Why are roads covered in cracks and potholes in the winter time?

Roads can develop cracks and potholes in winter due to the cycle of freezing and thawing. When water seeps into cracks in the road surface and freezes, it expands, causing the pavement to crack. As vehicles drive over these weakened areas, the pavement can break apart, forming potholes. Additionally, the use of road salt and other de-icing chemicals can further deteriorate the road surface.