In the Manchester area, the L&YR Bury line was first electrified with overhead wires (1913), then changed to third rail (1917; see also Railway electrification in Great Britain) and then back again in 1992 to overhead wires in the course of its adaptation for the Manchester Metrolink. Trams in city centre streets, carrying collector shoes projecting from their bogies, were considered too dangerous for pedestrians and motor traffic to attempt dual-mode technology (in Amsterdam and Rotterdam "Sneltram" vehicles go out to surface in suburbs, not in busy central areas). The same thing happened to the West Croydon – Wimbledon Line in Greater London (originally electrified by the Southern Railway) when Tramlink was opened in 2000.