Who first thought of building macadamized roads?

Who first thought of building macadamized roads?

Modern tarred roads were the result of the work of tow Scottish engineers, Thomas Telford and John Loudon McAdam. Telford designed the system of raising the foundation of the road in the centre to act as a drain for water. Thomas Telford improved the method of building roads with broken stones by analyzing stone thickness, road traffic, road alignment and gradient slopes. Eventually, his design became the norm for all roads everywhere. John Loudon McAdam designed roads using broken stones laid in symmetrical, tight patterns and covered with small stones to create a hard surface. McAdam’s original design, called ‘macadam roads’ provided the greatest advancement in road construction.