Trolleybus

1 ANSWERS

1. GiGi
   

   A trolleybus (also known as trolley bus, trolley coach, trackless trolley, trackless tram or simply trolley) is an electrically powered bus that draws its electricity from a network of charged overhead wires (which are generally suspended from roadside posts) using spring loaded trolley poles. Two poles are needed, so that one can draw down the live current to power the motor and the other can complete the circuit by carrying the neutral current back to the network. As the rubber tires on a bus do not conduct electricity the neutral current cannot pass directly to the ground via the wheels, whereas an electric tram (or streetcar) can use its steel wheels to take the current to ground via the tramway rail. There are trolleybuses in many cities around the world.
   
   Solaris trolleybus in Landskrona, Sweden.
   
   Solaris Trollino 15AC trolleybus in Vilnius.
   
   A double-deck trolleybus in Reading, England, 1966.

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