
Since the S Line is intended for shorter trips than TRAX it has more standing room and space for bicycles. However, Mayor Becker suggested that as the S Line evolves (Phase 2 and beyond) the cars used could move "toward a more traditional streetcar design." The cars used for the S Line have a silver and white color scheme, as opposed the red, white, and blue color scheme used by the rest of UTA's vehicles (buses, TRAX trains, and the FrontRunner train). The decision to use the same car model resulted in substantial savings as it allows UTA to use the same maintenance facilities used for TRAX. The S Line utilizes the same Siemens S70 US cars used by the TRAX Red and Green lines. (These road crossing also include crosswalks that parallel the tracks, and pedestrian traffic lights as well.) The fare for the S Line is the same as for TRAX and the same methods of payment (including the FAREPAY card) are accepted. Accordingly, the streetcars may be required to slow down or even stop prior to crossing roadways. Instead many streetcar crossings have traffic lights, while several are controlled by stop signs.

Because of its slower speed, most S-line at-grade road crossings do not have barrier arms that stop vehicular traffic.

Other differences are that the S Line operates with a single vehicle, rather than a "train" of vehicle. The S Line also differs from TRAX in that, for the most part, it only has a single track (with passing tracks) and it operates with more frequent stops for easy pedestrian access. While fairly similar to UTA's TRAX light rail the S Line operates at a substantially slower speed, with a top speed of 25 miles per hour (40 km/h).

It is operated by UTA and is UTA's first streetcar line. It opened for service on December 8, 2013. It is a joint project between UTA, Salt Lake City, and South Salt Lake. The S Line, or S-Line (formerly known as Sugar House Streetcar), is a public transit streetcar line in northeastern Salt Lake County, Utah, in the United States, that connects the business district of the Sugar House neighborhood of Salt Lake City with the neighboring city of South Salt Lake, as well as the Utah Transit Authority's (UTA) TRAX light rail system.
