NTSB makes safety recommendations to AASHTO.July 17, 2012 -
According to NTSB, AASHTO should work with FHA to establish performance and selection guidelines for state transportation agencies to use in developing objective warrants for high-performance barriers applicable to new construction and rehabilitation projects. AASHTO should also evaluate adequacy of currently approved barrier systems, and revise chapter 5 of Roadside Design Guide to address unique considerations of shielding commercial passenger vehicles from point hazards.
NTSB Safety Recommendations H-12-25 through -27
National Transportation Safety Board
490 L'Enfant Plaza, SW
Washington, DC, 20594
Press release date: July 12, 2012
The National Transportation Safety Board recommends that the American Association of State Highway and Transportation Officials:
Work with the Federal Highway Administration to establish performance and selection guidelines for state transportation agencies to use in developing objective warrants for high-performance barriers applicable to new construction and rehabilitation projects where barrier replacement has been determined to be appropriate.
Evaluate the adequacy of barrier systems currently approved through National Cooperative Highway Research Program Report 350 or the Manual for Assessing Safety Hardware for safely redirecting commercial passenger vehicles and, if warranted, develop new barrier designs incorporating appropriate height and deflection characteristics capable of safely redirecting commercial passenger vehicles.
Once barrier testing has been completed and selection guidelines have been developed, revise chapter 5 of the Roadside Design Guide to incorporate guidance for the selection of high-performance barriers used in new construction and rehabilitation projects; this guidance should specifically address the unique considerations of shielding commercial passenger vehicles from point hazards.
The complete recommendation letter is available on the Web at the URL indicated above.
The letter is in the Portable Document Format (PDF) and can be read using the Acrobat Reader 5.0 or later from Adobe (http://www.adobe.com/prodindex/acrobat/readstep.html).
An archive of recommendation letters is available at http://www.ntsb.gov/recs/letters/letters.htm. Electronic versions of letters may or may not include enclosures; however, related publications, accident briefs, and aviation accident synopses may be found on the NTSB website.