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Trolleybus in Glesga in 1966

A Trolleybus is an electric bus that draws power frae owerheid wires (generally suspended frae roadside posts) uisin spring-loaded trolley poles. Twa wires an poles are required tae complete the electrical circuit. This differs frae a tram, which normally uses the track as the return path, needing anly ane wire an ane pole or a pantograph. Thay are an aa distinct frae ither kinds o electric buses, which uisually rely on batteries. Power is maist commonly supplied as direct current at 500 or 600 volts