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At the Missouri Department of Transportation, the start of March means crews turn their attention to the potholes that “spring” forth as temperatures change.

           

Potholes form when temperatures warm up during the day but continue to be cold at night. Moisture from winter rain and snow constantly seeps into the cracks and joints of the roadway. When the temperatures drop at night, that water freezes and expands the pavement, which causes it to crack and bulge. As cars and trucks drive over those cracks, the pressure causes chunks of pavement to pop out, and potholes are formed.

 
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