seldom have all the amenities of inter-city trains such as a buffet or dining car. Since their invention, the distinction between regional and long-distance rail has also been the use of multiple unit propulsion, with longer distance trains being locomotive hauled, although development of trains such as the British Rail Class 390 have blurred this distinction. Shorter regional rail services will still usually be operated exclusively by multiple units where they exist, which have a shorter range and operate at lower average speeds than services on Inter-city rail networks. Not using a locomotive also provides greater passenger capacity in the commuter role at peak periods. British Rail, during sectorisation, did once create a "Regional Railways" subsidiary, however this was so named to differentiate it's 'all other regions' lines from the other sectors Network SouthEast, which heavily focused on commuters services to London terminal stations but operated rail services across the South East region, and the Inter-City sector which operated long-distance services. Commuter rail in North America refers to urban passenger train service for local short-distance travel operating between a central city and its suburbs. Such rail service, using either locomotive-hauled or self-propelled railroad passenger cars, is characterized by multi-trip tickets, specific station-to-station fares, and usually only one or two stations in the central business district. It does not include heavy rail, rapid transit, light rail, streetcar, tram, or intercity rail service. Some commuter rail systems do link nearby cities, e.g. Boston and Providence (MBTA) or Baltimore and Washington (MARC Train). The national passenger rail provider, Amtrak, uses the term Regional to distinguish its slower trains on the Northeast Corridor from its Acela high-speed express service. The term regional railroad refers to second-tier freight lines. Intercity, corridor, and long-distance The Inter-City was a British named train, introduced in 1950, but the term InterCity was adopted by British Rail in 1966 as a brand-name for its long-haul express passenger services. Since then, the terms Inter-city or intercity have been widely adopted to refer to express passenger train services that cover longer distances than commuter or regional trains. In the U.S., "corridor" services refer to routes connecting relatively nearby cities, where one city can be visited from another without staying overnight. "Long-distance" refers to routes which cover vast rural distances. Other types of rail transit Automated guideway transit refers to guided transit vehicles operating singly or in multi-car trains with fully automated control