1200 New Jersey Ave., SE

Washington, D.C. 20590 

February 9, 2018 In Reply Refer To: 

HSST-1 / WZ-357 

Troy Tapley 

MDI Worldwide 

38271 W. Twelve Mile Road 

Farmington Hills, MI 48331 

Dear Mr. Tapley: 

This letter is in response to your October 18, 2017 request for the Federal Highway 

Administration (FHW A) to review a roadside safety device, hardware, or system for eligibility 

for reimbursement under the Federal-aid highway program. This FHWA letter of eligibility is 

assigned FHW A control number WZ-357 and is valid until a subsequent letter is issued by 

FHW A that expressly references this device. 

Decision 

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

integral part of this letter: 

• 4860M-LT 

Scope of this Letter 

To be found eligible for Federal-a\d funding, new roadside safety devices should meet the crash 

test and evaluation criteria contained in the American Association of State Highway and 

Transportation Officials' (AASHTO) Manual for Assessing Safety Hardware (MASH). 

However, the FHW A, the Department of Transportation, and the United States Government do 

not regulate the manufacture of roadside safety devices. Eligibility for reimbursement under the 

Federal-aid highway program does not establish approval, certification or endorsement of the 

device for any particular purpose or use. 

This letter is not a determination by the FHW A, the Department of Transportation, or the United 

States Government that a vehicle crash involving the device will result in any particular 

outcome, nor is it a guarantee of the in-service performance of this device. Proper 

manufacturing, installation, and maintenance are required in order for this device to function as 

tested. 

This finding of eligibility is limited to the crash worthiness of the system and does not cover other 

structural features, nor conformity with the Manual on Uniform Traffic Control Devices. 
2 

Eligibility for Reimbursement 

Based solely on a review of crash test results and certifications submitted by the manufacturer, 

and the crash test laboratory, FHWA agrees that the device described herein meets the crash test 

and evaluation criteria of the American Association of State Highway and Transportation 

Officials' Manual for Assessing Safety Hardware (MASH). Therefore, the device is eligible for 

reimbursement under the Federal-aid highway program if installed under the range oftested 

conditions. 

Name of system: 4860M-LT 

Type of system: Work Zone Traffic Control Devices 

Test Level: MASH Test Level 3 

Testing conducted by: KARCO 

Date ofrequest: October 18, 2017 

Date of completed package: November 6, 2017 

FHWA concurs with recommendation of the accredited crash testing laboratory as stated within 

the attached form on determination of eligibility for the sign substrate that was physically tested 

(48" x 48" [1219 mm x 1219 mm] diamond shape or up to 16 sq. ft. [1.5 sq. m] vinyl roll up 

signs). This determination of eligibility does not apply to other sign substrates not physically 

tested, but recommended by the laboratory. If an eligibility letter is requested on these other sign 

substrates, this will require successful physical crash testing as per 2016 AASHTO MASH. 

Full Description of the Eligible Device 

The device and supporting documentation, including reports of the crash tests or other testing 

done, videos of any crash testing, and/or drawings of the device, are described in the attached 

form. 

Notice 

This eligibility letter is issued for the subject device as tested. Modifications made to the device 

are not covered by this letter and will need to be tested in accordance with all recommended tests 

in AASHTO's MASH as part of a new and separate submittal. 

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

maintenance 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 test 

and evaluation criteria of AASHTO's MASH. 

Issuance of this letter does not convey property rights of any sort or any exclusive privilege. This 

letter is based on the premise that information and reports submitted by you are accurate and 

correct. We reserve the right to modify or revoke this letter if: (1) there are any inaccuracies in 

the information submitted in support of your request for this letter, (2) the qualification testing 
3 

was flawed, (3) in-service performance or other information reveals safety problems, (4) the 

system is significantly different from the version that was crash tested, or (5) any other 

information indicates that the letter was issued in error or otherwise does not reflect full and 

complete information about the crash worthiness of the system. 

Standard Provisions 

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

control number WZ-357 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 upon request. 

