 Had the route been constructed it would have revived a tram route established in 1904 and which was replaced by a trolleybus route 607 which was itself superseded by the present bus routes.The trams were to run on a completely on-street route, with a mixture of stretches shared with road traffic, "accessible" routes (controlled lanes which road traffic would be permitted to enter temporarily, for example to avoid an obstruction), and segregated stretches of track which would be for tram use only, mostly along the central reservation of the Uxbridge Road.The tram was partly envisaged as a "feeder" service for other modes of transit, transporting passengers to interchange points with London Underground, London Overground and the future Crossrail service.