The .5 mile ACTS (Automatically-Controlled Transportation System) was manufactured by the Ford Motor Company. It went into service in March 1976 and connected Level 2 of the mall with the adjoining Hyatt hotel. This was the first automated guideway transit line to operate as part of a shopping center. 
Drawing from the Ford Motor Land Development Corporation

Graphic from the Hyatt Corporation

Similar (but not identical) transit systems of the day included the .7 mile, light rail transit Tandy Subway, in Fort Worth (1963), and .3 mile monorail, at Honolulu's PEARLRIDGE CENTER (1975). The Fairlane ACTS was dismantled in 1989.
Photo from Ford Land Development