
On this day in 1836 John McAdam, the inventor of the "tar macadam" road surface, died.
Although born in Ayrshire, McAdam had been a colonist in America, but returned after the American War of Independence, having supported the Crown. As a Deputy-Lieutenant in Ayrshire, he despaired at the condition of the roads, and began experimenting with different methods of road surfacing. He finally settled on a technique of using layers of crushed stone, getting smaller towards the top, which compacted under the weight of vehicles, creating a solid durable road surface.


