 In October 2006, a bid was launched for the construction of a Cercanías link between Chamartín Station and Terminal 4.Now finished, this single Cercanías Line (C-1) links Madrid Barajas Terminal 4, with Chamartín Station and Atocha AVE high-speed train stations.In June 2011 a decision was made to equip this link with dual gauge which will allow AVE high-speed trains to reach the airport station.