Tram

A tram (also known as tramcar; in North America known as streetcar, trolley or trolley car) is a rail vehicle which runs on tracks along public urban streets (called street running), and also sometimes on separate rights of way. The lines or networks operated by tramcars are called tramways. Tramways powered by electricity, which were the most common type historically, were once called electric street railways. ... Tram lines may also run between cities and/or towns (for example, interurbans, tram-train), and/or partially grade-separated even in the cities (light rail). ... Tram vehicles are usually lighter and shorter than conventional trains and rapid transit trains. However, the differences between these modes of public transportation are often indistinct. Some trams (for instance tram-trains) may also run on ordinary railway tracks, a tramway may be upgraded to a light rail or a rapid transit line, two urban tramways may be connected to an interurban, etc. Most trams today use electrical power, usually fed by an overhead pantograph; in some cases by a sliding shoe on a third rail or trolley pole. If necessary, they may have dual power systems - electricity in city streets, and diesel in more rural environments. [Tram. Wikipedia]