The first step in repaving a road is to remove the top layer of the old asphalt. This requires the use of heavy equipment in a process called milling. A milling machine grinds up the old road material and begins the process of sizing it back into the correct consistency of crushed stone to be reused in the fresh pavement. Milling is often done at night, when traffic is at a minimum. The process requires a highly skilled team that must constantly assess and adapt to the thickness of the existing pavement.
Once the top layer of pavement is removed, the old road material can be mixed with virgin aggregate and liquid asphalt for the next step in repaving – a fresh new layer of asphalt surface.