A light rail system, known as TRAX, is operated by the Utah Transit Authority (UTA) and currently has three lines. The Blue Line runs from Downtown Salt Lake City to Draper), the Red Line from South Jordan to the University of Utah, and the Green Line from West Valley City to the Salt Lake City International Airport (via Downtown Salt Lake City). There are currently 50 stops in the system. The original line opened in 1999 from downtown to Sandy, with the line to the University of Utah completed in 2001, and to West Valley City and South Jordan in 2011. In April 2013 the extension to the airport (Airport Station) on the Green Line opened and the extension to Draper (Draper Town Center Station) on the Blue Line opened in August 2013.