Vauxhall station is a National Rail, London Underground and London Buses interchange station in central London. It is at the Vauxhall Cross road junction opposite the southern approach to Vauxhall Bridge over The River Thames in the London district of Vauxhall. The station is on the boundary of zones 1 and 2 of the London Travelcard area and, although a through station, it is a central London railway terminus for ticketing purposes. The bus station, at ground level across the road from the rail station, has a photovoltaic roof supplying much of its electricity. It is the second busiest London bus station, after that at Victoria.