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Safety Eligibility Letter CC-65H

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U.S. Department of Transportation
Federal Highway Administration

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

February 21, 2013

In Reply Refer To: HSST/CC-65H

Mr. Geoff Maus
Director of Engineering
TrafFix Devices, Inc.
160 Ave. La Pata
San Clemente, California  93673

Dear Mr. Maus:

This letter is in response to your request for the Federal Highway Administration (FHWA) to review a roadside safety system for eligibility for reimbursement under the Federal-aid highway program.

Name of system: Scorpion Trailer Attenuator with Arrow/Display Panel
Type of system: Truck Mounted Attenuator (TMA)
Test Level: NCHRP Report 350 Test Level 3
Testing conducted by: KARCO
Date of request: December 6, 2012
Request Initially acknowledged: December 12, 2012
Date of completed package: December 6, 2012

The following device is eligible, with details provided in the form which is attached as an integral part of this letter:

Based on a review of crash test results submitted by the manufacturer certifying the device described herein meets the crash test and evaluation criteria of the National Cooperative Highway Research Program (NCHRP) Report 350, the device is eligible for reimbursement under the Federal-aid highway program. Eligibility for reimbursement under the Federal-aid highway program does not establish approval or endorsement by the FHWA for any particular purpose or use.

The FHWA, the Department of Transportation, and the United States Government do not endorse products or services and the issuance of a reimbursement eligibility letter is not an endorsement of any product or service.

Roadside safety devices should meet the guidelines contained in the NCHRP Report 350 or the American Association of State Highway and Transportation Officials’ Manual for Assessing Safety Hardware (MASH).   

Full-scale crash testing according to NCHRP Report 350 was conducted on the Scorpion TMA and TMA Trailer and documented in these FHWA letters:

Number Date Test Level Description
CC-65 07/14/00 TL-2 Scorpion A 10,000 TMA
TL-3 Scorpion C 10,000 Truck Mounted Attenuator
CC-65A 12/08/00 TL-3 Design change (to steel diaphragms and hinges)
CC-65B 03/16/07 TL-3 Scorpion Trailer Attenuator
CC-65C 03/03/08 TL-3 Scorpion TMA & Trailer – infinite weight truck
CC-65D 03/03/08 TL-2 Scorpion TL-2 Trailer TMA
CC-65E 02/13/09 TL-3 Modified Scorpion – reduced weight
CC-65F 04/20/11 TL-2 TMA on lightweight shadow vehicle
CC-65G 04/20/11 TL-2 Full acceptance of Trailer TMA via crash testing

In order to evaluate the performance of the Scorpion Trailer TMA with the arrow/display panel attached, you conducted a developmental test with a device using production aluminum tube frames, but without the internal aluminum honeycomb filled cartridges. The arrow panel and frame was in place during the test, and the video shows that the arrow panel remained rigidly attached to the trailer frame and showed no potential for impacting the test vehicle or penetrating the occupant compartment.

Therefore, the system described and detailed in the attached form is eligible for reimbursement and may be installed under the range of conditions tested.

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


Sincerely yours,

/* Signature of Michael S. Griffith */
Michael S. Griffith
Director, Office of Safety Technologies
Office of Safety


Page last modified on January 17, 2013.
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