Trolleybus

A trolleybus (also known as trolley bus, trolley coach, trackless trolley, trackless tram or simply trolley) is an electric bus powered by two overhead wires, from which it draws electricity using two trolley poles. Two poles are required in order to accommodate the return current, which cannot pass to the ground as in the case of an electric tram (also called a streetcar) since trolleybuses use rubber tires, rather than steel wheels on rail. There are trolleybuses in many cities around the world.
Trolleybus makers:
Carrosserie Hess, Designline, Irisbus, Mercedes-Benz, Minsk Automobile Plant, Neoplan, New Flyer Industries, Orion Bus, Rocar, Skoda Works, Solaris Bus & Coach, Trolza, Van Hool, Volvo/Sunwin.

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  History of a bus

  Types of bus:

• Minibus
  
• Low floor bus
  
• Midibus
  
• Tourist trolley
  
• Transit bus
  
• Trolleybus
  
• Articulated bus
  
• Coach (vehicle) bus
  
• Double-decker bus
  

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