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

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

• If the subject device is a patented product it may be considered to be proprietary. If 

proprietary systems are specified by a highway agency for use on Federal-aid projects: 

(a) they must be supplied through competitive bidding with equally suitable unpatented 

items; (b) the highway agency must certify that they are essential for synchronization 

with the existing highway facilities or that no equally suitable alternative exists; or ( c) 

they must be used for research or for a distinctive type of construction on relatively short 

sections of road for experimental purposes. Our regulations concerning proprietary 

products are contained in Title 23, Code of Federal Regulations, Section 635.411. 

Sincerely, 

Michael S. Griffith 

Director, Office of Safety Technologies 

Office of Safety 

Enclosures 
Version 10.0 {05/16) 

Page 1 of 4 

Request for Federal Aid Reimbursement Eligibility 

of Highway Safety Hardware 

... 

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Date of Request: October 13, 2017 r- New r Resubmission I 

Name: Troy Tapley 

Company: MDI Worldwide 

Address: 38271 W. Twelve Mile Road, Farmington Hills, Ml 48331 

Country: United States 

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 Lev~I Fl 

System Type Submission Type Device Name / Variant Testing Criterion Test 

Level 

'WZ': Crash Worthy Work 

Zone Traffic Control Devices 

(e Physical Crash Testing 

(' Engineering Analysis 

4860M-LT 

AASHTO MASH TL3 

By submitting this request for review and evaluation by the Federal Highway Admin istration, I certify 

that the product(s) was (were) tested in conformity w ith the AASHTO Manual for Assessing Safety 

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

Individual or Organization responsible for the product: 

Contact Name: Troy Tapley Same as Submitter r8J 

Company Name: MDI Worldwide Same as Submitter r8J 

Address: 38271 W. Twelve Mile Road, Farmington Hills, Ml 48331 Same as Submitter r8J 

Country: United States Same as Submitter r8J 

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

Eligibility Process for Safety Hardware Devices' document. 

Marketing Displays, Inc., doing business as MDI Worldwide ("MDI"), whose principal place of business is 38271 

WestTwelve Mile Road, Farmington Hills, Michigan 48331 -3041 , and Karco Engineering, LLC., whose principal 

place of business is 9270 Holly Road, Adelanto, CA 92301 share no ($0.00) financial interests between the two 

organizations. This includes no ($0.00) financial interest but not limited to: 

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

values are not needed); 

ii. Consulting relationships; 

iii. Research funding or other forms of research support; 

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

v. Licenses or contractual relationships; or 

vi. Business ownership and investment interest. 
Version 10.0 {05/16) 

Page 2 of 4 

PRODUCT DESCRIPTION 

(e New Hardware or 

• Significant Modification 

(" Modification to 

Existing Hardware 

Product Description of 4860M-L T 

(Reference drawing ZA-07734-01) 

The 4860M-L T temporary sign support is a work-zone traffic control device used in displaying light weight sign 

substrates; primarily48" x48" [1219 mm x 1219 mm] diamond shape or up to 16 sq. ft. [1.5 sq. ml vinyl roll up 

signs. 

Further description: 

The 4860M-L T temporary sign support is a portable/fold-up sign stand manufactured with two vertically 

mounted wind deflecting steel coil springs. The sign stand consists of a .188" [5 mm] thick steel base, four 

aluminum legs, two aluminum telescoping uprights and two vertically mounted steel springs attaching the 

base to the uprights. The legs are constructed of square aluminum tubing 1.25" x 1.25" x .1 0" [32 mm x 32 mm 

x 2.5 mm]. The two piece telescoping uprights are constructed of 1.25" x 1.25" x .1 0" (32 mm x 32 mm x 2.5 

mm] and 1.00" x 1.00" x .1 0" (25 mm x 25 mm x 2.5mm], respectively. A roll up sign is attached to the 

telescoping mast with the use of an adjustable roll up sign bracket. The sign can be raised and lowered to the 

desired height. The bottom upright has a scored "breakaway section" at approximately 18" (457 mm] above 

grade when stand is fully deployed. 

