October 3, 2022 

1200 New Jersey Ave., SE 

Washington, D.C. 20590

In Reply Refer To: 

HSST-1/WZ-452 

Ben Cohen 

Bone Safety

6450 Industrial Way

Alpharetta, GA 30004 USA 

Dear Mr. Cohen: 

We received your correspondence of March 22, 2021 requesting issuance of a reimbursement 

eligibility letter under the Federal-aid highway program for the roadside safety system, device, 

design, product, or hardware (collectively “device”) described below. This letter is assigned 

Federal Highway Administration (FHWA) control number WZ-452. 

ELIGIBILITY LETTERS

The FHWA issues Federal-aid reimbursement eligibility letters for new roadside safety devices 

that are crash tested in accordance with the industry standard of the American Association of 

State Highway and Transportation Officials (AASHTO) Manual for Assessing Safety Hardware 

(MASH).

FHWA, the Department of Transportation, and the United States (government) do not regulate 

roadside safety devices, crash test facilities, or the manufacturing industry. Issuance of 

eligibility letters is discretionary and provided only as a service to the states. FHWA may, at its 

discretion, decline to issue, revise, or rescind an eligibility letter. Eligibility letters are only 

issued by the FHWA headquarters Office of Safety. 

Eligibility letters are issued only as notice to the states that a device is eligible for reimbursement 

under the Federal-aid highway program. They do not establish approval or certification for any 

other purpose. Issuance of an eligibility letter is not a prerequisite or requirement for state 

transportation agencies seeking to use Federal-aid funds for roadside safety devices. State 

agencies may use a device for which an eligibility letter has not been issued and seek Federal-aid 

reimbursement.

FEDERAL-AID REIMBURSEMENT

The request for issuance of this letter certified the device was crash tested in accordance with the 

industry standard of AASHTO’s MASH. This eligibility letter is based on that certification and 

the material offered in support of its issuance. The device described below is eligible for 

reimbursement under the Federal-aid highway program. 

1 
Name of system: SZ-412 

Type of system: Work Zone Sign Stand Test Level: Test Level 3 

Testing conducted by: Calspan Corporation 

Date of request: March 22, 2021 

Information about the device, including material such as the eligibility request, crash test reports, 

drawings, or images are included in one or more attachment(s) to this letter. 

Eligibility letter WZ-452 is inapplicable to devices, optional equipment, alternate materials, or 

other features that were not crash tested in accordance with AASHTO’s MASH.

This letter is issued only for the subject device as crash tested under AASHTO’s MASH. Later 

modification(s) of the device are not eligible for Federal-aid reimbursement under this letter. Notice of 

later modification(s) should be given to transportation agencies, facility owners, and operators 

(collectively “agencies”).

Agencies should be provided appropriate information about the device’s design, installation, 

maintenance, materials, and mechanical properties.

Issuance of this letter is discretionary, and it may be revised or rescinded at FHWA’s discretion. 

This letter is not a determination of compliance with the Manual on Uniform Traffic Control 

Devices for Streets and Highways (MUTCD) or ownership of any intellectual property rights. 

This eligibility letter is not a determination by the government that a crash involving the subject 

device will result in any particular outcome. It is limited to only the device’s eligibility for 

Federal-aid reimbursement.

INTELLECTUAL PROPERTY

Issuance of this eligibility letter does not convey property rights of any sort nor any exclusive 

privilege. This letter is not authorization or consent by the government for the use, manufacture, 

or sale of any patented or proprietary system, device, design, product, or hardware for which the 

requester is not the patent owner. Eligibility letters are not an expression of any view, position, 

or determination by the government as to the validity, scope, or ownership of any intellectual 

property rights to a specific device. These letters do not grant, impute, suggest, or otherwise 

establish any ownership, distribution, or licensing rights to the requester. The government 

expresses no opinion about the intellectual property rights relating to any device for which this or 

any other eligibility letter is issued. 

PUBLIC DISCLOSURE

To prevent any misunderstanding, and as discussed above, this eligibility letter is assigned 

FHWA control number WZ-452. It should only be reproduced in full with its attachment(s). 

