
NHTSA Interpretation File Search
Overview
NHTSA's Chief Counsel interprets the statutes that the agency administers and the standards and regulations that it issues. Members of the public may submit requests for interpretation, and the Chief Counsel will respond with a letter of interpretation. These interpretation letters look at the particular facts presented in the question and explain the agency’s opinion on how the law applies given those facts. These letters of interpretation are guidance documents. They do not have the force and effect of law and are not meant to bind the public in any way. They are intended only to provide information to the public regarding existing requirements under the law or agency policies.
Understanding NHTSA’s Online Interpretation Files
NHTSA makes its letters of interpretation available to the public on this webpage.
An interpretation letter represents the opinion of the Chief Counsel based on the facts of individual cases at the time the letter was written. While these letters may be helpful in determining how the agency might answer a question that another person has if that question is similar to a previously considered question, do not assume that a prior interpretation will necessarily apply to your situation.
- Your facts may be sufficiently different from those presented in prior interpretations, such that the agency's answer to you might be different from the answer in the prior interpretation letter;
- Your situation may be completely new to the agency and not addressed in an existing interpretation letter;
- The agency's safety standards or regulations may have changed since the prior interpretation letter was written so that the agency's prior interpretation no longer applies; or
- Some combination of the above, or other, factors.
Searching NHTSA’s Online Interpretation Files
Before beginning a search, it’s important to understand how this online search works. Below we provide some examples of searches you can run. In some cases, the search results may include words similar to what you searched because it utilizes a fuzzy search algorithm.
Single word search
Example: car
Result: Any document containing that word.
Multiple word search
Example: car seat requirements
Result: Any document containing any of these words.
Connector word search
Example: car AND seat AND requirements
Result: Any document containing all of these words.
Note: Search operators such as AND or OR must be in all capital letters.
Phrase in double quotes
Example: "headlamp function"
Result: Any document with that phrase.
Conjunctive search
Example: functionally AND minima
Result: Any document with both of those words.
Wildcard
Example: headl*
Result: Any document with a word beginning with those letters (e.g., headlamp, headlight, headlamps).
Example: no*compl*
Result: Any document beginning with the letters “no” followed by the letters “compl” (e.g., noncompliance, non-complying).
Not
Example: headlamp NOT crash
Result: Any document containing the word “headlamp” and not the word “crash.”
Complex searches
You can combine search operators to write more targeted searches.
Note: The database does not currently support phrase searches with wildcards (e.g., “make* inoperative”).
Example: Headl* AND (supplement* OR auxiliary OR impair*)
Result: Any document containing words that are variants of “headlamp” (headlamp, headlights, etc.) and also containing a variant of “supplement” (supplement, supplemental, etc.) or “impair” (impair, impairment, etc.) or the word “auxiliary.”
Search Tool
NHTSA's Interpretation Files Search
Interpretations | Date |
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ID: 22512.rbmOpenMr. Todd Mitchell Dear Mr. Mitchell: This letter responds to your request for an interpretation of the labeling requirements of Federal Motor Vehicle Safety Standard (FMVSS) No. 208, Occupant Crash Protection. Specifically, you have asked whether the required labels, illustrated in figures 6a, 6b, 6c and figure 8 (for vehicles with advanced air bags) of the standard, must be framed by a black border. You have also sought clarification of the requirement that these labels be permanently affixed to the vehicle sun visor. S4.5.1(b)(2) of the regulatory text states that, except as provided, each vehicle manufactured on or after February 25, 1997, "shall have a label permanently affixed to either side of the sun visor, at the manufacturer's option, at each front outboard seating position that is equipped with an inflatable restraint. The label shall conform in content to the label shown in either Figure 6a or 6b of this standard, as appropriate, and shall comply with the requirements of S4.5.1(b)(2)(i) through S4.5.1(b)(2)(v)." These labels are referred to as "air bag warning" labels. The figure 6(c) label must be affixed to the sun visor only if the label specified by S4.5.1(b)(2) is not visible when the sun visor is in the stowed position. (See S4.5.1(2)(c).) This label is referred to as the "air bag alert" label. Vehicles certified to the advanced air bag requirements of our May 12, 2000, final rule (65 FR 30680) must have