A web-based rail yard inventory system, Rail Manager® extends the use of Automatic Equipment Identification (AEI) systems to aid in the management of railcars in rail facilities and yards. Rail Manager® continuously identifies,in real time, the location of each railcar on a graphical map of the yard. With the optional Rail Logger® system and Rail Mobile® system, Rail Manager® is designed to maximize the utilization and availability of rolling stock by tracking locations, including arrivals and departures of railcars within rail yard.