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

The Pipeline and Hazardous Materials Safety Administration is required by law to respond to safety recommendations issued by the National Transportation Safety Board (NTSB), an independent federal agency charged by Congress with investigating significant incidents that involve hazardous materials. Recommendations usually address a specific issue uncovered during an investigation or study and specify how to correct the situation.

Open Recommendations
The NTSB has 6 classifications for open recommendations:

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)

Closed Recommendations
NTSB closes recommendations when it has been determined that sufficient actions have been achieved. NTSB organizes its closed recommendations into 7 classifications:

CAR - Closed Acceptable Response
CAA - Closed Acceptable Action
CAAA - Closed Acceptable Alternative Action
CAAR - Closed Acceptable Alternative Response
CNLA - Closed No Longer Applicable
CUA - Closed Unacceptable Action
CUR - Closed Unacceptable Response


PHMSA's Office of Hazardous Materials updates the status chart when new information is available.

Status chart- by mode

Total Open Recommendations 21
Aviation 4
Highway 9
Intermodal 0
Rail 8

Status chart- by classification

Total Open Recommendations 21
Open - Acceptable Response 14
Open-Acceptable Alternate Response 3
Open-Unacceptable Response 1
Open-Unclassified 3


Look Up
Locate official documents and records.
NTSB Recommendations: Hazmat
PHMSA is required by law to respond to recommendations issued by the National Transportation Safety Board (NTSB).
NTSB Recommendations: Pipeline
PHMSA is required by law to respond to recommendations issued by the National Transportation Safety Board (NTSB).
One-stop site to find, view, and comment on Federal regulations and other Federal actions.
eCFR - Code of Federal Regulations
The Electronic Code of Federal Regulations (e-CFR) provides daly updates to the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government, including PHMSA.
CFR Retrieve by Citation
Title, Part, and either a Section Number or a Subpart letter are required.
Federal Register
The official daily publication for rules, proposed rules, and notices of Federal agencies and organizations, as well as Executive Orders and other presidential documents.
Grant programs offered by all Federal grant making agencies.
Provides citizens access to federal agency forms.
Government information by topic.
The United States Code
Provides codification by subject matter of the general and permanent laws of the United States.
Careers  |  Contact Us  |  No Fear  |  Privacy Policy  |  FOIA  |  Accessibility  |  FAQs  |  Web Policies  |  Site Map  |  Download Acrobat