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An uneven foundation or repeated loads will sometimes cause a small crack. Then, rain water will get into the crack. If the water freezes or evaporates, it will expand and cause more damage. Also, repeated loading of vehicles driving on cracks will deteriorate the road even more.

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Because they are shaped like the bottom of a pot hense the 'pot'hole

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15y ago
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Q: Why are holes in roads called pot holes?
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