Electromote in Berlin, 1882

A Polish Solaris trolleybus in Landskrona, Sweden

An Ikarus trolleybus

An New Flyer low floor Trolleybus in Vancouver

Trolleybus networks around the world:      Trolleybus networks in operation, including bus rapid transit networks      Trolleybus networks in operation, without bus rapid transit networks      Trolleybus networks planned (as new or reconstruction)      Countries that had trolleybus networks      Countries that never had trolleybus networks

A trolleybus (also known as trolley bus, trolley coach, trackless trolley, trackless tram or simply trolley) is a bus which runs on electricity. It gets its power for the electric motors that drive the wheels from a pair of power lines above the street.

On the roof of the bus are two "trolley poles" from which electric current flows between the wires and the bus. One wire is for the positive current and the other is for the negative (return) current.