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| | Rapid transit - Wikipedia, the free encyclopedia |
 | | A rapid transit, underground, subway, tube, elevated, or metro(politan) system is a railway system, usually in an urban area, with a high capacity and frequency of service, and grade separation from other traffic. |
 | | Elevated railways were a popular way to build mass transit systems in cities around the turn of the twentieth century, but they have fallen out of favour; and many elevated lines were later demolished, being replaced by subways or buses. |
 | | The first underground railway in continental Europe was the Tünel, an underground 573-meter funicular between the quarters of Beyoğlu and Galata in the European part of Istanbul, completed in 1875 by French engineers on behalf of the Ottoman Empire. |
| en.wikipedia.org /wiki/Rapid_transit (3777 words) |
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