Circle line (London Underground) with the other London Underground sub-surface lines: the Hammersmith & City line from Hammersmith to just before Aldgate; the Metropolitan line from Baker Street to Aldgate; and the District line from Tower Hill station to Edgware Road station. The line is electrified with a four-rail DC system: a central conductor rail is energised at and a rail outside the running rail at , giving a potential difference of . The running rails are not electrified. Much of the double track railway from the Hammersmith terminus to Westbourne Park station is on a high brick viaduct. East of Westbourne Park the
Line 1 (Ningbo Rail Transit) District. Then it passes Ningbo East New Town and then go overground. Finally the metro line extends into Beilun District and ends there. The section between Gaoqiao and Ningbo East New Town has been constructed as the first phase which started service on May 30, 2014. The rest section from Ningbo East New Town to Beilun District opens on March 19, 2016. The line has 28 stations in total, of which 12 are elevated and the rest are underground. Till June 2014, 20 stations of Line 1 are operational. Line 1 (Ningbo Rail Transit) Line 1 of Ningbo Rail Transit