This letter and the material offered by the requester supporting its issuance is public information. 

All eligibility letters and supporting material are subject to public disclosure under theFreedom

2 
Sincerely,

of Information Act (FOIA). Eligibility letters are available to the public at 

https://safety.fhwa.dot.gov/roadway_dept/countermeasures/reduce_crash_severity/.

If you have any questions please contact Aimee Zhang at Aimee.Zhang@dot.gov. 

Michael S. Griffith

Director, Office of Safety Technologies 

Office of Safety

Enclosures 

3 
Version 10.0 (05/16)

 

Request for Federal Aid Reimbursement Eligibility 

of Highway Safety Hardware

Submitter

Date of Request March 22, 2021 New Resubmission

Name: Ben Cohen

Company: Bone Safety

Address: 6450 Industrial Way, Alpharetta, GA 30004

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.

Device & Testing Criterion – Enter from right to left starting with Test Level

System Type Submission Type Device Name / Variant Testing Criterion

Test 

Level

'WZ': Crash Worthy Work 

Zone Traffic Control Devices

  Physical Crash Testin

  Engineering Analysis SZ-412 AASHTO MASH TL

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 AASHTO Manual for Assessing Safety 

Hardware and that the evaluation results meet the appropriate evaluation criteria in the MASH.

I ndividual or Organization responsible for the product:

Contact Name: Ben Cohen Same as Submitter

Company Name Bone Safety Same As Submitter

Address: 6450 Industrial Way, Alpharetta, GA 30004 Same as Submitter

Country: USA Same as Submitter

Enter below all disclosures of financial interests as required by the FHWA `Federal-Aid Reimbursement

Eligibility Process for Safety Hardware Devices' document.

Bone Safety of Alpharetta, GA and Calspan Corporation share no financial interests between the two 

organizations. This includes no shared financial interest but not limited to:

i. Compensation including wages, salaries, commissions, professional fees, or fees for business referrals.

iii. Research funding or other forms of research support;

iv. Patents, copyrights, licenses, and other intellectual property interests;

vi. Business ownership and investment interests;
Version 10.0 (05/16)

PRODUCT DESCRIPTION

New Hardware or 

Significant Modification

Modification to 

Existing Hardware

The Bone Safety SZ-412 work zone safety sign stand attached a roll-up sign at 48” by 48” in size and a bottom 

height of 12”. It is manufactured from steel component parts which have been powder-coated and clear zincplated to minimize corrosion. The sign stand is designed using basic nut & bolt construction, so that all 

component parts may be readily replaced if worn or damaged.

Legs have both a pull-pin and kick release mechanism for releasing legs. The sign stand measures 6.50” x 

6.50” x 24” when folded for storage and have a total weight of 20 lbs. Please reference Appendix C for the 

corresponding drawing package illustrating the design and component materials, of the test article.

CRASH TESTING

By signature below, the Engineer affiliated with the testing laboratory agrees in support of this submission that 

all of the critical and relevant crash tests for this device listed above were conducted to meet the MASH test 

criteria. The Engineer has determined that no other crash tests are necessary to determine the device meets the 

MASH criteria.

Engineer Name: Mark Parisi

Engineer Signature:

Address: 4455 Genesee Street, Cheektowaga, NY 14225 Same as Submitter

Country: USA Same as Submitter

A brief description of each crash test and its result:

Required Test 

Number

Narrative 

Description

Evaluation 

Results

3-70 (1100C)

Designated to evaluate the ability of a small 

vehicle to activate any breakaway, fracture, 

or yielding mechanism. Is considered 

optional for work zone traffic control 

weighting less than 220 lb (100 kg)

Non-Relevant Test, not conducted
Version 10.0 (05/16)

Page 3 of 5

Required Test 

Number

Narrative 

Description

Evaluation 

Results

3-71 (1100)

For this test, Bone Safety work zone signs 

were impacted. Two different vehicles were 

used for the 3-71.

The first test article was aligned at 0° and 

the second test article was aligned at 90° to 

the impacting vehicle's direction of travel. 

