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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 .
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.
The first trolleybus line was opened by the former Market Street Railway Company (MSR). The San Francisco Municipal Railway ("Muni") opened the second trolleybus line on 7 September 1941. MSR was absorbed by Muni on 29 September 1944. Most of the current trolleybus system was built to replace MSR tramway lines.
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 ...
A trolleytruck (also known as a freight trolley or trolley truck [1]) is a trolleybus-like vehicle used for carrying cargo instead of passengers. A trolleytruck is usually a type of electric truck powered by two overhead wires , from which it draws electricity using two trolley poles .
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).
Trolley pole wheel on top of the trolley pole of Twin City Rapid Transit Company No. 1300. A current collector (often called a "pickup") is a device used in trolleybuses, trams, electric locomotives and EMUs to carry electric power from overhead lines, electric third rails, or ground-level power supplies to the electrical equipment of the vehicles.
A trolleybus of the Oakwood Street Railway, one of multiple companies that once operated trolleybuses in Dayton, passing the Montgomery County Courthouse in 1937. The first electric trolley bus (ETB) service in Ohio began operation in Dayton, on April 23, 1933, when the Salem Avenue-Lorain Avenue line was converted from streetcars to trolley coaches — or trolley buses, as they are most ...
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