This transaction set communicates estimated arrival times and car scheduling information between transportation partners, typically sent by railroads or intermodal operators to receivers such as freight forwarders, shippers, or consignees. It is generally sent in response to a prior shipment order or service request to provide updated scheduling and routing details. The IS1 segment (Estimated Time of Arrival and Car Scheduling) contains the core scheduling data, the IS2 segment (Scheduled Events) specifies particular timing milestones for the shipment, and the N9 segment (Reference Identification) links the message to related transactions such as purchase orders or bills of lading.

Consider a scenario where Union Pacific Railroad sends an estimated arrival notification to XYZ Logistics regarding a carload of automotive parts. The message opens with an IS1 segment indicating the equipment number and expected arrival window, followed by multiple IS2 segments detailing when the car will be picked up at the origin yard, when it will depart that yard, and when it is forecast to reach XYZ Logistics’ receiving facility. The F9 and D9 segments (Origin Station and Destination Station) identify the starting and ending railheads, while N1 segments name the involved parties. Supporting segments such as H3 (Special Handling Instructions) may note any refrigeration requirements or equipment restrictions, and REF segments cross-reference the shipment to XYZ Logistics’ internal purchase order and the bill of lading number, enabling the receiver to match the incoming car to its warehouse systems before arrival.