labels that meet the requirements of figure 8. Figures 6(a), 6(b), 6(c), and 8 specify both label content and format. Figures 6(a), 6(b), and 8 each specify that the label has a black outline, consisting of horizontal and vertical lines. Figure 6(c) does not specify that the label have any outline, although the label depicted in the figure is outlined in black. Accordingly, FMVSS No. 208 requires the air bag warning labels be framed by black vertical and horizontal lines, while the air bag alert label need not be so framed. The National Highway Traffic Safety Administration (NHTSA) has never defined "permanently affixed" as part of a regulation, and has specifically refused to set forth parameters that would so define the term in FMVSS No. 208. (1) Rather, we have dealt with questions on whether a label is permanently affixed through legal interpretations like this one. (2) Specifically, NHTSA has said that a label is permanent if it cannot be removed without destroying or defacing it and that the label should remain legible for the expected life of the product under normal conditions. Depending on where the label is affixed, various methods of attachment, such as sewing or heat transfer graphics, may meet these criteria. |
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ID: 22513.ztvOpen Mr. Tobin Tracy Dear Mr. Tobin: This is in reply to your letter of November 16, 2000, to the agency asking for a special exemption under 49 U.S.C. 30114 from 49 U.S.C. 30112(a). You wish "to import clear taillight assemblies deemed for show and competition use as similarly outlined in [Section 30114]." You state that "Our product will be labeled 'OFF ROAD AND COMPETITION USE ONLY.'" We appreciate your writing for an interpretation of this matter, but must inform you that we cannot grant you an exemption of this nature, for the reasons explained below. Section 30112(a) requires that motor vehicle equipment imported into the United States comply, and be certified as complying, with all applicable Federal motor vehicle safety standards. However, as an exception to Section 30112(a), noncomplying products may be imported pursuant to Section 30114 which allows the importation of noncomplying motor vehicles or motor vehicle equipment on such terms as the agency decides are necessary "for research, investigations, demonstrations, training, show or display, or competitive racing events." You wish to import taillamp assemblies with clear lenses for use on motorcycles among other types of vehicles. These assemblies would not comply with the requirements of Federal Motor Vehicle Safety Standard No. 108 that the light from taillamps be red. Although your letter does not address the subject, it is likely that at least some of the motorcycles could be driven on the public roads of the United States. Over the past few years we have received numerous complaints from motor vehicle law enforcement personnel around the country who have cited drivers of vehicles licensed for on-road use whose original taillamps have been replaced with taillamps with clear lenses. We have investigated a number of manufacturers and importers of these taillamps and find that most of them have advertised or labeled the lamps for off-road or competition use purposes. Notwithstanding such labels, this is not the purpose for which many of these lamps are being bought and used. The use of terms such as "off-road," "show use only," and "competition use only" have no exclusionary meaning under Federal law, and do not excuse a person using them from any responsibilities that may apply. Any item of motor vehicle lighting equipment manufactured to replace lighting equipment that is required on a new vehicle by Standard No. 108 must itself comply with Standard No. 108. To date, we know of no motorcycles being manufactured that are equipped with taillamps having clear lenses. I enclose a copy of a related interpretation that we furnished Mitch L. Williams of Hella, Inc., on July 17, 1998. In short, motor vehicle replacement lighting equipment must conform to the same requirements as original equipment, and be certified to those requirements, in order to be imported into the United States for sale in the aftermarket. We will not grant an exception to this requirement. Sincerely, John Womack Enclosure |
2001 |
ID: 2251yOpen Mr. James A. Cowan, Jr. Dear Mr. Cowan: This is in response to your request for an interpretation of Federal Motor Vehicle Safety Standard No. 217: Bus Window Retention and Release. I apologize for the delay in responding to your inquiry. Your letter explained that Crown plans to sell one prototype school bus model which was developed but not produced, and which contains a side emergency exit which is wider than required under Standard No. 217. Because of the wider door, the seatback of the passenger seat located immediately forward of the emergency exit door intrudes into the emergency door exit opening. You have requested an interpretation as to whether this is consistent with Standard No. 217. The answer to your question is no. Standard No. 217 specifically requires that "[a] vertical transverse plane tangent to the rearmost point of a seatback shall pass through the forward edge of a side emergency door." S5.4.2.1(b). This requirement prohibits the forward seat or seatback from extending into the door opening regardless of the size of the door opening. Therefore, as it is now configured, the bus you have described in your letter is not in compliance with Standard No. 217. I hope you have found this information helpful. Please contact David Greenburg of this office at (202) 366-2992 if you have any further questions concerning this issue. Sincerely,
