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U.S. Department of Transportation

Federal Highway Administration

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

June 27, 2008

In Reply Refer To: HSSD/WZ-268

Mr. John Pasakarnis
Dicke Safety Supply
1201 Warren Avenue
Downers Grove, IL 60515

Dear Mr. Pasakarnis:

In your letters of February 5, 2008 you requested Federal Highway Administration (FHWA) acceptance of your company’s T155, AFC48, and P100 portable sign stands as crashworthy traffic control devices for use in work zones on the National Highway System (NHS). Accompanying your letter was the FHWA Office of Safety Design form and test report documentation including a CD compilation of relevant crash tests conducted by Karco Engineering, LLC. A summary of the test results that includes a drawing and specifications for each device are enclosed as a reference. You requested that we find these portable sign stands acceptable for use on the NHS under the provisions of National Cooperative Highway Research Program 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, including the additional requests outlined in your letters. It is important to note the T155 portable sign stand is acceptable for use with 0.125 inch thick aluminum, 4 foot by 4 foot by 5/8 inch plywood substrate with a minimum radius of the corners equal to three inches, and other substrates as outlined in your requests. The test data indicated that the radius corners help minimize the potential for windshield damage and occupant compartment penetration. The original completed forms for each portable sign stand have been modified by the addition of the FHWA acceptance letter number WZ-268. The forms, which are enclosed for reference, will be posted on our Web site in the near future.

Sincerely yours,

Signature of David A. Nicol, P.E.

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



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