The extended track will allow for as many as 15 trains to run simultaneously, and the sole-source purchase of vehicles from Bombardier will allow for three more four-car trains and two spare cars.
The people-mover train debuted at the Atlanta airport with the opening of the terminal in 1980. The train system has undergone a series of extensions and expansions as the airport has grown and added more concourses through the decades and an international terminal in 2012.
A second people-mover system at the airport began operations in 2009. That above-ground SkyTrain takes passengers to the rental car center that opened at the same time, as well as to the Georgia International Convention Center.
In 2010, the underground people-mover train to the concourses was renamed the Plane Train to distinguish it from the SkyTrain. Marietta resident Don Auensen won an airport contest by suggesting the Plane Train name.