• Macadam - Wikipedia

    Macadam is a type of road construction, pioneered by Scottish engineer John Loudon McAdam around 1820, in which single-sized crushed stone layers of small angular ...

  • Stone | material | Britannica

    road construction. In roads and ... There are practical reasons for this: many types of stone are highly resistant to the weather and therefore suitable for external ...

  • Road surface - Wikipedia

    ... followed by successive layers of smaller stones, until the road surface was ... A road of such material is called a "metalled road ... Road construction; Road ...