Stephen P. Wood Acting Chief Counsel /ref: VSA d:l/9/90 |
1970 |
ID: 22525.ztvOpenMr. Harold Holeman Dear Mr. Holeman: This is in reply to your email of December 26, 2000, asking for interpretations of Federal Motor Vehicle Safety Standard No. 108, "Lamps, Reflective Devices and Associated Equipment." Your first question is whether "the standards as set forth in FMVSS 108 require that bumper bras or bumper masks have openings around the running lights, parking lights, turning signals, etc.?" Standard No. 108 does not regulate bumper bras or masks per se. However, lighting equipment is required under Federal law to comply with all requirements of Standard No. 108 when accessory equipment such as bumper bras are installed by regulated persons, whether the equipment is installed as original equipment or aftermarket equipment. The one exception under Federal law is a bra or mask installed by the vehicle owner; if this creates a noncompliance with Standard No. 108, the owner is responsible under any applicable local laws rather than Federal law. Your next question is "If the bra material is transparent and does not noticeably diminish the luminescence of the lights is the bra design within code without having cutouts for the lights?" Paragraph S7.8.5 prohibits "any styling ornament or other feature, such as a translucent cover or grille, in front of the lens" when the headlamps are activated. We view a transparent bra as an "other feature" and prohibited by Standard No. 108. Thus, a transparent bra could not be installed by a regulated person (i.e., manufacturer, distributor, dealer, or motor vehicle repair business) without violating Standard No. 108, but could be installed by the vehicle owner, provided that it does not violate local laws. You then ask "Is there a test that should or can be performed to show that the intensity of the running lights is adequate even when covered by the bumper bra?" The photometric tests for each of the lamps covered by Standard No. 108 are essentially those of the Society of Automotive Engineers, which have been incorporated by reference in Standard No. 108. These are laboratory tests rather than tests conducted on the vehicle itself. They could be conducted with the transparent bra or mask material cut to fit the lens. Any diminution in light output must not result in photometric output falling below the minimum levels specified for test points in any individual standard. Like you, we are not aware of any transparent bra or mask on the market. In general, we do not favor covering the lens of any lamp with other material. Dirt and grime may accumulate to the point that candela is reduced below the minimum specified in the standard. Further, it may not be easily removable by washing the cover. Sincerely, John Womack ref:108 |
2001 |
ID: 22526.ztvOpen Mr. Benjamin J. Freeman Dear Mr. Freeman: This is in reply to your email of December 26, 2000, asking about the status of military vehicles for spare parts. You have been offered 30 trucks of model years 1990-96. You state that "as long as I have all engines and transmissions removed and have the remaining vehicles meet all standards for that year the vehicle was manufactured, FMVSS. Or as I thought of mainly offering the spare parts as upgradeable (newer) replacement core components to others like myself with older Land Rovers." We are not quite clear as to whether the military trucks are Land Rovers or other types of vehicles. We are also unsure whether you would be importing these parts. Nevertheless, we can offer some guidance. Vehicles manufactured pursuant to U.S. military contracts are exempt from the U.S. Federal motor vehicle safety standards (FMVSS). Military vehicles that are not manufactured pursuant to U.S. military contracts are not exempt from the FMVSS and, if they are imported, they are subject to the same requirements as apply to the importation of non-military motor vehicles. Motor vehicles that are imported for resale and that were not originally manufactured to comply with the FMVSS (such as a Land Rover manufactured for the British armed forces) can only be imported through an entity that our agency has recognized as a Registered Importer. Items of motor vehicle equipment may be imported provided that those items that are subject to one of the FMVSS comply with the applicable standard and are so certified (e.g., brake hoses must be stamped DOT as certification of compliance with FMVSS No. 106, but brake discs or drums do not have to be certified or to comply with any standard, since no FMVSS applies to them). Used components of military vehicles may be imported and sold as replacement parts for non-military vehicles, subject to the compliance/certification restriction mentioned in the previous paragraph. However, if a vehicle is disassembled, its component parts sent to the United States, and reassembled after importation, or if a vehicle is assembled from imported parts, we consider that the FMVSS that apply to it are those in effect as of the date of its latest assembly regardless of the age of the parts. If you have further questions, you may call Taylor Vinson of this Office (202-366-5263). Sincerely, John Womack |
