The California Department of Transportation (Caltrans) is a chief branch of the U.S. territory of California. The office is important for the bureau level California State Transportation Agency (CalSTA). Caltrans deals with the public's parkway framework, which incorporates the California Freeway and Expressway System, underpins public transportation frameworks all through the state and gives subsidizing and oversight to three state-upheld Amtrak intercity rail courses (Capitol Corridor, Pacific Surfliner and San Joaquins) which are on the whole marked as Amtrak California.