Cincinnati Airport People Mover

The Cincinnati Airport People Mover or Underground Train consists of an automated people mover that serves travelers of the Cincinnati/Northern Kentucky International Airport. It opened in 1994 to connect Terminal 3, now the Main Terminal, with Concourses A and B. The system was constructed by and was originally under the operation of Delta Air Lines.
Technology.
The Cincinnati Airport People Mover uses the same technology as the ExpressTram at Detroit Metropolitan Wayne County Airport and the HubTram at Minneapolis–Saint Paul International Airport.
History.
In September 1991, Delta Air Lines announced that a people mover system would be installed to connect their terminals as part of a major expansion undertaken in the early to mid 1990s. The system was originally announced as consisting of a pair of passenger trains, consisting of three cars seating a maximum of 71 passengers apiece for a total of 213 passengers per train. Constructed and installed by Otis using its "Hovair" hovertrain technology, at the time of its construction this $16.7 million facility was only the sixth of its kind installed by Otis throughout the world. The train would be inaugurated on following a dedication ceremony on June 9, 1994. In 2010, after Delta cut back on flights, the train skipped Concourse A station, and went between Terminal 3 (now the Main Terminal) and Concourse B. Since Concourse A reopened and Terminal 2 was closed in 2012, the train makes 3 stops: Main Terminal (Terminal 3), Concourse A and Concourse B round-trip. Today, the train handles up to 500 round trips. Trains departs every 90 seconds.