2001 |
ID: 2252yOpen Mr. Allen R. Andrlik Dear Mr. Andrlik: This responds to your letter asking about Federal regulations that would apply to the "Milford Cargo Barrier" that Milford Industries, an Australian company, manufactures. Your enclosure indicates that the barrier is a type of wire screen that is generally anchored to the sides and floor of a vehicle directly behind the front seat(s). The barrier is intended to protect occupants in a crash from impact with objects carried in the rear of cars, trucks and vans. By way of background information, the National Highway Traffic Safety Administration (NHTSA) is authorized by the National Traffic and Motor Vehicle Safety Act to issue Federal motor vehicle safety standards that set performance requirements for new motor vehicles and items of motor vehicle equipment. NHTSA is not authorized to certify or approve motor vehicles or motor vehicle equipment for compliance with our Federal motor vehicle safety standards. Instead, under the National Traffic and Motor Vehicle Safety Act (copy enclosed), each manufacturer of a motor vehicle or item of motor vehicle equipment is responsible for certifying that its products meet all applicable safety standards. The following represents our opinion based on the information provided in your letter. There is currently no Federal motor vehicle safety standard that is directly applicable to the product you describe. Our standard for glazing materials (Standard No. 205) applies only to interior barriers or partitions that contain glazing, and not to wire screens. However, there are other Federal laws that indirectly affect the manufacture and sale of Milford's barriers. If the barrier were installed as original equipment on a new motor vehicle, the vehicle manufacturer would be required to certify that, with the device installed, the vehicle satisfies the requirements of all applicable safety standards. Installation of the barrier could affect a vehicle's compliance with various safety standards. For example, installation of the barrier could affect compliance with Standard No. 201, Occupant Protection in Interior Impact, which sets energy-absorption requirements for the back of the front seat, to protect occupants in the rear seat who may be thrown forward in a crash. The barrier could also affect compliance with Standard No. 208, Occupant Crash Protection, (safety belts and other restraint systems), and Standard No. 111, Rearview Mirrors (driver field of view). Copies of each of these standards are enclosed. If the barrier were added to a previously certified new motor vehicle (e.g., a completed van) prior to the vehicle's first sale, the person who modifies the vehicle may have certification responsibilities as an "alterer" under 49 CFR /567.7. This would occur if the installation of the barrier constituted something other than a "readily attachable" component (such as tires or rim assemblies). To determine whether installation of the barrier involves a readily attachable component, the agency considers factors such as the intricacy of installation, and the need for special expertise in installing the barrier. The advertising brochure you enclosed states: "Expert installation available Australia wide." It also indicates that the barriers are "designed...to the individual dimensions" of the consumer's motor vehicle and are "load rated" (which we understand to mean that the barrier and its attachment are capable of withstanding a rated load). These factors appear to indicate that a degree of special expertise and analysis are needed to install the barrier so that it will perform in the manner intended. In light of these considerations, the barrier appears to be something other than a readily attachable component under /567.7. (If Milford would like to send us information indicating otherwise, we would be happy to review it.) If the cargo barrier were installed in a new or used vehicle by a commercial business such as a motor vehicle dealer or repair shop, the installer would be subject to Safety Act considerations affecting the installation. Section l08(a)(2)(A) of the Act states: "No manufacturer, distributor, dealer, or motor vehicle repair business shall knowingly render inoperative ... any device or element of design installed on or in a motor vehicle or item of motor vehicle equipment in compliance with an applicable Federal motor vehicle safety standard...." Thus, the commercial installer would have