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

Hazardous Materials: Safety Requirements for External Product Piping on Cargo Tanks Transporting Flammable Liquids

Withdrawal of notice of proposed rulemaking.

PHMSA is withdrawing the notice proposing to stop the transportation of flammable liquid material in unprotected external product piping on DOT specification cargo tank motor vehicles as mandated by the "Fixing America's Surface Transportation Act" or the "FAST Act". Although PHMSA is withdrawing its rulemaking proposal, the agency will continue to consider methods to improve the safety of transporting flammable liquid by cargo tank motor vehicle. PHMSA will also continue to analyze current incident data and improve the collection of future incident data to assist in making an informed decision on methods to address this issue further, if warranted.

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