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Compliance Guide Update Service May 2015

May 8 Department Of Transportation


Hazardous Materials : Enhanced Tank Car Standards and Operational Controls for High- Hazard Flammable Trains

FR 80 49 CFR Parts 171, 172, 173, 174 and 179 26644-26750

Final Rule


Summary: In this final rule, the Pipeline and Hazardous Materials Safety Administration (PHMSA), in coordination with the Federal Railroad Administration (FRA), is adopting requirements designed to reduce the consequences and, in some instances, reduce the probability of accidents involving trains transporting large quantities of flammable liquids. The final rule defines certain trains transporting large volumes of flammable liquids as ‘‘high-hazard flammable trains’’ (HHFT) and regulates their operation in terms of speed restrictions, braking systems, and routing. The final rule also adopts safety improvements in tank car design standards, a sampling and classification program for unrefined petroleum-based products, and notification requirements. These operational and safety improvements are necessary to address the unique risks associated with the growing reliance on trains to transport large quantities of flammable liquids. They incorporate recommendations from the National Transportation Safety Board (NTSB) and from the public comments, and are supported by a robust economic impact analysis.


Dates: Effective Date: This final rule is effective July 7, 2015.


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