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In page Victoria line:

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Step-free routes are available between the Victoria line and other lines at most interchanges.[6] Tottenham Hale, King's Cross St. Pancras, Green Park, Victoria, Vauxhall and Brixton have step-free access from street to train.[6][7][8][9][10] Platform humps have been installed at all stations (except Pimlico) to provide level access to trains, improving access for customers with mobility impairments, luggage or pushchairs.[11]