires and the road, leading to hydroplaning, where the tires lose contact with the surface. This loss of traction can make it difficult for drivers to control their vehicles, increase stopping distances, and heighten the risk of accidents.

Similarly, snow can create a slippery surface that not only reduces traction but also makes it harder for drivers to judge stopping distances and react to sudden changes in road conditions. Snow can also lead to reduced visibility if it is falling heavily, increasing the risk of collisions as drivers may struggle to see other vehicles, traffic signals, or road signs.

In contrast, road conditions during summer are generally more favorable, sunny days provide good visibility and dry conditions, and well-lit roads at night typically offer safer driving environments compared to poorly lit ones. Therefore, heavy rainfall or snow presents the most significant dangers.