Buses in Barcelona are a major form of public transport in Barcelona, with an extensive local and interurban bus network. There is also a network of night buses called Nitbus and it is being set up a bus rapid transit system called RetBus, which is intended to complement the current local bus network. All bus routes serving Barcelona metropolitan area are organized by Autoritat del Transport Metropolità (ATM). Local services are operated in most part by Transports Metropolitans de Barcelona (TMB), although other bus services are operated by several private companies under common names.