High Quality Content by WIKIPEDIA articles! A premetro is a tramway or light railway which includes segments built to rapid transit standards, usually as part of a process of conversion to a metro railway, mainly by the construction of tunnels in the central city area. Because tunnels are expensive, some premetros have not progressed to the Metro stage, such as has happened in Bergsjon. Light rail or light rail transit (LRT) is a form of urban rail public transportation that generally has a lower capacity and lower speed than heavy rail and metro systems, but higher capacity and higher speed than traditional street-running tram systems. The term is typically used to refer to rail systems with rapid transit-style features that usually use electric rail cars operating mostly in private rights-of-way separated from other traffic but sometimes, if necessary, mixed with other traffic in city streets.

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