(Click on the picture to expand) AEI Automatic Yard Tracking System is a program designed for the Union Pacific Railroad. Its purpose is to automatically track rail car movements into and out of a yard. This system was first implemented at the UP Neff Yard in Kansas City. Neff Yard's 6 departure tracks where monitored by this system, which used a combination of equipment such as AEI readers, wheel detectors, presence monitors, and switch point detectors to maintain a real-time inventory of cars on the departure tracks. Over a period of 6 months months the system tracked over 200,000 cars into Neff Yard's departure tracks and was over 98.5% accurate. Further enhancements to the system should increase the accuracy to over 99.2%. Currently there is no on-line documentation for this system, however, you can download a demonstration version of this program. The demonstration program will graphically show you the minute-by-minute inventory changes at Neff yard starting at midnight on 1 August 2000. Demonstration Program