The TRANSPLAN Committee coordinates the regional transportation interests of the communities in the cities of Antioch, Brentwood, Oakley and Pittsburg, and eastern Contra Costa County.
The five member governments of TRANSPLAN include the Cities of Antioch, Brentwood, Oakley and Pittsburg, and Contra Costa County. Contra Costa County governs the unincorporated East County communities of Bay Point, Bethel Island, Byron, Discovery Bay and Knightsen.