The overall height of the stand is 138" (3505 mm]. The bottom of the sign is mounted 84" (2134 mm] above 

grade. The total weight of the stand is approximately 37.5 lbs (17.0 kg], which includes the stand of 30.0 lbs 

(13.6 kg] and the sign (including sign bracket) of 7.50 lbs [3.4 kg]. Sand bags can be placed on the legs as 

needed for ballast. 

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 : Alex Beltran 

Digitally signed by Alex Beltran 

DN: cn::Alex Beltran, o::::KARCO Engineering, ou::Testing Laboratory,

email=abeltran@karco.com, c:::U S 

Date: 2017.10.16 12:37:57.07'00' 

Engineer Signature: Alex Beltran 

Address : 9270 Holly Road Adelanto, CA. 92301 Same as Submitter D 

Country: United States Same as Submitter D 

A brief description of each crash test and its result: 

Required Test 

Number 

Narrative 

Description 

Evaluation 

Results 

3-70 (1100() 

Designed to evaluate the ability of a small 

vehicle to activate any breakaway, fracture, 

or yielding mechanism. Is considered 

optional for work-zone traffic control 

devices weighing less than 220 lb (100 kg). 

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

Page 3 of 4 

Required Test 

Number 

Narrative 

Description 

Evaluation 

Results 

3-7 1 (1100() 

A 2,435.0 lb (1,104.5 kg) small car 

approached the test article at an impact 

speed of 61 .79 mph (99.44 km/ h) with a 

critical impact angle between 0° and 90°. 

For this test, two 4860M-L T sign stands were 

impacted. The first article was aligned at 

90° and the second was aligned to 0° to the 

test vehicle's direction of travel. 

Upon impact the 4860M-L T vertical mast 

yielded and fractures from the spring base 

assemble in a predictable manner in both 

the 90° and 0° positions. 

The mast and roll up sign rotated over the 

top of the vehicle and did not contact the 

windshield or roof. The test vehicles 

occupant compartment was not penetrated 

by the test articles. Debris from the test 

articles did not cause a hazard to the 

driver's vision. The vehicle remained 

upright and did not exceed 75° roll angle 

throughout the test. The vehicle did not 

leave its lane and its trajectory was stable 

after both sign stands were impacted. 

PASS 

3-72 (2270P) 

A 5,008.8 lb (2,272.0 kg) pickup truck 

approached the test article at an impact 

speed of 62.97 mph (101.34 km/ h) with a 

critical impact angle between 0° and 90°. 

For this test, two 4860M-L T sign stands were 

impacted. The first article was aligned at 

90° and the second was aligned to 0° to the 

test vehicle's direction of travel. 

Upon impact the 4860M-L T vertical mast 

yielded and fractures from the spring base 

assemble in a predictable manner in both 

the 90° and 0° positions. 

The mast and roll up sign from the first 

article rotated over the top of the vehicle 

and did not contact the windshield or roof. 

The mast and roll up sign from the second 

article contacted the windshield and the 

sign grazed the roof before clearing the 

occupant compartment. The test vehicles 

occupant compartment deformation limits 

were not exceeded. Debris from the test 

articles did not cause a hazard to the 

driver's vision. The vehicle remained 

upright and did not exceed 75° roll angle 

throughout the test. The vehicle did not 

leave its lane and its trajectory was stable 

after both sign stands were impacted. 

PASS 
Version 10.0 {05/16) 

Page 4 of 4 

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: KARCO Engineering, INC 

Laboratory Signature: 

Digitally signed by Alex Beltran 

ON: cn=Alex Beltran, o=KARCO Engineering, ou =Testing Laboratory,

Alex Beltran email =abeltran@karco.com, c=US 

Date: 2017.10.1 612:44:01 •07'00' 

Address: 9270 Holly Rd. Adelanto, CA. 92301 Same as Submitter D 

Country: United States Same as Submitter D 

Accreditation Certificate 

Number and Dates of current 

Accreditation period : 

TL-371; December 18, 2015 through December 18, 2017 .. 

