The Blue Line is a light rail line on the TRAX system in the Salt Lake Valley of Utah, in the United States, operated by the Utah Transit Authority (UTA). It is the first line of the TRAX system completed. The line opened on December 4, 1999, one year ahead of schedule after two years of construction. In addition to Salt Lake City, it also serves the communities of South Salt Lake, Murray, Midvale, Sandy and Draper. The line was known as the North/South Line or the Sandy/Salt Lake Line until color names were adopted for each TRAX line in August 2011. An extension of the line to Draper began service on August 18, 2013.