Routine maintenance of unsealed roads using best practice standards is usually more cost-effective than allowing roads to deteriorate to levels requiring substantial works.
The information and advice provided in this guide is based on best management practices. Any legislative or regulatory requirements prevail. The management practices described in this guide are not the only approaches to erosion and sediment control on unsealed roads. Technically sound site-specific approaches should be considered where they meet the relevant operational, safety and environmental outcomes.
More information is available in Managing Urban Stormwater: Soils and construction Volume 2C, Unsealed roads.