macadam stone road surface | 
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| navigate by keyword : block compacted construction crushed engineer hard john layers loudon macadam mcadam method path road roadway route scottish shallow singlesized stone stones street surface texture track traffic type way		 | 
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| Macadam is a type of road construction, pioneered by Scottish engineer John Loudon McAdam around 1820, in which single-sized crushed stone layers of small angular stones are placed in shallow lifts and compacted thoroughly. | 
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