McAdam
Gravel road pioneer
McAdam refers to John Loudon McAdam (1756–1836), the Scottish engineer who developed a revolutionary road-building technique.
His method—layers of small broken stones compacted into a smooth, durable surface—transformed transportation and gave English the word macadam for such roads, and later tarmac when tar was added as a binder.
asphalt
Petroleum-based paving material
- pavementHard road covering
- aggregateCombined sum total
- compactionReducing volume through pressure
roller · chippings · subgrade · bitumen · crushed stone · gravel · binder · gradation · camber · drainage
Scottish
Of that northern kingdom
ancestry · genealogy · heritage · lineage · patronymic · family · kinship · forebears · descendants · bloodline
road construction method
McAdamdirt road
Unpaved rural thoroughfare
cobblestone · mud track · gravel path · Roman road · unpaved road
- John McAdamInvented layered stone roads