John Loudon McAdam, Scottish engineer (born 1756)

John Loudon McAdam

Scottish engineer and road-builder (1756–1836)

John Loudon McAdam was a Scottish civil engineer and road-builder. He invented a new process, "macadamisation", for building roads with a smooth hard surface, using controlled materials of mixed particle size and predetermined structure, that would be more durable and less muddy…