After more than a 12-month delay, Warsaw’s second metro line opened Sunday morning. The 6 km line runs under the Vistula River, linking the Praga district with downtown and the western part of the city. It took five years to complete the PLN 4.2bn project. The city already has a north-south line, which opened in 1995. The M2 line was supposed to be running by fall 2013, two years after construction started. Mayor Hanna Gronkiewicz-Waltz thanked the public for their patience during Sunday’s opening. “’This will change all of Warsaw – not just those districts which it passes through,” she said.