TRAX Guide
Step-by-step guide to using UTA Tracker to follow TRAX Blue Line, Red Line, and Green Line trains with live map positions, stop arrivals, and service alerts.
Page Sections
Quick answer
Use UTA Tracker's TRAX map when you need the current train position, then open the route page for the timetable and the stop board for station arrivals.
Map context
Use the TRAX map to separate Blue, Red, and Green Line trains, watch the downtown trunk, and check station-by-station arrivals before you leave.
Rider note
Airport, downtown, university, Daybreak, and South Jordan corridors in one map view
Rider note
Line-color filtering makes it easy to isolate one service pattern
Rider note
Station boards combine published times with live projections
Embedded map preview
Live TRAX map filtered to light rail so riders can inspect Blue, Red, and Green Line trains while reading the guide.
TRAX map
Live map embed
Lazy-loaded so the guide stays readable before the live app frame starts.
Guide
TRAX is Utah Transit Authority's light-rail network serving the Salt Lake Valley. Three color-coded lines — Blue, Red, and Green — connect the airport, downtown Salt Lake City, the University of Utah, South Jordan, West Valley City, and Draper. If you're wondering where your TRAX train is right now, real-time tracking is the fastest answer.
The best way to see live TRAX positions is to open UTA Tracker and select the TRAX view. Each active train appears as a moving marker on the map, colored by line. The map refreshes continuously using official UTA GTFS-realtime vehicle position data, so you're always seeing the most current snapshot.
Each vehicle marker shows the line color and direction of travel. A label indicates the route designation and terminus. If a train is running ahead of schedule it may show as slightly early; a delay badge appears when the GTFS-realtime trip update reports a positive delay. The line shapes on the map let you orient yourself quickly — pick the nearest stop along the colored corridor.
Tap any stop on the TRAX map to open the stop arrival board. You'll see upcoming trains sorted by estimated arrival time, with distinction between the scheduled time (from the static timetable) and the live projected time (adjusted from real-time trip updates). When the tracker shows “2 min” next to a line, that means the train is projected to reach that stop in two minutes based on its current position and trip progress.
UTA publishes service alerts through its GTFS-realtime alerts feed. UTA Tracker surfaces these automatically — if there's a track outage, shuttle replacement, or major delay on a TRAX line, an alert banner appears on the relevant route or stop page. Always check alerts before planning a trip during peak maintenance windows or special events near downtown Salt Lake City.
Guide answers
Use UTA Tracker's TRAX map when you need the current train position, then open the route page for the timetable and the stop board for station arrivals.
Use Embedded TRAX live map for live positions and Open Blue Line timetable for schedule context. The map helps with current vehicle movement, while the timetable page is better for published stop order and service-day checks.
This guide uses Official UTA GTFS schedules, GTFS-realtime vehicle positions, trip updates, service alerts, and UTA Tracker source notes. The guide was last reviewed on June 25, 2026.
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UTA Tracker is a third-party transit tracker built on public Utah Transit Authority data feeds and open mapping/reference sources.