to make sure that the addition of the apparatus would not negatively affect the compliance of any component or design on a vehicle with applicable Federal safety standards (such as Standards 111, 201 and 208). Section 109 of the Act specifies a civil penalty of up to $1,000 for each violation of /108. In addition to the FMVSS considerations, manufacturers of motor vehicle equipment should also be aware that they are subject to the requirements in sections 151-159 of the Safety Act concerning the recall and remedy of products with defects relating to motor vehicle safety. I have enclosed a copy of our regulation for defect responsibility of motor vehicle equipment manufacturers (49 CFR Part 579) for your information. Any manufacturer which fails to provide notification of or remedy for a defect may be subject to a civil penalty of up to $1,000 per violation. In addition to the regulations described above, we also bring to your attention a procedural rule which applies to all manufacturers subject to the regulations of this agency. Subpart D of 49 CFR Part 55l, Procedural Rules, requires all manufacturers headquartered outside of the United States to designate a permanent resident of the United States as the manufacturer's agent for service of all process, notices, orders and decisions. This designation should be mailed to the Chief Counsel, National Highway Traffic Safety Administration, 400 Seventh Street, S.W., Washington, D.C. 20590, and must include the following information: l. A certification that the designation of agent is valid in form and binding on the manufacturer under the laws, corporate-by-laws, or other requirements governing the making of the designation at the time and place where it is made; 2. The full legal name, principal place of business and mailing address of the manufacturer; 3. Marks, trade names, or other designations of origin of any of the manufacturer's products which do not bear its name; 4. A statement that the designation shall remain in effect until withdrawn or replaced by the manufacturer; 5. A declaration of acceptance duly signed by the agent appointed, which may be an individual, a firm or a United States Corporation; and, 6. The full legal name and address of the designated agent. In addition, the designation must be signed by a person with authority to appoint the agent. The signer's name and title should be clearly indicated beneath his or her signature. I hope this information is helpful. Please feel free to contact us if you have further questions. Sincerely,
Stephen P. Wood Acting Chief Counsel Enclosures /ref:VSA#201#567 d:l/9/90 |
1970 |
ID: 22539.ztvOpen Mr. Tomas P. Quintanilla FAX (671) 475-6219 Dear Mr. Quintanilla: This is in reply to your fax of December 18, 2000, to this agency's "Compliance Branch" re the possible forfeiture of a vehicle that does not comply with applicable Federal motor vehicle safety standards (FMVSS). The vehicle in question is a 1998 Volkswagen Golf from Japan whose "front windshield and light assembly did not have the required 'DOT' markings, and therefore not enterable into Guam according to U.S.D.O.T." The owner has not brought the vehicle into compliance and is willing to forfeit the vehicle rather than pay the storage fees that have accumulated in the interim. You have asked two questions with respect to this situation: "1. Can this vehicle be forfeited to a Government of Guam Agency and relinquished to another government agency for government use?" First of all, we want to call to your attention that the attempted importation of this vehicle was contrary to statute. Under 49 U.S.C. 30141(a), before a nonconforming vehicle can be admitted for purposes of conformance, the National Highway Traffic Safety Administration must have determined that the vehicle is capable of conversion to meet the FMVSS (See list at Appendix A, 49 CFR Part 593). We have made no such determination with respect to the 1998 Volkswagen Golf. Further, under 49 U.S.C. 30141(d)(1), an importer of a nonconforming vehicle is required to provide a bond to ensure that the vehicle will be brought into conformance. If the vehicle covered by the bond is not brought into compliance, the bond requires the vehicle "to be exported (at no cost to the United States Government) by the Secretary of the Treasury or abandoned to the Government." We interpret this as authorizing forfeiture only to the Federal Government. If the Volkswagen in question is covered by a conformance bond, the terms of the bond require the vehicle to be exported by the Guam Customs & Quarantine Agency, or that it be abandoned to an agency of the United States Government. We prefer that the vehicle be exported to ensure that it will never be sold at auction or otherwise to a private individual for use on the public roads. If the Volkswagen is not covered by a conformance bond, the only proper disposition of it under the laws that we administer is that it be exported to a jurisdiction outside the United States (see 49 U.S.C. 30102(a)(10)). "2. What authority can I cite, if any, which states that a non-conforming vehicle can be utilized as long as it is not driven on public roadways?" There is no authority that you can cite for your proposition. The 1998 Volkswagen Golf is a passenger car manufactured for use on the public roads. The vehicle in question does not comply with applicable FMVSS and cannot be imported for use on or off the public roads. I hope that this answers your questions. Sincerely, John Womack, |
