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In page Erfurt:
"The Erfurt public transport system is marked by the area-wide Erfurt Stadtbahn (light rail) network, established as a tram system in 1883, upgraded to a light rail (Stadtbahn) system in 1997,[1] and continually expanded and upgraded through the 2000s. Today, there are six Stadtbahn lines running every ten minutes on every light rail route.[citation needed]
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