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 station The station was originally opened by the London and Greenwich Railway as a local service. It subsequently served the London and Croydon Railway, the London and Brighton Railway and the South Eastern Railway, thus becoming an important London terminus. It was rebuilt in 1849 and again in 1864 to provide more services and increase capacity. Local services from London Bridge began to be electrified at the turn of the 20th century, and had spread to national routes by the 1930s. The station was extensively rebuilt by British Rail in the 1970s, along with a comprehensive re-signalling scheme and track alignment.