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X12 transaction guide · Transportation

EDI 451 Railroad Event Report

The X12 document a service provider uses to communicate activities associated with the movement of goods by rail.

Sent by
Rail carrier or service provider
Received by
Shipment sponsor, shipper or other party
Standard
ANSI ASC X12

What is an EDI 451?

The EDI 451 Railroad Event Report is the ANSI X12 transaction set a service provider uses to communicate activities associated with the movement of goods. Events include arrivals, departures, placements, pulls and interchanges.

It is part of a family of rail service management transaction sets (451 to 456) that support shipment tracking and service management across carriers. Shippers and service sponsors use event data to track shipments and measure performance against commitments. Events are typically reported as they occur. Each event carries a time and place.

How the EDI 451 worksDiagram of the EDI 451 Railroad Event Report. Rail carrier or service provider sends it to shipment sponsor, shipper or other party. It usually starts the exchange. It is usually followed by 997. Inside the ISA, GS and ST envelopes, X12 release 008010 requires, in the heading: the required ED loop with ED (Equipment Description). 0 optional loops are listed by their first segment.How the EDI 451 worksRailroad Event Report: who sends it, where it fits and what the standard marks required1 WHERE IT FITSUSUALLY FOLLOWSStarts the exchangeEDI 451SENDERRail carrier or serviceproviderRECEIVERShipment sponsor,shipper or other party997 or 999 acknowledgment back, if the partners agreeUSUALLY FOLLOWED BY997FunctionalAcknowledgment2 WHAT X12 RELEASE 008010 REQUIRESInterchange: sender and receiver IDsISA … IEAFunctional group, ID code EVGS … GETransaction set 451ST … SEHEADINGRequired loop ED · repeats up to 999EDEquipment DescriptionBlue box: required loop. Optional loops are listed by the segment that starts them; when a loop is used, that first segment is required. Optional segmentsoutside loops are not drawn.Structure: required segments and loops in the X12 008010 listing for the 451. Your trading partner's implementation guide adds its own requirements.
How the EDI 451 worksDiagram of the EDI 451 Railroad Event Report. Rail carrier or service provider sends it to shipment sponsor, shipper or other party. It usually starts the exchange. It is usually followed by 997. Inside the ISA, GS and ST envelopes, X12 release 008010 requires, in the heading: the required ED loop with ED (Equipment Description). 0 optional loops are listed by their first segment.How the EDI 451 worksRailroad Event Report: who sends it, where itfits and what the standard marks required1 WHERE IT FITSUSUALLY FOLLOWSStarts the exchangeEDI 451SENDERRail carrier orservice providerRECEIVERShipmentsponsor, shipperor other party997 or 999 acknowledgment back, if the partnersagreeUSUALLY FOLLOWED BY997Functional Acknowledgment2 WHAT X12 RELEASE 008010 REQUIRESInterchange: sender and receiver IDs (ISA… IEA)Functional group, ID code EV (GS … GE)Transaction set 451 (ST … SE)HEADINGRequired loop ED · repeats up to999EDEquipment DescriptionBlue box: required loop. Optional loops are listedby the segment that starts them; when a loop isused, that first segment is required. Optionalsegments outside loops are not drawn.Structure: required segments and loops in the X12008010 listing for the 451. Your trading partner'simplementation guide adds its own requirements.

How to read this diagram: the top row shows who sends the 451, to whom, and which documents usually come before and after it. The lower part shows what X12 release 008010 itself requires: the envelopes around the 451 and the segments and loops the standard marks as required, area by area. Optional loops are listed by the segment that starts them rather than drawn in full. This is the standard's minimum, not a trading partner's requirement: each partner's implementation guide usually makes some optional loops mandatory, restricts the codes and may use a different release.

Expand diagram Download SVG

When it is used

  • Reporting rail movement events
  • Supporting shipment tracking
  • Measuring service against commitments

Where it fits in the document flow

This document 451 Railroad Event Report
Usually followed by 997 Functional Acknowledgment

Structure

Mandatory segments in the 451 (X12 release 008010)

The segments X12 release 008010 marks as mandatory at their level, in order. Segments inside optional loops are needed only when the loop is used. This is the standard's requirement, not your trading partner's: each partner's implementation guide names the release it uses, adds the optional segments it requires and restricts the values. The requirement status comes from one published X12 reference listing and has not been checked against a second source.

  • ST
  • ED
  • SE

Practical example

The 451 in practice

A railroad reports events for a unit train of coal: departure from the mine, arrival at an interchange, interchange to the next railroad and arrival at the power plant. The power company's system receives the 451 events and tracks the train against the delivery schedule.

Implementation

Implementation considerations for the 451

  • Map rail event codes to your own shipment milestones.
  • Combine events from all carriers on interline moves.
  • Compare events with service commitments (453).
  • Report events promptly so tracking stays current.

How ECOM helps

Automate the 451 with ECOM

Industry

Trucking and Transportation

Load tenders, responses, status and freight invoices for carriers, brokers and shippers, integrated with the TMS.

Solution

Supply Chain Visibility

Track orders, shipments and invoices across partners and catch exceptions early.

Solution

Logistics Automation

Automate tenders, status updates, freight invoices and warehouse orders with logistics partners.

More general questions about EDI are answered in the EDI FAQ.

Related transactions

Related transportation documents

All 80 transportation documents

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