In general, most of the construction sites are using a water hose at the entrance of the site to clean manually the departing vehicles. By doing so, extensive labour force is used and a lot of water is consumed. In many occasions, the mud and grit adhered to the underside of vehicle chassis and the inner wheels of the vehicles could not be removed effectively by the water hose. EnviroWash is a high performance automatic wheel washing machine aimed at washing away the mud and grit adhered to the wheels of trucks when the truck is leaving a construction site. It provides a cost-effective solution for construction site to comply with the environmental requirements.