This TECHnote provides guidance on using the AUS-SPEC specification system for the design, construction and maintenance of unsealed roads. Unsealed roads account for approximately 484,000 km from a total of 810,000 km of Australia’s road network and provide access to rural and remote areas for passenger and commercial vehicles, haulage vehicle routes and emergency services access. They comprise either natural material or gravel and do not have a permanent water-resistant surface like bitumen spray seal, asphalt or concrete.