USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Automated Train Operations Sensor Platform Framework Requirements

Document Series
Technical Reports
Federal Railroad Administration
Report Number
Subject Rolling Stock
Automated train operation, ATO, Sensor Platform, SP, ATO Sensor Platform, ATO SP, environmental monitoring, hazard detection, SP reference model, SP Framework, SP requirements, train control
Monday, February 5, 2024

The Sensor Platform (SP) Framework was a system engineering project conducted in conjunction with the Association of American Railroads-funded development of automated train operation (ATO) system requirements. The SP is a device that monitors the external environment in front of the train for potential hazards and interfaces with other locomotive onboard (OB) systems to obtain operational data, archive data, and report hazards detected. The SP Framework project supported the ongoing FRA- and AAR-funded ATO development effort by developing an interoperable SP reference model and beginning the decomposition of the existing SP requirements into the services defined by the SP reference model. The SP Framework project produced a completed draft SP reference model and started progress on revised SP-reference-model based requirements documentation.

DOT is committed to ensuring that information is available in appropriate alternative formats to meet the requirements of persons who have a disability. If you require an alternative version of files provided on this page, please contact