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Wikipedia: A trolleybus (also known as trolley bus, trolley coach, trackless trolley, trackless tram or trolley) is an electric bus that draws its electricity from overhead wires (generally suspended from roadside posts) using spring-loaded trolley poles. Two wires and poles are required to complete the electrical circuit, unlike a tram or streetcar, which normally uses the track as part of the electrical path and thus needs only one wire and pole.
![[A preserved 1954 CCF-Brill trolley bus in Edmonton]](http://images.ookaboo.com/photo/s/Edmonton_CCF_Brill_trolleybus_202_s.jpg "A preserved 1954 CCF-Brill trolley bus in Edmonton")
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![[Urbanuss Pluss trolleybus made by Busscar, in operation in São Paulo.]](http://images.ookaboo.com/photo/s/Trolleybus_Low_Floor_4_1500_Sao_Paulo_2C_Brazil_s.jpg "Urbanuss Pluss trolleybus made by Busscar, in operation in São Paulo.")
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 from Steve Morgan |
 from Rafael-CDHT |
![[A Belkommunmash AKSM-32100S trolleybus in Belgrade]](http://images.ookaboo.com/photo/s/Beogradski_trolejbus_s.jpg "A Belkommunmash AKSM-32100S trolleybus in Belgrade")
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![[Outside Piraeus station in 2010]](http://images.ookaboo.com/photo/s/TrolleyBusPiraeus_s.jpg "Outside Piraeus station in 2010")
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from IIAleksandarII |
from Northernhenge |
![[Trolleybus near Pyongyang Railway Station in 2007]](http://images.ookaboo.com/photo/s/In_front_of_Pyongyang_Station_DPRK_s.jpg "Trolleybus near Pyongyang Railway Station in 2007")
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![[AKSM-420 trolleybus in Minsk]](http://images.ookaboo.com/photo/s/AKCM_420_in_Minsk_04_s.jpg "AKSM-420 trolleybus in Minsk")
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from Kounosu |
from Redline |
![[A trolleybus on Shanghai route 11 in 2007]](http://images.ookaboo.com/photo/s/Shanghai_trolleybus_2C_type_SK5105_s.jpg "A trolleybus on Shanghai route 11 in 2007")
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![[A postcard of Piran from 1909]](http://images.ookaboo.com/photo/s/Piran_Tartini_Square_Trolleybus_s.jpg "A postcard of Piran from 1909")
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from Ajznponar |
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![[Van Hool trolleybus in Genoa, Italy]](http://images.ookaboo.com/photo/s/Filobus_Genova_XXsett_2_s.jpg "Van Hool trolleybus in Genoa, Italy")
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![[AKSM-321 in Belgrade]](http://images.ookaboo.com/photo/s/Beo_trolejbus_00_s.jpg "AKSM-321 in Belgrade")
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from Steve Morgan |
 from Stevan |
![[Various trolleybuses in Valparaíso, Chile]](http://images.ookaboo.com/photo/s/Trolleybuses_in_Valparaiso_s.jpg "Various trolleybuses in Valparaíso, Chile")
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![[One of São Paulo EMTU's low-floor trolleybuses]](http://images.ookaboo.com/photo/s/Trolebusbusscarmetrasaopaulobrasil_s.jpg "One of São Paulo EMTU's low-floor trolleybuses")
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from Ankara |
from Papercut.616 |
![[Trolleybus wire switch]](http://images.ookaboo.com/photo/s/Trolley3WireSwitch_s.jpg "Trolleybus wire switch")
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![[Irisbus Cristalis trolleybus in Limoges, France]](http://images.ookaboo.com/photo/s/Trolleybus_Cristalis_ligne_4_s.jpg "Irisbus Cristalis trolleybus in Limoges, France")
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from Cmapm |
from Momox de Morteau |
![[The "Elektromote", the world's first trolleybus, in Berlin, Germany, 1882]](http://images.ookaboo.com/photo/s/Elektromote1882_s.jpg "The \"Elektromote\", the world's first trolleybus, in Berlin, Germany, 1882")
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![[Van Hool trolleybus in Genoa, Italy]](http://images.ookaboo.com/photo/s/Filobus_Genova_XXsett_s.jpg "Van Hool trolleybus in Genoa, Italy")
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from Tohma |
from Friedrichstrasse |
![[Pole headworks with springs and dampers]](http://images.ookaboo.com/photo/s/TrollyHeadworks5875_s.jpg "Pole headworks with springs and dampers")
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![[A trolleybus in Baia Mare]](http://images.ookaboo.com/photo/s/Baia_Mare_Trolleybus_s.jpg "A trolleybus in Baia Mare")
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from Ralf_Roletschek |
from Sorinucu2007 |
![[A trolleybus in Naples]](http://images.ookaboo.com/photo/s/Naples_trolleybus_PzaCarlo3_s.jpg "A trolleybus in Naples")
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![[Preserved vintage trolleybus made by FIAT for the Piraeus]](http://images.ookaboo.com/photo/s/20090412_Piraeus_FIAT_704_s.jpg "Preserved vintage trolleybus made by FIAT for the Piraeus")
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from Steve Morgan |
from Sv1xv |
![[Irisbus Cristalis trolleybus in Lyon, France]](http://images.ookaboo.com/photo/s/Irisbus_Cristalis_ETB18_C3_Lyon_TCL_s.jpg "Irisbus Cristalis trolleybus in Lyon, France")
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![[Indicator for a wire switch[http://www.greenfleet.info Greenfleet]]](http://images.ookaboo.com/photo/s/Catenaryswitch_s.jpg "Indicator for a wire switch[http://www.greenfleet.info Greenfleet]")
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from Ibou69100 |
from Gerfriedc |
![[Insulated poles, contactors, and pull–ropes]](http://images.ookaboo.com/photo/s/TrollyRopes5874_s.jpg "Insulated poles, contactors, and pull–ropes")
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from Leonard G. |
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