TRAX (light rail)

TRAX is a light rail system in the Salt Lake Valley of Utah, in the United States, serving Salt Lake City and many of its suburbs throughout Salt Lake County. The system's official name, Transit Express, is rarely, if ever, used. The system is operated by the Utah Transit Authority (UTA). All TRAX trains are electric, receiving power from overhead wires.

TRAX has 52 stations on three lines. The Blue Line provides service from Downtown Salt Lake City to Draper. The Red Line provides service from the University of Utah to the Daybreak Community of South Jordan. The Green Line provides service from Salt Lake City International Airport to West Valley City. In 2025, the system had a ridership of 13,279,100, or about 43,400 per weekday as of the fourth quarter of 2025.

TRAX operates seven days a week, with the exception of some holidays. It operates Monday through Friday from approximately 4:30 a.m. to 11:30 p.m. with a 15-minute headway on each line during the entirety of operating hours. It operates weekends from approximately 5:00 am to nearly midnight, with a 15-minute headway on Saturdays and a 30-minute headway on Sundays.

Outside of major events, based on projected ridership, the Blue Line typically operates 2-3 car trains, the Green Line 2 car trains, and the Red Line 2-4 car trains.^{[citation needed]}

TRAX has 117 active light rail vehicles:

In 2024, UTA ordered 20 Stadler Citylink vehicles, with upwards to 80 vehicles, to replace the Siemens SD-100 and SD-160 LRVs. They are expected to enter service in 2028. They will be built in Salt Lake City.

To handle the increased crowds during the 2002 Winter Olympics, 29 Kinki Sharyo LRVs were borrowed from the Dallas Area Rapid Transit (DART) between 2001 and 2003.

29 UTDC LRVs (1041–1069) were purchased second-hand from the Santa Clara VTA in 2004 and refurbished for service on TRAX. These were withdrawn from service in 2018.^{[citation needed]}