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
Termini (Rome Metro) be the only transfer point between lines; Line C will have transfers to Line A at Ottaviano and San Giovanni and to Line B at Colosseo. It will also mean that there will be no station on the system that will still serve all lines. This station has: Termini (Rome Metro) Termini is an underground station of the Rome Metro. The station was inaugurated on 10 February 1955 as a station on Line B, and later became an interchange with Line A. The station is found in Piazza dei Cinquecento, under the Termini rail terminal. Together, the two stations form