Public transportation in Phoenix, Arizona consists primarily of buses, a 28-mile (45 km) light rail system, and minor additional services. Most transit services run under the name Valley Metro; local cities, counties, and other agencies in the Phoenix area have agreed to use the Valley Metro name. Public transport in the Greater Valley of the Sun exists in a number of modes: local, express, and RAPID commuter buses; neighborhood circulators; dial-a-ride; vanpool service; an online carpool-matching system, and METRO light rail.