The local bus network is very extended and reaches all neighbourhoods in Barcelona including some municipalities attached to the city and the airport. Local buses are operated in most part by Transports Metropolitans de Barcelona (TMB) although there are some lines which are operated by private sector companies under contract to TMB. There are over 100 urban lines serving the city and most of them pass through two or more districts, covering relatively long distances within Barcelona. Because of this, some lines called Bus del Barri (meaning The Neighbourhood's Bus in Catalan) were created. These lines are operated by small buses and cover short-haul routes enabling access to various parts of the neighbourhood as the shopping area, health care services, education centers and other facilities.
During the night, the company NitBus provides a night-time bus service in Barcelona and the first metropolitan ring with 17 lines. All of them, except the N0, go through Plaça de Catalunya, where you can change to other lines.