why are roads made rough instead of smooth

Roads are made rough instead of smooth because rough surface help in friction. It helps to interlock the tyres and road surface . By that you can take brake easily and your veichles can move where you want.

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THEY ARE NOT MADE SNOOTH BECAUSE THEN U WOULD JUST SLIDE AWAY........! BECAUSE THERE WONT BE ANY FRICTION BETWEEN THE TIRE AND THE ROAD
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