An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
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.
PHMSA encourages 9-1-1 call centers—including both emergency communications centers and public safety answering points—to download, register, train on, and use available technologies, such as the AskRail® application (AskRail app or application), that are designed to provide critical information...
PHMSA is issuing this safety advisory to notify the public that BJ MedQuip Repair Services, Inc., located at 6495 S. Highway 48, Mannford, OK 74044, marked specification cylinders as authorized for hazardous materials transportation without properly requalifying the cylinders. More than 10,000...
The U.S. Department of Transportation’s (DOT) Pipeline and Hazardous Materials Safety Administration (PHMSA) is providing notice that it will not take enforcement action against trained collecting personnel who transport the below-specified over-pressurized cylinders for the purpose of venting...
On April 13, 2023, PHMSA approves DNV’s petition for Phast version 8.4 as an alternative model for calculating the flammable vapor dispersion exclusion zones under 49 C.F.R. § 193.2059(a). The Final Environmental Assessment discusses the analysis of the validation results. Other documentations...
The Onshore Gas Gathering FAQs for Type C and Type R Pipelines include general guidance on gas gathering and specific guidance on requirements applicable to Type C and Type R gathering lines.
PHMSA published a Safety Advisory Notice on the "Transportation of Electric Vehicles Containing Lithium Batteries Damaged by Extreme Weather Events" to serve as a reminder of PHMSA's current requirements under the Hazardous Materials Regulations for transport and shipment of electric vehicles...
PHMSA issues responses to FAQs addressing questions about the upcoming phaseouts for transporting ethanol in DOT-111 tank cars. These FAQs will respond to questions and requests for guidance from railroads and tank car shippers on the upcoming May 1 and July 1 ethanol phaseout deadlines.
In relation to its final rulemaking entitled "Pipeline Safety: Safety of Gas Transmission Pipelines: Repair Criteria, Integrity Management Improvements, Cathodic Protection, Management of Change, and Other Related Amendments," PHMSA is providing notice that in certain limited circumstances...
In relation to its final rulemaking entitled "Pipeline Safety: Safety of Gas Transmission Pipelines: Repair Criteria, Integrity Management Improvements, Cathodic Protection, Management of Change, and Other Related Amendments," PHMSA is providing notice that it will exercise regulatory...