Road surface
Thomas Telford (1757–1834) was a Scottish civil engineer. He is noted for building flat roads that required fewer horses to pull the wagons. His roads were well designed and supported heavy loads. John Loudon McAdam (1756–1836), was a Scottish engineer and road-builder. He invented a new process, "macadamisation", for building roads with a smooth hard surface that drained quickly. His roads were more durable and less muddy than soil-based roads.