Key Performance Metrics

AAR Train Speed

AAR measure of the time from origin departure until final arrival, excluding intermediate terminal dwell. Calculated by divided train miles by train hours for through freight trains.

System inventory

AAR measure of average daily inventory of all freight cars in revenue fleet regardless of location or status. Includes cars located on shortline railroads, cars delivered to customer facilities and stored cars. Articulated cars are counted as a single unit.

Terminal dwell

AAR measure of average hours a car resides at the specified terminal location. Begins with train arrival, customer release or interchange receipt. Ends with train departure, customer placement, interchange offering or delivery. Excludes cars that move through a terminal on run-through trains.

Operating Car Inventory

Daily snapshot of cars in normal movement, hold, or released at customer status on Union Pacific. Excludes cars at industry for loading or unloading, offline or stored. Articulated well and spine cars counted individually. Excludes non-revenue cars.