Guadalajara's subway (Sistema de Tren Eléctrico Urbano, or "SITEUR") opened to the public in 1989. It utilized a 5.3 km, 7 station tunnel built in 1974 and used by trolley-buses up until 1988.
There are two lines, 24 km, and 22 stations. Line 1 runs 6.5 km and 7 stations underground, while the newer Line 2 is completely underground. Parts of Line 2 are still under construction, including an elevated portion. Three more metro lines are planned.