Weather Tidbits: Pothole Formation
This Weather Tidbits explains how a pothole is formed. It begins by the water seeping in through the cracks in the road which collect underneath, softening the road base. Once the water freezes, it expands and forces the pavement upwards; while traffic adds extra stress on the weakened pavement. Once the drier weather arrives, the water dissipates leaving a hole under the pavement; while the weight of passing vehicles causes the road surface to collapse into the hole. The pothole is formed where the road collapsed and continuous traffic expands the hole with time.