TROLLEYBUS (ELECTRIC TROLLEYBUS-ETB, TROLLEY COACH)

An electrically propelled bus that obtains power via two trolley poles from a dual (positive and negative) overhead wire system along routes. It may be able to travel a limited distance on battery power or an auxiliary internal combustion engine. The power-collecting apparatus is designed to allow the bus to maneuver in mixed traffic over several lanes. (TRB)

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