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U.S. Department of Transportation

Federal Highway Administration

400 Seventh St., S.W.
Washington, D.C. 20590

March 21, 2007

Refer to: HSSD/WZ-227

Mr. Peter Speer
Davidson Traffic Control Products
Filtrona Extrusion, Inc.
3110 70th Avenue East
Tacoma, WA 98424

Dear Mr. Speer :

Thank you for your letter of September 23, 2005, requesting the Federal Highway Administration (FHWA) acceptance of a design modification that would combine two currently accepted systems as a crashworthy traffic control device for use in work zones on the National Highway System (NHS). The proposed design modification combines your company’s FG 300 UR post as described in our acceptance letter, WZ-193, dated November 2, 2004, to be mounted to the longitudinal channelizer Qwik Kurb system as previously accepted by our letter, WZ-109, dated April 9, 2002.

The proposed design modification involves coring an existing Qwik Kurb installation and attaching your FG 300 UR posts as shown on the enclosed drawing. You also submitted informal crash testing videos for our review in support of your request that we find the modified device acceptable for use on the NHS under the provisions of the National Cooperative Highway Research Program (NCHRP) Report 350 "Recommended Procedures for the Safety Performance Evaluation of Highway Features."

Based on our review we agree that the combination of the two previously accepted devices will not adversely affect crashworthiness and is acceptable for use on the NHS under the range of conditions tested when proposed by a State.

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

Sincerely yours,

/original signed by /

John R. Baxter, P.E.
Director, Office of Safety Design
Office of Safety


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