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In page Rheingold (train):

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The new cars, together with improvements to the track along parts of its route in the mid-1960s, made the Rheingold the fastest train in Germany. In 1964, the train was scheduled to cover the 133.9 km (83.2 mi) Freiburg – Karlsruhe section in 59 minutes, working out to an average speed of 136.2 kilometres per hour (84.6 mph), which was the "fastest schedule in German rail history"[5] up to that time.