[5] Several years later, work began to convert the trolleybus tunnel and stations for use by a light rail line.

A few years later, Line 2 was constructed, generally running east from the city center; it opened on July 1, 1994.

[5][7] Because of the continuing heavy traffic congestion on the city's streets and the large numbers of users of the rail system, there are plans to extend Line 2 to the west.

Line 2 is entirely underground except for a non-passenger section at its east end, connecting the last station to the maintenance facility.

[10] In addition to the rolling stock, Alstom provided the communication, signalling, and traffic control systems for Line 3,[11] which began operation on September 12, 2020.

It's 21.4 km (13.3 mi) long, and its stations are: Line 4 is planned to run from Guadalajara to the municipality of Tlajomulco.

The planned stations are: The fleet consists of 78 articulated light rail vehicles,[16] each bi-directional ("double-ended") and powered from overhead lines.

The first 16 TLG-88 (Tren Ligero de Guadalajara, 1988) cars were built by Concarril in Ciudad Sahagún,[5] using propulsion equipment from Melmex (Mitsubishi Electric of Mexico).

[20] The TEG-15 is based on the TE-12 design for Servicio de Transportes Eléctricos del Distrito Federal in Mexico City.