The spring thaw on area roadways has left cars and trucks bumping and swerving to avoid the potholes of spring. Crosslake public works director Ted Strand explained that potholes form when cracks in the road fill with water during thaw. The water freezes overnight, and forces some of the asphalt out of the road. He said the same thing that forms the potholes makes them difficult to fill. The fill the city uses in the holes is at risk of popping out if water seeps in and freezes.