Tehran Metro Line 1, coloured red on system maps, is 36.6 kilometers (22.7 mi) long, of which 14.9 km (9.3 mi) are underground (from Tajrish station to Shush Station) and the rest runs at surface level. The number of stations along this line is 29 of which 18 stations are located underground and 11 above ground. As of 2005, the total capacity of line 1 is 650,000 passenger per day, with trains stopping at each station for 20 seconds. The trains are each made up of seven wagons, with a nominal capacity of 1,300 seated and standing passengers. The maximum speed of the trains is 80 km/h (50 mph) per hour which will be tempered to an average of 45 km/h (28 mph) per hour due to stoppages at stations along the route.