At present, there are 45 stations in operation along the CTrain light rail system. There are four legs in the system radiating directionally out into the suburbs from the downtown core that are connected by shared tracks along a downtown transit mall. They have been organized into two CTrain lines (identified as the Red Line and the Blue Line on network maps). The legs, as built in chronological order, are the South (1981), the Northeast (1985), the Northwest (1987), and the West (2012). Route 201 (Red Line) connects the South and Northwest lines; Route 202 (Blue Line) connects the Northeast and West lines. The two routes share most of the downtown line on the 7th Avenue South transit mall; the exception is the Downtown West – Kerby station, which serves only Route 202. The planned Route 203 - Green line will add about and 28 stations to the system by connecting a North leg to a Southeast leg, probably in a tunnel underneath the existing downtown transit mall. Construction on it is expected to start in 2017.