Strand Underpass the former Aldwych tramway station: because of the greater width requirement, 27 trees and some pavement were removed for it to be constructed. The tunnel is used by the 521 bus route northbound. In 2012, the direction of traffic in the tunnel was temporarily reversed, so that it was in use by southbound traffic. This was to facilitate easier traffic flow during the 2012 Summer Olympics. Strand Underpass The Strand Underpass is a one-way vehicle tunnel in central London connecting Waterloo Bridge to Kingsway near Holborn. Opened in 1964, it was built within the former Kingsway tramway subway, which closed
London Bridge Area Signalling Centre Charing Cross and London Bridge (Central) traffic. Prior to the London Bridge ASC, Cannon Street and Charing Cross traffic arrived at London Bridge on all lines and was either signalled approaching or leaving London Bridge station to their respective destinations. With the development of London Bridge ASC, all this traffic was sorted out further outside London Bridge, mainly at Parks Bridge but occasionally in the New Cross area. The London Bridge central traffic was kept as a separate working railway from the eastern side. The signalling centre is a two-storey building. The upper section is about two-thirds the length and