2001 |
ID: 2253yOpen Ms. Linda B. Kent Dear Ms. Kent: Thank you for your letter requesting an interpretation of whether the use of a product on motor vehicles would violate Standard No. 205, Glazing Materials (49 CFR /571.205). This product, called "Contra Vision," is designed to display messages or advertising materials on windows and other clear surfaces, so that viewers on one side of the clear surface will see the message displayed, while viewers on the other side of the surface will see an essentially transparent surface without any message visible. According to your letter, this product "will be used for promotional signage in store windows, but also has application in rear taxicab windows, as well as rear and side windows of city buses." You asked for our opinion of whether this product complies with Standard No. 205. Some background on how Federal motor vehicle safety laws and regulation affect this product may be helpful. Our agency is authorized under the National Traffic and Motor Vehicle Safety Act to issue safety standards applicable to new motor vehicles and new items of motor vehicle equipment. NHTSA, however, does not approve or certify any vehicles or items of equipment, nor do we endorse any commercial products or processes. Instead, the Safety Act specifies that each manufacturer itself must certify that its products meet all applicable safety standards. The agency periodically tests vehicles and items of equipment for compliance with the standards, and also investigates alleged defects related to motor vehicle safety and alleged violations of other statutory provisions. Your letter indicates that you are already aware that NHTSA has issued a safety standard that applies to the windows installed in motor vehicles. Specifically, Standard No. 205 requires that all new vehicles and all new glazing materials for use in motor vehicles must comply with certain performance requirements. Among the requirements set forth in Standard No. 205 are specifications for minimum levels of light transmittance. A minimum of 70 percent light transmittance is required in glazing areas requisite for driving visibility, which includes all windows in passenger cars. In trucks and buses, the windshield and windows to the immediate right and left of the driver and the rearmost window, if the latter is used for driving visibility, are considered to be requisite for driving visibility, and therefore subject to the 70 percent minimum light transmittance requirement. Your letter did not provide any information on the light transmittance that would be measured through glazing with Contra Vision installed on it. The combination of the glazing material and the Contra Vision must allow at least 70 percent light transmittance to comply with the requirements of Standard No. 205. No manufacturer or dealer is permitted to install Contra Vision on the glazing materials on new vehicles, unless the manufacturer or dealer certifies that the vehicle continues to comply with the 70 percent minimum light transmittance and other requirements of Standard No. 205. After a vehicle is first sold to a consumer, modifications to the vehicle are affected by section 108(a)(2)(A) of the Safety Act (15 U.S.C. 1397(a)(2)(A)). That section prohibits any manufacturer, dealer, distributor, or repair business from "rendering inoperative" any device or element of design installed in a vehicle in compliance with any safety standard. This provision of the law means that no manufacturer, dealer, distributor, or repair business could install Contra Vision if the addition of Contra Vision to the glazing would result in a light transmittance of less than 70 percent, or otherwise cause the vehicle to no longer comply with the applicable requirements of Standard 205. Violations of this "render inoperative" prohibition can result in Federal civil penalties to the manufacturer, dealer, distributor, or repair business of up to $1000 for each noncomplying installation. Section 108(a)(2)(A) of the Safety Act does not affect vehicle owners. Hence, vehicle owners themselves may install Contra Vision or any other product on the glazing of their vehicle, regardless of whether the installation causes the vehicle to no longer comply with Standard No. 205. Individual States have the authority to regulate the operational use of vehicles by their owners, and, therefore, have the authority to regulate or preclude individual owner modifications to the glazing of their vehicles. I have enclosed an information sheet that summarizes the relationship between Federal auto safety laws and motor vehicle window tinting. I hope this information is helpful. If you have any further questions or need any additional information about this topic, please feel free to contact Dorothy Nakama of my staff at this address or by telephone at (202) 366-2992. Sincerely,
