Summary

Positive Train Control (PTC) refers to technology that is capable of preventing train-to-train collisions, overspeed derailments, and casualties or injuries to roadway workers (e.g., maintenance-of-way workers, bridge workers, signal maintainers) operating within their limits of authority as a result of unauthorized incursion by a train. PTC is also capable of preventing train movements through a switch left in the wrong position. PTC systems vary widely in complexity and sophistication based on the level of automation and functionality they implement, the system architecture utilized, the wayside system upon which they are based (i.e., non-signaled, block signal, cab signal, etc.), and the degree of train control they are capable of assuming.

Prior to October 2008, PTC systems were being voluntarily installed by various carriers. However, the Rail Safety Improvement Act of 2008 (RSIA) (signed by the President on October 16, 2008, as Public Law 110-432) has mandated the widespread installation of PTC systems by December 2015.

Currently, all of the affected railroads are aggressively pursing development of the PTC implementation plans required by the RSIA and are adapting their individual PTC systems to maximize interoperability. The BNSF Railway Company (BNSF), Union Pacific Railroad (UP), Norfolk Southern Railway (NS), and CSX Transportation (CSXT) are leading the interoperability effort for technologies based on the Electronic Train Management System (ETMS) for rail traffic outside of the Northeast Corridor (NEC). The National Passenger Rail Corporation (Amtrak) is undertaking similar action for rail traffic in the NEC using the Advanced Civil Speed Enforcement System (ACSES).

The Federal Railroad Administration (FRA) is supporting all rail carriers that have statutory reporting and installation requirements to install PTC, as well as rail carriers that are continuing to voluntarily implement PTC, through a combination of regulatory reform, project safety oversight, technology development, and financial assistance. 


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