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Bus Beside an Overhead Line Pole

An electric transit bus depicted alongside a street utility pole and overhead power lines.

A city bus beside an overhead line pole and electrical wires, with clear sections for children to color.
Bus Beside an Overhead Line Pole
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A4 format (portrait), black outlines on a white background · for home and classroom use

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Electric City Bus and Utility Infrastructure

This page illustrates a public transit vehicle positioned in the center, viewed from a front and side angle. Next to the bus stands a tall utility pole supporting two electrical lines across the upper scene, while a dashed road line extends across the pavement below.

How Overhead Power Lines Supply Energy to Trolleybuses

Electric trolleybuses run on electricity drawn directly from overhead power lines through roof-mounted poles called trollers. This continuous electrical supply allows the bus to operate quietly and cleanly without producing exhaust emissions along city streets. Cities with hilly terrain or busy transit corridors often use electric overhead wiring systems to power public transportation efficiently.

Colors of Electric Transit Infrastructure

  • Utility Pole: Weathered gray concrete or dark brown treated wood
  • Overhead Power Wires: Dark charcoal or black copper electrical cables
  • Road Surface: Dark gray asphalt with white or yellow dashed lane markings
  • Bus Bodywork: Bright municipal fleet colors such as yellow, blue, or green
Questions and answers

Questions and Answers

What is the main benefit of an electric trolleybus over a diesel bus?
Trolleybuses produce zero tailpipe emissions, helping to keep city air clean while providing quiet electric propulsion.
Why are there two overhead wires instead of just one?
Rubber bus tires do not conduct electricity like metal train tracks, so one wire supplies electrical current while the second wire completes the electrical circuit.
How do the poles on top of a trolleybus stay connected to the wires?
Spring-loaded poles press upward against the wires, using flexible contacts that slide smoothly along the cables as the bus moves.
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