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| | Trolleybus - Encyclopedia, History, Geography and Biography (Site not responding. Last check: 2007-10-11) |
 | | New trolleybus near Harvard Square, Cambridge, MA Trolleybuses are particularly important in hilly cities, as electric power is more effective than diesel in climbing steep hills, and trolleybuses' rubber tires have better adhesion than streetcars' steel wheels upon steel rails. |
 | | Trolleybuses are used extensively in large European cities such as Athens, Moscow, Kiev and Belgrade, as well as smaller ones, like Lausanne or Nancy. |
 | | Cities, especially located on hills, have choosen trolleybuses over traditional buses because the electric engine is capable of producing much more power than a diesel engine. |
| www.arikah.net /encyclopedia/Trolley_bus (1145 words) |
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