Road surfaces

Maintaining road surfaces

• The RTA maintains 20,400 km of main roads in NSW
• Every year, 11% or 13 million square metres of main roads are resurfaced, equivalent to about 1,800 km of a two-lane rural road.
• Resurfacing can involve:
  • laying a new surface on top of the old by spraying bitumen and rolling stone chips into it, or laying a new thin layer of asphalt;
  • removing the old surface and replacing it with a new layer of asphalt;
  • recycling the old surface by remixing and stabilising the asphalt.