The DART Orange Line is an open and fully operational light rail transit line connecting downtown Dallas with the City of Irving and Dallas/Fort Worth (DFW) International Airport northwest of Dallas. The line runs concurrently with the existing Green Line (which opened in 2009 and 2010) from Downtown Dallas to Bachman Station in Northwest Dallas. From Bachman Station, the Orange Line heads northwest to the Las Colinas Urban Center and the newly constructed Irving Convention Center and on toward DFW Airport.

The 14.5-mile project was opened in three sections: Irving-1: Bachman Station to Irving Convention Center Station (5.4 miles, 3 stations); Irving-2: Irving Convention Center Station to Belt Line Rd. (3.9 miles, 2 stations); and Irving-3: Belt Line Rd. to DFW Airport Terminal A (5.2 miles, 1 station at DFW Airport). The TIFIA loan for this project will advance construction on Irving-3, the third phase of the light rail Orange Line extension project.

Irving-3 is expected to reduce automobile dependence, and therefore roadway congestion, average travel times, and automobile emissions, by providing direct access to Terminal A of the Dallas/Fort Worth Airport. Through 2032, the project is expected to reduce annual vehicle miles traveled and greenhouse gas emissions by approximately 110 million miles and 535,242 metric tons, respectively. Additionally, it is expected to generate travel time savings of an estimated $389 million and add several safety considerations.