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In page 2006 Winter Olympics:

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The metro was finally opened to the public on 4 February 2006, after a 45-day delay. It operated on a shorter stretch (XVIII Dicembre (Porta Susa) to Fermi – 11 stations) than originally forecast; it finally reached the main railway station (Porta Nuova) and the rest of the city centre more than one year after the Games, in October 2007. For the duration of the Games, a single ticket (5 euros) covered use of both the metro and other means of public transportation for a whole day. However, during the Games, metro service stopped at 6:00 pm, making it impractical for spectators of evening events. Furthermore, the metro did not reach any of the Olympic venues. On the other hand, the bus service was heavily improved for the Games, although still inadequate at night hours.[citation needed]