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FHWA Home / Safety / Roadway Departure / Safety Eligibility Letter

Safety Eligibility Letter WZ - 334

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U.S. Department of Transportation
Federal Highway Administration

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

June 17, 2014

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
Complete 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:

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).

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 FHW A eligibility letters:

 

Sincerely yours,

/* Signature of Michael S. Griffith*/

Michael S. Griffith
Director, Office of Safety Technologies
Office of Safety

Enclosures

Request for Federal Aid Reimbursement Eligibility
Of Highway Safety Hardware

Submitter Date of Request: January 21, 2014 radio button New   open radio buttonResubmission
Name: Craig Schulz Signature: Craig Schulz
Company: Pexco, LLC. – Davidson Traffic Control Products
Address: 3110 70th Ave East, Tacoma, WA 98424
Country: USA
To: Michael S. Griffith, Director
FHWA, Office of Safety Technologies

I request the following devices be considered eligible for reimbursement under the Federal-aid highway program.

System Type Submission Type Device Name/Variant Testing Criterion Test Level
'WZ': Crash Worthy Work Zone Traffic Control Devices Radio Button Physical Crash Testing
Radio Button FEA & V&V Analysis
FG 300 Interstate Grade – Variation to be " Construction Interstate Grade" NCHRP Report 350  

By submitting this request for review and evaluation by the Federal Highway Administration, I certify that the product(s) was (were) tested in conformity with the NCHRP Report 350 (Report 350) and that the evaluation results meet the appropriate evaluation criteria in the Report 350.

Identification of the individual or organization responsible for the product:

Contact Name: Craig Schulz Same as Submitter ☒
Company Name: Pexco, LLC. – Davidson Traffic Control Products Same as Submitter ☒
Address: 3110 70th Ave East, Tacoma, WA 98424 Same as Submitter ☒
Country: USA Same as Submitter ☒

PRODUCT DESCRIPTION

Modification to Existing Hardware null

"Construction Grade" – IG Curb is simply a resin change from the current ASA which will remain in the "Interstate Grade" curb, this offering will remain for long term projects/permanent applications. The reason for the development/reintroduction of ABS in the "Construction Grade" IG curb is due to some of the market place wants a 1 – 2 year product (non warrantied), as the benefits of Longitudinal Channelization are recognized and being deployed on several short term projects (less than 2 years). This offers a highly durable product at a lower price point allowing project budgets to be maximized rather than restricted

The ABS has been tested and proven as it was originally the material in the "Standard Curb" WZ-193 was originated on. The physical properties of the two resin are very similar initially. The ASA has better long term beyond 2 year performance which was originally called for by the market

ABS has been the material of choice in our road bases for years, the 495 Beltway project outside of DC uses our ASS bases and posts.

 

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CRASH TESTING

A brief description of each crash test and its result:

Required Test Number Narrative Description Evaluation Results
Til 2004 Bunzl

This was the originating test that all other longitudinal channelizing devices have been based on. It was a live driver test at Texas Transportation Institute in 2004. It was a four part test:

  1. Traversal of Curb at 20 degrees – 64.8 mph impact speed, drivers path was maintained in a straight-ahead position, slight dimpling of the hood.
  2. Traversal of Curb at 0 degrees – 61.4 mph impact speed, drivers path was maintained in a straight-ahead position. No damage or vaulting.
  3. Lane Change Maneuver – 60.8 mph impact speed, driver influence was only the change of direction to make the lane change. No damage or vaulting.
  4. Traversal of Vat 0 degrees – 63.3 mph impact speed, drivers path was maintained in straight ahead position with minimum effort.

Conclusion:
The results of the tests on the Davidson Traffic Control Products FG300 Curb System showed no tendency for the curb to cause the driver to lose control of the vehicle. In addition, no movement of the curb, which could lead to separation from the road surface, was noted.

PASS

Full Scale Crash Testing was done in compliance with Report 350 by the following accredited crash test laboratory (cite the laboratory's accreditation status as noted in the crash test reports.)

Laboratory Name: Texas Transportation Institute
Laboratory Name: Dean Albertsen Same as Submitter □
Address: 3110 70th Ave East, Tacoma, WA 98424 Same as Submitter □
Country: USA Same as Submitter □

ATTACHMENTS

Attach to this form:
1) A copy of the full test report, video, and a Test Data Summary Sheet for each t est conducted in support of this request.
2) A drawing or drawings of the device(s) that conform to the Task Force-13 Drawing Specifications [Hardware Guide Drawing Standards]. For proprietary products, a single isometric line drawing is usually acceptable to illustrate the product, with detailed specifications, intended use, and contact information provided on the reverse. Additional drawings (not in TF-13 format) showing details that are key to understanding the performance of the device should also be submitted to facilitate our review.

FHWA Official Business Only:

Eligibility Letter AASHTOTF13  
Number Date Designator Key Words
WZ-334 June 10, 2014 N/A Longitudinal Channelizer Curb Unit

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Diagram: FG300 Curb - Interstate Grade Part

Page last modified on October 29, 2015.
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