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Light rail - Wikipedia, the free encyclopedia |
 | | Light rail is the successor term to tram (streetcar or trolley in North American English) in many locales, although the term is most consistently applied to modern or modernised tram or trolley operations employing features more usually associated with metro or subway operations, including exclusive rights-of-way, multiple unit train configuration and signal control of operations. |
| | Light rail is generally powered by electricity, usually by means of overhead wires, but sometimes by a live rail, also called third rail (a high voltage bar alongside the track), requiring safety measures and warnings to the public not to touch it. |
| | Light rail systems are generally cheaper to build than heavy rail, since the infrastructure does not need to be as substantial, and tunnels are generally not required as is the case with most metro systems. |
| en.wikipedia.org /wiki/Light_rail (5395 words) |
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