The Salt Lake City TRAX light rail system, operated by the Utah Transit Authority, has three light rail lines (and one commuter rail line). The oldest Blue line uses high-floor Siemens SD-100 and SD-160 railcars. The newer Green and Red lines use Siemens S70 low-floor railcars and are entirely level boarding stations. TRAX highlights that the newer lines are completely ADA accessible.
UTA also operates commuter rail called FrontRunner, and a streetcar called the S Line.

For previous posts on level boarding, see tag ‘level-boarding‘.