A '''tram''' (U.S. '''streetcar''' or '''trolley''') is a vehicle that runs on rails in cities, frequently along streets, where the rails are laid flush with the road surface.
A '''tram''' (U.S. '''streetcar''' or '''trolley''') is a vehicle that runs on rails in cities, frequently along streets, where the rails are laid flush with the road surface.
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Most trams are powered by electricity from an overhead wire, but they can also be horse-drawn, pulled by underground [[cable]], steam-powered, or powered by electricity from a surface or underground [[conduit]].
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Most trams are powered by electricity from an overhead wire, but they can also be horse-drawn, pulled by underground [[cable]], steam-powered, or powered by electricity from a surface or underground conduit.
Trams have historically been single vehicles, but two or three coupled together have been used in places, and articulated trams are becoming more common.
Trams have historically been single vehicles, but two or three coupled together have been used in places, and articulated trams are becoming more common.