1200 New Jersey Ave., SE

 Washington, D.C. 20590

June 17, 2014

FHWA:HSST:NArtimovich:sf:x61331:6/6/14

File: s://directory folder/HSST/WZ334_PexcoConstructionGradeCurb.docx 

cc: HSST Nick Artimovich 

In Reply Refer To:

HSST/WZ-334

Mr. Craig Schulz

Pexco, LLC Davidson Traffic Control Products 

3110 70th Avenue East

Tacoma, Washington 98424

Dear Mr. Schulz:

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: Construction Grade IG Curb, with FG300 Channelizer Posts

Type of system: Longitudinal Channelizer

Test Level: NCHRP Report 350 Test Level 3

Testing conducted by: Texas Transportation Institute

Date of request: January 23, 2014

Date of completed package: May 23, 2014

Decision

The following device is eligible, with details provided in the form which is attached as an 

integral part of this letter:

• Construction Grade IG Curb, with or without FG300 Channelizer Posts

Based on a review of crash test results 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.

Requirements

To be found eligible for Federal-aid funding, roadside safety devices should meet the crash test 

and evaluation criteria contained in the NCHRP Report 350 or the American Association of State 

Highway and Transportation Officials’ Manual for Assessing Safety Hardware (MASH). 
2

Description

The device and supporting documentation are described in the attached form. The original 

FG300 Curb System was the subject of FHWA Letter WZ-193, dated November 2, 2004. An 

amendment dated December 6, 2005, recognized a redesign of FG300 as a one-piece unit. You 

also substituted a material with higher durability plastic. The current letter, WZ-334, covers the 

one piece IG curb units with the original plastic formulation.

Summary and Standard Provisions

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:

• This finding of eligibility does not cover other structural features of the systems, nor 

conformity with the Manual on Uniform Traffic Control Devices.

• Any changes that may influence system conformance with NCHRP Report 350 criteria 

will require a new reimbursement eligibility letter.

• Should the FHWA discover that the qualification testing was flawed, that in-service 

performance reveals safety problems, or that the system is significantly different from the 

version that was crash tested, we reserve the right to modify or revoke this letter.

• You are expected to supply potential users with sufficient information on design and 

installation requirements to ensure proper performance.

• You are expected to certify to potential users that the hardware furnished has the same 

chemistry, mechanical properties, and geometry as that submitted for review, and that it 

will meet the crash test and evaluation criteria of the NCHRP Report 350.

• To prevent misunderstanding by others, this letter of eligibility is designated as number 

WZ-334 and shall not be reproduced except in full. This letter and the test 

documentation upon which it is based are public information. All such letters and 

documentation may be reviewed at our office upon request. 

• This letter shall not be construed as authorization or consent by the FHWA to use, 

manufacture, or sell any patented system for which the applicant is not the patent holder. 

The FHWA does not become involved in issues concerning patent law. Patent issues, if 

any, are to be resolved by the applicant.

Sincerely yours,

Michael S. Griffith

Director, Office of Safety Technologies

Office of Safety

Enclosures