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In page Paris Métro Line 14:

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The southern extension, in June 2007, from Bibliothèque François-Mitterrand to Olympiades grew traffic again.[2] Initially planned for 2006, work was delayed by the collapse of the courtyard in the primary school at 11, rue Auguste-Perret during the night of 14–15 October 2006.[3][4] Since then traffic has grown again: at the end of 2007, on average 450,000 passengers took the line on a working day.