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

June 21, 2011

In Reply Refer To: HSST/WZ-304

Mr. Greg Hannah, President
Impact Recovery Systems
4955 Stout Drive
San Antonio, TX 78219

Dear Mr. Hannah:

This is in response to your February 7, letter requesting the Federal Highway Administration’s (FHWA) acceptance of your company’s Tuff Curb® XLP traffic channelizer as a crashworthy traffic control device for use in work zones and elsewhere on the National Highway System (NHS). Accompanying your letter was the FHWA Office of Safety Design form indicating successful performance when tested under the American Association of Safety Highway Transportation Officials Manual for Assessing Safety Hardware.

Tuff Curb® XLP is a longitudinal channelizing curb system produced by Impact Recovery Systems, Inc. Tuff Curb® XLP consists of two pieces. One is a single piece curb section measuring 40’L × 8’W × 2’H made of High Density Polyethylene and weighing approximately seven (7) pounds. It is attached to the roadway by way of lag bolts through three (3) anchor holes within the curb. The second piece is a coupler which bridges between curb sections, measuring 10’L × 8’W × 1.75’H also made of High Density Polyethylene and weighing approximately 2 pounds. It is attached to the roadway by way of two anchor holes which are co-aligned with adjoining curb sections and anchors by way of the same lag bolt. The Tuff Curb® XLP was subjected to a total of 8 impact tests as note in the enclosures.

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.