  Digitally signed by Troy Taple

Submitter Signature*:  Date: 2017.10.1315:08:27

 Q4'00'

Submit Form 

ATTACHMENTS 

Attach to this form: 

I) 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 
0.000 s 0.080 s 0.200 s 0.000 s 0.123 s 0.273 s 

D 321.6 ft. (98.0m) ______________________

1 

Occupant Risk* 

Longitudinal OIV ... .. .......... N/A 

Lateral OIV .. .. .. .. .... ...... .. .. . N/A 

Longitudinal RA.. .... .. .. .... .. N/A 

Lateral RA .............. N/A 

THIV............. ... ... ... .... ..... N/A 

PHO ...... ........ ....... ........ N/A 

ASI. .... .. .................... ..... N/A 

Test Article Deflections 

Maximum Debris Field. .. 67.9 ft. (20.7 m) downstream 

7.9 ft (2.4 m) left 

Vehicle Damage 

Vehicle Damage Scale ....... N/A 

CDC......... NIA 

Maximum Intrusion... No measureable deformation 

*Not Applicable, device weighs less than 220 lb (1 00 kg) 

General Information 

Test Agency ................ ... . KARCO Engineering, LLC. 

KARCO Test No..... .. .. . ..... P37305-01 

Test Designation ... ...... ....... 3-71 

Test Date .. . .. .. .... .. ........... 08/17/17 

Test Article 

Name/ Model. . . . . . . . . . . ... .. 4860M-L T Temporary Sign Support 

Type ......... ... ..... .. .... ... .... Work-Zone Traffic Control Device 

Installation Length .... .. .. ..... . Signs 60 ft. (1 8.2 m) apart 

Overall Height............. ... .. 152.0 in. (3.9 m) 

Road Surface ....... ............. Concrete 

Test Vehicle 

Type / Designation ............ 11 00C 

Year, Make, and Model ....... 2014 Kia Rio 

Curb Mass .... .. ...... .. ........ 2,435.0 lbs (1,104.5 kg) 

Test Inertial Mass ............. 2,435.0 lbs (1,104.5 kg) 

Gross Static Mass ...... .. .... .. 2,629.0 lbs (1,192.5 kg) 

Figure 2 Summary of Test 3-71 

1631ti'SOmJ 

Impact Conditions 

Impact Angle WZ1 ........ .... 90° 

Impact Angle WZ2...... o• 

Impact Velocity (90°)..... 61 .79 mph (99.44 km/h) 

Impact Velocity (0°)....... 59.79 mph (96.22 km/h) 

WZ1 Impact Location .. .. Offset 16.9 in. (429mm) Left 

WZ2 Impact Location ... . Offset 16.9 in. (429mm) Right 

Kinectic Energy (90°)... .. 310.8 kip-ft (421.4 kJ) 

Kinetic Energy (0°) . .. .. .. ... 291 .0 kip-ft (394.5 kJ ) 

Exit Conditions 

Exit Velocity (90°) ......... .. .... 60.74 mph (97.75 km/h) 

Exit Velocity (0°) .... .. ... .. .... . 58.76mph (94.57 km/h) 

Exit Angle (90°) .......... ....... o· Exit Angle (0°).................. o· Final Vehicle Position .... .. ... 321 .6 ft. (98.0 m) downstream 

16.3 ft. (5.0 m) Right 

MASH Test 3-71 Summary 

90° Orientation 0° Orientation 

13 TR-P37305-01-A 
MASH Test 3-72 Summary 

90° Orientation 0° Orientation 

0.000 s 0.100 0.300 s 0.000 s 0.127 s 0.327 s 

,--------------------------------,300,8 f1; . ('.l),7M1------------

 

X r  l) ,J ft\ (3.4M) X 

General Information Impact Conditions 

Test Agency .............. .. ..... . KARCO Engineering, LLC. Impact Angle WZ1 ...... .... .. 90° 

KARCO Test No ................ P37305-02 Impact Angle WZ2 ...... 0° 

Test Designation ......... .. .... 3-72 Impact Velocity (90°) ... ... ..... 62.97 mph (101 .34 km/h) 

Test Date... .. ........ .. 08/1 7/17 Impact Velocity (0°) ... ...... ... . 60.73 mph (97.74 km/h) 

