The Plane Train is an automated people mover system located at Hartsfield–Jackson Atlanta International Airport connecting all of its terminals and concourses.

Built by Westinghouse Electric Corporation, the system is the world's most heavily traveled airport people mover.

[2] The Plane Train operates in the secure area of the airport connecting the two landside terminals with its seven airside concourses.

[citation needed] During regular service, trains run bi-directionally in the tunnels in a pinched-loop configuration.

At the west end, trains use a cross-over track between Domestic Terminal and Concourse T stations to switch tunnels.

[5] Since the train operates inside the secure area of the airport, arriving passengers ending their journeys at the International terminal cannot use the train and must instead take a lengthy ground transportation detour around the perimeter of the airport to access facilities such as the car rental center or MARTA station.

This design was eventually scrapped since it was more of a benefit to passengers originating in or terminating in Atlanta, and by then nearly 70% of traffic through the airport was connecting from one flight to another.

Initially, the plan was for the people mover to connect the concourses in an exposed trench similar to the original AirTrans system at Dallas/Fort Worth International Airport (DFW).

Since Atlanta was vulnerable to similar conditions, the design was changed to have the people mover system fully underground to protect it from the elements.

[12] The layout of the current terminal was so well received, it was largely replicated at Denver International Airport in 1995 with Westinghouse installing a nearly identical people mover system there as well.

[17] In 1994, the airport opened Concourse E for international flights in preparation for the 1996 Summer Olympics, which were held in Atlanta.

[18] In 1996, the trains lengthened from three cars to four and large LED displays capable of showing eastern Asian CJK characters were added inside the vehicles to complement the original English text-only dot-matrix red-LED displays in preparation for more international flights.

Two of the system's original vehicles (cars #1 and #53) were then donated to the Southeastern Railway Museum in nearby Duluth, Georgia where they are currently on display.

[21] The four-week competition was held on Facebook and YouTube with participants submitting entries as comments to a behind-the-scenes video about the airport's automated people mover system.

[23] In 2012, the Maynard Holbrook Jackson, Jr. International Terminal and Concourse F opened along with another extension of the Plane Train.

Airport officials would nickname the voice "HAL" since it sounded like the similarly named computer in the film 2001: A Space Odyssey.

However, due to public outcry, the synthesized voice was quickly brought back and would remain for two more years.

They also reference the name of the train, used chimes, and added announcements for the International Terminal and Concourse F (which opened that year).

However by December 2024, Feingold's voice is currently being phased out in favor of Ryan Cameron, an Emmy-winning Atlanta native radio host.