Duke University Medical Center Patient Rapid Transit

Personnel Rapid Transit
Info
Locale	Durham, NC, US
Transit type	People mover
Number of stations	3
Operation
Began operation	1979-12-08
Ended operation	2009[verification needed]
Operator(s)	Duke University
Number of vehicles	3
Technical
Track gauge	concrete guideway

Duke University Medical Center Patient Rapid Transit or Personnel Rapid Transit (PRT) was an automated people mover system located at the Duke University Medical Center in North Carolina, in the United States.^[1] The system was in operation from 1979 to 2009, and service is now discontinued.^[2] The PRT was notable for having cars propelled by a linear induction motor and suspended on a bed of compressed air^[3] similar to a hovercraft. Uniquely, the cars could move sidewards, as well as backwards and forwards.^[3]

The proclaimed "horizontal elevator" system was designed by Otis Elevator Company during the 1970s, installed beginning in 1977 and opened on December 8, 1979. The people mover was provided with three driverless Otis Hovair vehicles^[4] which have a hinged-window at each end for emergency exit.^[5]

The concrete guideway was built as double track, connecting the three stations at Duke South, Duke North and Parking Garage II via a tunnel under Erwin Road.^[6]

Decommissioning

The 0.25-mile (<400 m) section between Duke South and Duke North was closed permanently on October 15, 2008 to allow for expansion of the hospital buildings.^[2]

The remaining section connecting Duke Parking Garage II with Duke North Hospital was closed at the end of 2008—2009^{[verification needed]}. The doorway for the station at Parking Garage II was permanently boarded up and turned into a wall. The leftover tracks and infrastructure remain.^{[verification needed]}

Technology

The Hovair technology has been installed around the world. Later variants have used the same air-cushion technology, but propelled the vehicles by wire cable, such as at the Getty Center in Los Angeles.^[4]

References

1. ^ "PRT Supervisor, Senior". Duke University Job Description. Duke University Human Resources. 2007-12-01. Archived from the original on 2007-07-09. http://web.archive.org/web/*/http://www.hr.duke.edu/jobs/descr_campus/select.php?ID=352. Retrieved 2009-10-17. "... Personnel Rapid Transit system utilized to transport patients, employees, visitors and supplies between Duke Hospital North, Duke Hospital South and Parking Garage II." 
2. ^ ^{a b} "Tram scrams Oct. 15". Inside Duke Medicine. 2008-09-01. http://insidedukemedicine.org/news/tram-scrams-oct.-15/. Retrieved 2009-10-17. "in the 1970s when it was announced that a futuristic "horizontal elevator" would ferry ... between the Duke Hospital and its planned North Division. ... the inaugural ride on Dec. 8, 1979, ... Otis Elevator Co. had designed an innovative, pilotless shuttle that travels "on a cushion of air."" 
3. ^ ^{a b} Wessner, Laura (December 1978). "Air-cusion people mover". Popular Science (Bonnier Corporation) 213 (No. 6): 64. ISSN 0161-7370. "three 22-passenger ... no rotating parts ... a linear-induction motor propels the cars ... ice, rain and snow don't limit performance ... the cars can move sideways" 
4. ^ ^{a b} Richards, Brian (2001). Horizontal elevators and peoplemovers. Taylor & Francis. p. 130. ISBN 9780415261425. http://books.google.com/books?id=S7KQ-SOB8_4C&pg=PA130. Retrieved 2009-10-17. "developed by Otis ... their first vehicle was called Hovair" 
5. ^ Peacock, Richard D. (Jan 1979). Fire Safety Guidelines for Vehicles in a Downtown People Mover System. Washington: Center for Fire Research, National Engineering Laboratory, National Bureau of Standards. 
6. ^ "Clinic Parking Information". Pediatric Urologic Care. Duke University Division of Urology. http://urology.surgery.duke.edu/modules/div_urol_pc/index.php?id=3. Retrieved 2009-10-17. "a walkway and monorail beneath Erwin Road from the garage to Duke Hospital" 

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