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U.S. Department of Transportation

Federal Highway Administration

1200 New Jersey Ave. S.E.
Washington, D.C. 20590

January 24, 2008

In Reply Refer To: HSSD/WZ-266

Mr. Andrew Markunas, P.E.
Manager, Work Zone Traffic Control Section
Bureau of Highway Safety and Traffic Engineering
Pennsylvania Department of Transportation
400 North Street
Harrisburg, PA 17120

Dear Mr. Markunas:

In your letters of December 1 and December 20, 2007, you requested the Federal Highway Administration’s (FHWA) acceptance of the Pennsylvania Department of Transportation’s (PennDOT) H-base and X-base portable sign stands as a crashworthy traffic control device for use in work zones on the National Highway System (NHS). Accompanying your letter was the FHWA Office of Safety Design form that included a drawing and a detailed description of the sign stands, test report, and videos of the crash tests and LS-DYNA crash simulations. The drawings and detailed descriptions are enclosed with the acceptance form for the H-base and X-base portable sign stands. You requested that we find these sign stands acceptable for use on the NHS under the provisions of National Cooperative Highway Research Program (NCHRP) Report 350 "Recommended Procedures for the Safety Performance Evaluation of Highway Features".

This letter is the acknowledgement of the FHWA's acceptance of your requests. The original completed forms have been modified by the addition of the FHWA acceptance letter number, the date of our review, and minor editorial changes. The form will be posted on our website in the near future.

Please note the following standard provisions that apply to the FHWA letters of acceptance:

Sincerely yours,

David A. Nicol

David A. Nicol   
Director, Office of Safety Design
Office of Safety


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