Potholes Are Actually Caused By Water
Potholes aren't just caused by heavy traffic wearing down the road. They form when water seeps underground, softening the soil and leaving the asphalt without support until it eventually collapses under pressure.
Think of a pothole as a miniature sinkhole rather than just surface wear. Once water weakens the base, the weight of passing vehicles causes the pavement to crack and crumble. The ongoing flow of traffic then clears out the broken debris, effectively scooping out the hole. It is a persistent cycle that explains why potholes appear most frequently after periods of heavy rain or freezing temperatures.
Source: Pothole