A road machine is a type of heavy machinery used in the construction and maintenance of roads. The three main components of a road machine are a SCRAPER, grader, and paver. A SCRAPER is a large motorized device with a wide blade that is used to move soil, gravel, or other material from one location to another. A grader is a machine with a long blade that is used to level and smooth the surface of a road. Finally, a paver is a machine that lays asphalt or other materials to create a smooth, even surface for a road.