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]].
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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Trams have historically been single vehicles, but two or three coupled together have been used in places, and [[articulated]] trams are becoming more common.
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Trams have historically been single vehicles, but two or three coupled together have been used in places, and articulated trams are becoming more common.
Many tram systems were closed down in the 1940s to 1960s, but trams have been making a comeback with many new lines opening in recent years.
Many tram systems were closed down in the 1940s to 1960s, but trams have been making a comeback with many new lines opening in recent years.