Stephen P. Wood Acting Chief Counsel Enclosure ref:205#VSA d:l/9/90 |
1970 |
ID: 2254yOpen Mr. Howard Kossover Dear Mr. Kossover: This is in reply to your letter of December 8, l989, to Taylor Vinson of this Office. You have enclosed photographs of a semi-trailer that you are constructing, and wish to know whether the location of the rear turn signal, stop, and taillamps comply with the requirements of Federal Motor Vehicle Safety Standard No. 108, Lamps, Reflective Devices, and Associated Equipment. Table II of Standard No. l08 requires each of these lamps to be "on the rear". In addition, the SAE requirements for each of these lamps that are incorporated by reference into Standard No. l08 require that visibility of each lamp shall not be obstructed by any part of the vehicle throughout the photometric test angles for the lamp, unless the lamp is designed to comply with all photometric and visibility requirements with these obstructions considered. In addition, signals from lamps on both sides of the vehicle shall be visible through a horizontal angle from 45 degrees to the left to 45 degrees to the right. To be considered visible, the lamp must provide an unobstructed projected illuminated area of the outer lens surface, excluding reflex, at least 2 square inches in extent, measured at 45 degrees to the longitudinal axis of the vehicle. The lamps on your semi-trailer are mounted 27 inches from the rear edge of the vehicle. In that position the lamps are not mounted "on the rear". Further, we question whether the 45 degree visibility requirements would be met, especially for the inboard lamps. We do not know whether the extended portion of the vehicle between the lamps is a sufficient obstruction to affect compliance with the photometric requirements. Overall, it does not appear that this design complies with Standard No. l08. Sincerely, Stephen P. Wood Acting Chief Counsel / ref:l08 d:l/9/90 |
1970 |
ID: 22556.ztvOpenMr. Gary L. Johnson, Sr. Dear Mr. Johnson: This is in reply to your letter of October 24, 2000, (apparently mailed later, as we did not receive it until January 8, 2001). You ask for a legal interpretation regarding your "Safety Light Cord," an example of which arrived shortly after your letter. As you describe it, "the light cord attached to a battery activates four-way flashers" on trailers. When installed, "the cord will allow the emergency four-way flashers to blink to improve the visibility of disabled trailers." The cord apparently also can be used to provide power to trailer lighting systems in the event there is a disruption in the electrical connection between tractors and trailers. Under our regulations, the Safety Light Cord is an item of "motor vehicle equipment," but there are no Federal motor vehicle safety standards that apply to it. This means that its manufacture and use are subject to any standards that may apply to it in any state in which it is sold or used, rather than it being subject to any Federal standards. We are puzzled by your remark that the Cord activates "the emergency four-way flashers." On motor vehicles other than trailers and motorcycles, the front and rear turn signal lamps activated simultaneously by a vehicular hazard warning system operating unit comprise the hazard warning system required by Federal Motor Vehicle Safety Standard No. 108, "Lamps, Reflective Devices and Associated Equipment." However, Standard No. 108 does not require trailers to have either front turn signal lamps or a hazard warning system operating unit. We believe you mean to tell us that the Cord activates both rear turn signal lamps simultaneously in a flashing mode. You also mentioned that "all the assembly parts . . . are already D.O.T. approved parts." We do not know what you mean by this statement. The Department of Transportation neither approves nor disapproves parts. Please understand that, even though we have informed you that none of our standards apply to the Safety Light Cord, Trintex may not represent that the Cord is "D.O.T. approved;" you must not use this expression in any manner in connection with this product. If you have any further questions, you may call Taylor Vinson with whom you have talked previously (202-366-5263). We are returning the sample Cord under separate cover. We appreciate your efforts to enhance the conspicuity of disabled trailers. Sincerely, John Womack ref:108 |
2001 |
Request an Interpretation
You may email your request to Interpretations.NHTSA@dot.gov or send your request in hard copy to:
The Chief Counsel
National Highway Traffic Safety Administration, W41-326
U.S. Department of Transportation
1200 New Jersey Avenue SE
Washington, DC 20590
If you want to talk to someone at NHTSA about what a request for interpretation should include, call the Office of the Chief Counsel at 202-366-2992.
Please note that NHTSA’s response will be made available in this online database, and that the incoming interpretation request may also be made publicly available.