A Metrolink locomotive decal on an MP36PH-3C stating that it is equipped with positive train control technology
Positive train control (PTC) is a family of automatic train protection systems deployed in the United States.[1] Most of the United States' national rail network mileage has a form of PTC. These systems are generally designed to check that trains are moving safely and to stop them when they are not.[2]
Positive train control restricts the train movement to an explicit allowance; movement is halted upon invalidation. A train operating under PTC receives a movement authority containing information about its location and where it is allowed to safely travel. PTC was installed and operational on 100% of the statutory-required trackage by December 29, 2020.[3]
^"Positive Train Control". Washington, D.C.: U.S. Federal Railroad Administration (FRA). Retrieved February 12, 2018.
^"PTC System Information". FRA. Retrieved February 12, 2018.
^"Steps Toward Full PTC System Implementation of Mandated Positive Train Control Systems; Based on Railroads' Self-reported Progress as of December 29, 2020". FRA. December 29, 2020.
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