Construction process road

The below heads explain the road construction step by step.
A subgrade is the lowest layer of a road.
It is the foundation for the road.
The soil is a subgrade material.
The process of preparing the subgrade is as follows.
Prepared Subgrade for a Road.
Image Courtesy- HighwaysGuide .

A road construction site.
PHOTO | COURTESY Road construction is the process of installing soil stabilisers, asphalt, concrete, and other materials on a defined path to create a smoothed or paved surface that vehicles can move on between two destinations.