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U.S. Department of Transportation

Federal Highway Administration

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

June 12, 2008

In Reply Refer To: HSSD/WZ-244

Mr. Chuck Mettler
Engineering Manager
Plastic Safety Systems, Inc.
2444 Baldwin Road
Cleveland, OH 44104

Dear Mr. Mettler:

This letter is in response to your request for Federal Highway Administration (FHWA) acceptance of modifications to your company’s various Type III barricade devices in one letter. These devices and their modifications had been found acceptable for use on the National Highway System (NHS) under the provisions of National Cooperative Highway Research Program (NCHRP) Report 350 “Recommended Procedures for the Safety Performance Evaluation of Highway Features.”

Plastic Safety Systems Type III (PSS Type III) barricades were found acceptable in the following FHWA acceptance letters:

Letter Date Issued Description
WZ-61 December 13, 2000 8 foot wide PSS Type III Plastic Barricade.
WZ-85 November 15, 2001 Generic Type III Barricade, HDPE rails.
WZ-102 April 12, 2002 8 foot wide PSS Type III Plastic Barricade with lightweight warning light and modified rail spacing.
WZ-152 April 10, 2003 Type III barricade with “ANCHOR” base system.
WZ-166 November 12, 2003
  • 12 foot wide PSS Type III Plastic Barricade, 5 feet high.
  • 6 foot wide PSST Type III Plastic Barricade, 7 feet high.
  • 8 foot wide PSST Type III, Telespar frame, 5 feet high.
WZ-166 Amendment #1
May 17, 2005
8 foot wide PSS Type III Plastic Barricade, 7 feet high.
WZ-173 April 19, 2004 The Wave HDPE molded plastic rails, 8 feet wide.
WZ-196 February 25, 2005 Up to 25 square feet of lightweight signs.
WZ-233 April 13, 2006 Type III Barricades with lightweight warning lights.

Specific modifications include:

This letter consolidates the findings of earlier FHWA acceptance letters affecting PSS Type III barricades. The Type III barricades and modifications in the FHWA acceptance letters listed above are acceptable for use on the NHS under the range of conditions tested with or without one or two lightweight warning lights, when proposed by a State.

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

This acceptance is limited to the crashworthiness characteristics of the device and does not cover their structural features, nor conformity with the Manual on Uniform Traffic Control Devices.

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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