Why do potholes happen on the road and not anywhere else?

Potholes occur on roads primarily due to the combination of weather conditions, traffic stress, and the materials used in road construction. When water seeps into cracks in the pavement and freezes, it expands, causing the surface to crack further. As vehicles pass over these weakened areas, the repeated stress contributes to the formation of potholes. Unlike other surfaces, roads are subject to constant wear and environmental factors, making them more susceptible to damage.