London Underground at +420 V, giving a potential difference of 630 V. On the sections of line shared with mainline trains, such as the District line from East Putney to Wimbledon and Gunnersbury to Richmond, and the Bakerloo line north of Queen's Park, the centre rail is bonded to the running rails. The average speed on the Underground is 20.5 mph. Outside the tunnels of central London, many lines' trains tend to travel at over 40 mph in the suburban and countryside areas. The Metropolitan line can reach speeds of 62 mph. The London Underground was used by 1.379 billion passengers in
Stations around Shepherd's Bush City Underground station (opened in 1947 to replace the former Wood Lane station) and the 2008 Wood Lane Hammersmith & City line station. Stations around Shepherd's Bush Shepherd's Bush is an area of west London, England, which has been served by a number of London Underground and commuter rail stations over the past 150 years, many of which have had similar names. The names "Shepherd's Bush", "Wood Lane" and "White City" have each been used by several separate stations around the Shepherd's Bush district, following a number of station renamings and closures. The first Shepherd's Bush station was opened in