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
Guadalajara light rail system Guadalajara light rail system The Guadalajara light rail system (), which is operated by SITEUR (Sistema de Tren Eléctrico Urbano, Spanish for Urban Electrical Train System), is a light rail system serving the municipalities of Guadalajara, Zapopan and Tlaquepaque, in the state of Jalisco, Mexico. It is owned by the state of Jalisco, and operator SITEUR is a state authority. Opened in 1989, the system currently has two lines: Line 1, running from north to south, with 19 stations, and Line 2, running from the city centre to the east, with 10 stations. The history of urban trains in Guadalajara