The City Tunnel is an 11-kilometre (6.8 mi) rail link in Malmö, Sweden, running between Malmö Central Station and the Öresund Bridge, of which six kilometres (3.7 mi) under Malmö city centre is in a tunnel, to increase capacity on the Skåne County network by changing Malmö C from a terminus to a through station. Including necessary connections to other railways it is 17 km (11 mi). It is a part of the Öresund Line to Copenhagen Central Station. The work was projected to cost 9.45 billion SEK. Construction began in March 2005, and the line was inaugurated by King Carl XVI Gustaf of Sweden on 4 December 2010. Revenue service commenced on 12 December 2010.