Per MASH, for devices weighing less than 

220 pounds, Test 71 was conducted without 

instrumentation for evaluating occupant 

risk values OIV and RA per MASH test 

description.

The first test article was impacted at 0° at a 

velocity of 63 mph (101.4 km/hr) by a 2014 

Kia Rio 4 door sedan with a test inertia mass 

of 2,458 lbs (1,115 kg). Upon impactthe roll 

up sign released the sign stand and folded 

over the front end of the vehicle. No 

identifiable damage to the vehicle was 

caused. Only surface cracks in the 

windshield were identified, and all 

evaluation criteria were met.

The second test vehicle, a 2016 Nissan Versa 

with a mass of 2385 lb (1081.8 kg), impacted 

the 90° sign stand at a speed of 62 mph (99.8 

km/hr) . All evaluation criteria were met.

Impact points for both tests were within the 

12" tolerance around the 1/4 point of 

vehicles.

Neither test vehicle's occupant 

compartment was penetrated by the test 

articles. There was NO cab/passenger 

compartment deformation in the 0 degree 

test, and .4" (10.2 mm) deformation in the 

foot well from the 90 degree test

Debris from the test articles did not block 

the driver's vision after initial impact. The 

vehicle remained upright and did not have 

any roll and pitch throughout the test. The 

vehicle did not leave its lane and its 

trajectory was stable after both sign stands 

were impacted.

TEST RESULT= PASS
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Page 4 of 5

3-72 (2270P)

For this test, two Bone Safety Signs Stands 

were impacted. The first test article was 

aligned at 0° and the second test article was 

aligned at 90° to the test vehicle's direction 

of travel. This test is intended to evaluate 

the sign 's behavior when impacted.

Per MASH, for devices weighing less than 

220 pounds, Test 72 was conducted without

instrumentation for evaluating occupant 

risk values OIV and RA per MASH test 

description.

The test was conducted using a 

commercially available 2009 Ram 1500 

Pickup Truck with a test inertia mass of 5022

lbs (2,278 kg).

The test vehicle impacted the first sign 

stand (oriented at 0°) at a velocity of 61.8 

mph (99.5 km/hr). Upon impact, the roll up 

sign released from the sign stand and 

folded over the front end of the vehicle. 

The top of the vertical cross frame detached 

and impacted the middle of the windshield 

causing surface cracks. The test vehicle 

continued along its path and impacted the 

second sign stand (oriented at 90°) at a 

velocity of 60.7 mph (97.7 km/ hr). Upon 

impact, the roll up sign released from the 

Latch Bracket and folded over the front end 

of the vehicle. The top of the vertical cross 

frame impacted the bottom of the

windshield. The test vehicle's occupant 

compartment was not penetrated by the test 

articles and there was NO inner cab/ 

passenger compartment deformation.

Impact points for both signs were within 

the 12" tolerance around the 1/4 point of 

vehicle, one toward passenger, the other 

toward driver.

Debris from the test article did not cause a 

hazard to the driver 's vision. The vehicle 

remained upright and did not have any roll 

and pitch throughout the test. The vehicle 

did not leave its lane and its trajectory was 

stable after both sign stands were impacted.

TEST RESULT= PASS
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Submit Form

Full Scale Crash Testing was done in compliance with MASH by the following accredited crash test 

laboratory (cite the laboratory’s accreditation status as noted in the crash test reports.):

Laboratory Name: Calspan Corporation

Laboratory Signature:

Address: 4455 Genesee Street, Cheektowaga, NY 14225 Same as Submitter

Country: USA Same as Submitter

Accreditation Certificate

Number and Dates of current 

Accreditation period :

L20-602

December 31, 2022

Laboratory Name: Calspan Corporation

Attach to this form:

ATTACHMENTS

1) Additional disclosures of related financial interest as indicated above. 

2) A copy of the full test report, video, and a Test Data Summary Sheet for each test conducted in 

support of this request. 

3) 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 relevant to understanding the dimensions and performance of the device should also be submitted 

to facilitate our review.

FHWA Official Business Only: 

Eligibility Letter

Number Date Key Words

Submitter Signature:

Mark J. Parisi