The Airport Transit System (ATS) at O’Hare International Airport will resume its round-the-clock service starting at 5 a.m. on Monday, according to a press release from the Chicago Department of Aviation.
The fully-automated 'people mover' trains transport passengers between Terminals 1, 2, 3 and 5.
It also transports people to the Multi-Modal Facility, or MMF, that houses the rental car center, Economy Parking Lot F, the Kiss ‘n’ Fly, several Pace routes and a Metra station.
Each three-car train can carry 147 passengers, and service is set to operate every three minutes.
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The trains had opened with partial service in November after several years of construction.
Shuttle buses will continue to provide 24-hour service through Sunday, May 1, as an additional option for passengers traveling between the four terminals of O’Hare and the MMF.