GM Aerotrain

above ad found on http://goawaygarage.blogspot.com/

above and below were taken at the 1964 Worlds Fair

one has been preserved and is at the at the Museum of Transportation in St. Louis, Missouri, and Car Nut commented to say that one is rusting away at the National Railway Museum in Greenbay Wisconsin
These photos are from http://www.jalopyjournal.com/forum/showthread.php?t=428585&page=477