Road workers pave and maintain roads and other surfaces such as runways, parking areas and pathways. They remove topsoil from road areas, lay bitumen and concrete, apply gravel, stone chips or asphalt to tar surfaces, dig up road surfaces to lay cables or pipes, and compact and smooth road surfaces. They also direct traffic through construction areas, clean work areas, and load and unload equipment into and out of vehicles. They also construct and dismantle safety barricades around work sites. Road workers work all over the state, from the busy freeways that run through Perth, to country roads in isolated areas.