[Header] PHMSA - U.S. Department of Transportation - Pipeline and Hazardous materials Safety Adminis

The items below are the currently open NTSB recommendations regarding rail and the OHMS responses. For copies of the specific letters containing the NTSB/OHMS dialog, click the link for the specific item and review the list of "Related Downloads" on the right.

NTSB Classifications:

  • OAR - Open Acceptable Response
  • OAA - Open Acceptable Action
  • OAAR - Open Acceptable Alternative Action
  • OUA - Open Unacceptable Action
  • OUR - Open Unacceptable Response
  • UCL - Unclassified (until NTSB Classifies)
Currently Open Recommendations
R-07-4 Immediate Notification to Emergency Responders; OAR Apr 24, 2007
R-08-13 Optimum Separation Requirements; OAR May 22, 2008
R-12-5 Enhanced protection of DOT-111 Tank Cars used in ethanol and crude oil service; OAR Mar 2, 2012
R-12-6 Bottom Outlet Valve Closure; OAR Mar 2, 2012
R-12-7 Adoption of American Association of Railroads (AAR) center sill or draft sill attachment designs; OAR Mar 2, 2012
R-14-4 Rail Routing of Trains Carrying Flammable Liquids; UCL Jan 23, 2014
R-14-5 Comprehensive Response Plan Threshold; UCL Jan 23, 2014
R-14-6 Shipper Testing and Documentation for Hazmat Classification; UCL Jan 23, 2014
Careers  |  Contact Us  |  No Fear  |  Privacy Policy  |  FOIA  |  Accessibility  |  FAQs  |  Web Policies  |  Site Map  |  Download Acrobat