WZ1 Impact Location .... 19.7 in. (500 mm) offset 

Test Article WZ2 Impact Location.. . 19.7 in. (500 mm) offset 

Name / Model. .. .. .. . . . . . . . .. 4860M-L T Temporary Sign Support Kinectic Energy (90°) .. 900.2 kJ (663.9 kip-ft) 

Type.. .... .... .. ... .............. Work-Zone Traffic Control Device Kinetic Energy (0°)... ... ..... 837.3 kJ (617.5 kip-ft) 

Installation Length ........ ..... Signs 60 ft. (18.2 m) apart 

Sign Height......... 152 0 in. (3.9 m) Exit Conditions 

Road Surface ... .... ............ Concrete Exit Velocity (90°) .. ...... ... .. 61 .83 mph (99.51 km/h) 

Exit Velocity (0°) ...... ...... .. .. . 59.44 mph (95.66 km/h) 

Test Vehicle Exit Angle (90°) .. .... ......... ... o· Type / Designation .. .......... 2270P Exit Angle (0°) ......... .. ....... 0° 

Year, Make, and Model. ....... 2012 RAM 1500 Final Vehicle Position ... ...... 300.8 ft. (91 .7 m) downstream 

Curb Mass ....... ...... .. .. .... .. . 5,014.3 lbs (2,274.5 kg) 11 .1 ft. (3.4 m) Right 

Test Inertial Mass .. ........... .. 5,008.8 lbs (2,272.0 kg) 

Gross Static Mass ...... ........ 5,008.8 lbs (2,272.0 kg) 

Figure 2 Summary of Test 3-72 

--- ------------------, 

,- llJ 

Occupant Risk* 

Longitudinal OIV ... .. ... ... ... N/A 

Lateral OIV.. .... N/A 

Longitudinal RA .... .... ..... .... N/A 

Lateral RA..... .. ........ ......... N/A 

THIV. ............ .... ......... ... .. N/A 

PHO ............... . ......... . N/A 

ASI. .. . .... .... .... .. N/A 

Test Article Deflections 

Maximum Debris Field .... ... 37.2 ft. (11 .3 m) downstream 

6. 7 ft. (2.1 m) Left 

Vehicle Damage 

Vehicle Damage Scale.... . .. NIA 

CDC ......... .... N/A 

Maximum Intrusion.. No measurable deformation 

*Not Applicable, device weighs less than 220 lb (100 kg) 

13 TR-P37305-02-A 
N 

>I 

0 

---l 

---l 

~ 

0 

~ 

~ 

48" X 48" VINYL 

ROLL UP SIGN 

FIBERGLASS 

CROSS BRACE 

BREAKAWAY 

~ 8"SQ. 

MODEL: 4860M-LT 

TEMPORARY SIGN SUPPORT 

AASHTO MASH (TL-3) 

FLAG BRACKET 

ROLL-UP 1.00" - SQ. ALUMINUM 

TELE. UPRIGHT BRACKET 

152" 

138" 

1.25" - SQ. ALUMINUM 

UPRIGHT 

84" 

..-1 

0 I 

"" ~ 

r--­

r---

0 I 

~ 

1.25" - SQ. 

ALUMINUM (2) CARBON STEEL 

COIL SPRINGS LEG~ 

=--

-1 

RUBBER 

LEG CAPS 

, .. 58" 

CARBON STEEL BASE 

NOTES: 

-DIMENSIONS SHOWN ARE PER THE DESIGN INTENT 

AND ARE SHOWN FOR REFERENCE ONLY. 

4860M-LT SIGN STAND

:~~}?~~._ .-:rrt9 MOie OVERALL WEIGHT: APPROX. 30.0 lbs. (NO SIGN) 

•:)::} WORLDWI D E OVERALL DIMENSIONS: APPROX. 58" X 83" X 138" .,...;.. 

MDI Traffi c Control Products, 3827 1 West 12 Mile Road, Farmington Hills, Ml 4833 1-304 1 800-52 1-6776 ZA-07734-0}