The 13km extension of metro Line A will connect La Paz with Chalco and include eight stations which will serve an estimated 314,000 passengers per day. The 4km extension of metro Line 12 will connect Mixcoac to an interchange with Line 1 at Observatorio. Construction on both lines is expected to start this year.\r\nSTCalso confirmed plans to launch an international tender for 45 new trains for Line 1 in March, with an estimated cost of Pesos 10.5bn ($US 700m). According to Mr Joel Ortega, STC CEO, the contract will only be awarded to a company with the backing of a market study. Alstom, Bombardier and CAF are all expected to bid for the tender.