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Busscar trolleybus in São Paulo, Brazil Solaris trolleybus in Landskrona, Sweden Video of a trolleybus in Ghent, Belgium. A trolleybus (also known as trolley bus, trolley coach, trackless trolley, trackless tram – in the 1910s and 1920s [1] – or trolley [2] [3]) is an electric bus that draws power from dual overhead wires (generally suspended from roadside posts) using spring-loaded ...
Trolleybuses use a second parallel overhead line for the return, and two trolley poles, one contacting each overhead wire. (Pantographs are generally incompatible with parallel overhead lines.) The circuit is completed by using both wires. Parallel overhead wires are also used on the rare railways with three-phase AC railway electrification.
Trolleybuses, on the other hand, must use two trolley poles and dual overhead wires, one pole and wire for the positive "live" current, the other for the negative or neutral return. The tramway system in Havana , Cuba , also utilized the dual-wire system, [ 6 ] as did the Cincinnati, Ohio streetcar system .
No connection between it and the route's wiring was built. As was normal for trolleybuses built before the 1980s, the fleet of trolleybuses lacked any equipment for operating away from the overhead wires. In the last few years of service, the only lines in operation had been 4-barrato, 8-barrato (renumbered as 8 by 1983) [15] and 15. [1]
Boston Neoplan DMA-460LF dual-mode trolleybus, operating in diesel mode (with its trolley poles lowered). A dual-mode bus is a bus that can run independently on power from two different sources, typically electricity from overhead lines like a trolleybus or from batteries like a hybrid bus, alternated with conventional fossil fuel (generally diesel fuel).
The Belfast trolleybus system served the city of Belfast, Northern Ireland. It was the only trolleybus system built in Ireland. Opened on 28 March 1938 (), it gradually replaced the city’s tramway network. The Belfast system was the second largest trolleybus system in the United Kingdom, after the London system. It had a total of 17 routes ...
Trolley wire may refer to: Overhead line, used to transmit electricity to trains, trams and trolleybuses; Trolley Wire, magazine published by the Sydney Tramway Museum
Dual-mode (diesel-trolley) buses operated 15 September 1990 – 24 January 2005 on routes using the Downtown Seattle Transit Tunnel. The overhead wire system in the tunnel was not connected to that used by surface trolleybus services.
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