The Blue Line is a light rail line in the system of mass transit in Dallas, Texas (USA), operated by the Dallas Area Rapid Transit system.

After leaving Mockingbird, the line diverts to the northeast towards White Rock Lake.

At the time, the line only ran from Illinois to Pearl in the northeast corner of downtown.

[1] DART's 2030 Transit System Plan, approved in October 2006, calls for the Blue Line to be extended south beyond Ledbetter to the University of North Texas at Dallas, as well as a branch along Bonnie View road to Interstate 20 and the SouthPort Intermodal Terminal.

[2] In October 2014, construction began for a 2.6-mile extension south from Ledbetter station to the University of North Texas at Dallas, adding two new stations to the line: Camp Wisdom and UNT Dallas.