February 8, 2007

Refer to: HSSD/WZ-243

Mr. Greg Hannah
President
Impact Recovery Systems, Inc.
246 W. Josephine Street
P.O. Box 12637
San Antonio, TX 78212

Dear Mr. Hannah :

Thank you for your November 6, 2006, letter requesting the Federal Highway Administration's (FHWA) acceptance of your company's Tuff Curb, a longitudinal channelizing curb, 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 and test report documentation of relevant crash tests conducted by Texas Transportation Institute. You requested that we find this longitudinal channelizing curb 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 request. The original completed form has been modified by the addition of the FHWA acceptance letter number and the date of our review. The form, of which a copy is enclosed for reference, will be posted on our Web site in the near future.

Thank you for working with us as we institute this new review and acceptance process.

Sincerely yours,

/original signed by /

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