Salt Lake City (Utah) Light Rail 'TRAX', operated by Utah Transit Authority (UTA):

41 stops
56.5 km
high-floor vehicles with street-level boarding; front door accessible via ramp

3 lines:

Blue Line (701): Salt Lake Central - Sandy Civic Center
Red Line (703): University Medical Center - Daybreak Parkway
Green Line (704): Salt Lake Central - West Valley Central

HISTORY

Delta Center (now Arena) - Sandy Civic Center (24 km, Dec. 1999)
Delta Center (now Arena) - University Medical Center (3.7 km to Stadium - Dec. 2001; 2.4 km to Med. Center - Sept. 2003)

On 27 April 2008, both lines were extended from Arena to Salt Lake Central Station (1.2 km, 3 stops), where transfer is provided to the new Frontrunner suburban rail service (which operates every 30 minutes throughout the day, and hourly in the evenings).
On 7 Aug 2011, the 8.2 km West Valley Line (Green Line) and the 17 km Mid-Jordan Line (Red Line) were opened.

In May 2008, 77 light rail vehicles of type S 70 were ordered from Siemens to be delivered by 2012, with an option for up to 180 additional cars.

UTA (Official Website)

UTA TRAX at Wikipedia

Lightrail.com

TRAX at nysubway.org

LightRailNow - Salt Lake City

TRAX at Utahrails.net