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                Safety Eligibility Letter WZ-98
  
  **Hardware Type:**
            Work Zone Devices
                          **Code:**
            WZ-98
                          **Date:**
            11/16/2001
                          **Testing Criteria:**
            NCHRP 350
                          **Manufacturer:**
            Kong Young Lamps
                          **Device Description:**
            Auto LED Warning Light for Barricade Use
                          **View PDF:**
            wz98.pdf (946.95 KB)
    
    Safety Eligibility Letter

            
            			
            DOT logoU.S. Departmentof Transportation**Federal Highway Administration**
                   	400 Seventh St., S.W.Washington, D.C.  20590

       	    Refer To: HSA-10/WZ-98Mr. Moon K. Hong
Managing Director
Kong Young Lamps & Safety Company, Ltd.
C-3504 Dong II Technotown
889-1 Kwan Yang Dong
Dong An Ku, An Yang Si, Kyung Gi Do
431-060 Korea
            Dear Mr. Hong:
            Thank you for your letter of  August 17 requesting Federal Highway Administration (FHWA) acceptance of your  company’s Auto L.E.D. Warning Beacon for Barricade Use as a crashworthy traffic  control device for use in work zones on  the National Highway System (NHS).  Accompanying your letter was a report of  crash testing conducted by E-Tech Testing Services and a video of the tests. You requested that we find this device  acceptable for use on the NHS under the provisions of National Cooperative  Highway Research Program (NCHRP) Report 350 “Recommended Procedures for the  Safety Performance Evaluation of Highway Features.”
            **Introduction**
              The FHWA guidance on crash  testing of work zone traffic control devices is contained in two  memoranda. The first, dated July 25,  1997, titled “INFORMATION: Identifying Acceptable Highway Safety  Features,” established four categories of work zone devices: Category I devices  were those lightweight devices which could be self-certified by the vendor,  Category II devices were other lightweight devices which needed individual crash testing, Category III  devices were barriers and other fixed or massive devices also needing crash  testing, and Category IV devices were trailer mounted lighted signs, arrow  panels, etc. The second guidance  memorandum was issued on August 28, 1998, and is titled “INFORMATION:  Crash Tested Work Zone Traffic Control Devices.” This later memorandum lists devices that are  acceptable under Categories I, II, and III.
            A brief description of the  device follows:
            The Auto L.E.D. is a 360 degree  warning light beacon powered by two 1.5-volt D-cell (3V total) batteries. It weighs approximately 1 kg complete with  batteries. Product specifications are  enclosed for reference. For purposes of  testing the Auto L.E.D. was mounted to the Bent Type II Plywood Panel Barricade  also illustrated in the enclosures. The  “worst case” 914 mm wide barricade test article assembly was specified for  testing. This barricade had previously  been successfully tested to NCHRP  Report 350 and found acceptable by the FHWA (Acceptance Letter WZ-6 dated November 23,  1998). The design of this barricade was  also released as a generic design by FHWA in our Acceptance Letter WZ-54 on  September 15, 2000. The test article mass,  including the warning light, is 11.8 kg.
          **Testing**
                Full-scale automobile testing was  conducted on your company’s devices. Two  stand-alone examples of the device were tested in tandem, one head-on and the  next placed six meters downstream turned at 90 degrees, as called for in our  guidance memoranda. The complete device  as tested is shown in Enclosure 1. The  crash test is summarized in the table below:
Test Number
                  36-0620-1Test Article
                  Auto LED Warning Beacon on Bent    Type II Plywood Panel BarricadeHeight to Top of Top Panel
                  930 mmHeight to Top of Leg
                  1035 mmHeight to Top of Light
                  1150 mmFlags or lights
                  One light on each barricadeTest Article Mass (each)
                  11.8 kg (no ballast used)Vehicle Inertial Mass
                  813 kgImpact Speed, Head-on
                  102.5 kmhImpact Speed, 90 degree
                  100.4 kmhVelocity Change, Head-on
                  0.58 m/sVelocity Change, 90 degree
                  0.58 m/sVehicle crush
                  Slight damage to bumper, hood,    and grill.Occupant Compart. Intrusion
                  None. No windshield contact by    barricade or lightWindshield Damage
                  None. No contact**Findings**
          In the head-on impact the light  remained intact and connected to the barricade.  In the 90 degree impact the light was hit by the first barricade and  came apart. No part of the light or  batteries impacted the windshield.  Damage was limited to dents in the bumper, hood, and grille. No part of either barricade or light impacted  the windshield.
              The results of the testing met  the FHWA requirements and, therefore, the devices described above and shown in  the enclosed drawings for reference are acceptable for use on the NHS under the  range of conditions tested, when proposed by a state. All warning lights, including the Auto L.E.D.  Warning Beacon for Barricade Use, must be securely attached to the barricade  with standard fasteners including the vandal-resistant cupped washer or  equivalent.
              
            Please note the following  standard provisions which apply to FHWA letters of acceptance:
            Our  acceptance is limited to the crashworthiness characteristics of the devices and  does not cover their structural features, nor conformity with the Manual on  Uniform Traffic Control Devices.
            	Any  changes that may adversely influence the crashworthiness of the device will  require a new acceptance letter.
                Should  the FHWA discover that the qualification testing was flawed, that in-service  performance reveals unacceptable safety problems, or that the device being  marketed is significantly different from the version that was crash tested, it  reserves the right to modify or revoke its acceptance.
                You  will be expected to supply potential users with sufficient information on  design and installation requirements to ensure proper performance.
                You  will be expected to certify to potential users  that the hardware furnished has essentially the same chemistry, mechanical  properties, and geometry as that submitted for acceptance, and that they will  meet the crashworthiness requirements of FHWA and NCHRP Report 350.
                To  prevent misunderstanding by others, this letter of acceptance, designated as  number WZ-98 shall not be reproduced except in full. This letter, and the test documentation upon  which this letter is based, is public information. All such letters and documentation may be  reviewed at our office upon request.
                If  the Auto L.E.D. warning light is patented it would be considered  "proprietary." The use of  proprietary work zone traffic control devices in Federal-aid projects is  generally of a temporary nature. They  are selected by the contractor for use as needed and removed upon completion of  the project. Under such conditions they  can be presumed to meet requirement "a" given below for the use of  proprietary products on Federal-aid projects.  On the other hand, if proprietary  devices are specified for use on Federal-aid projects, except exempt,  non-NHS projects, they: (a) must be supplied through competitive bidding with  equally suitable unpatented items; (b) the highway agency must certify that  they are essential for synchronization with 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, a copy of which is enclosed.Sincerely yours,
                   	  
                   	  Frederick G. Wright, Jr.Program Manager, SafetyEnclosure   
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