
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: 2956oOpen Mr. Michael Pomerantz Dear Mr. Pomerantz: As you requested in a May 27, 1988, telephone conversation with Ms.Fujita of my staff, I am enclosing a copy of our November 27, 1972, letter to Mr.David Humphreys concerning paragraph S4.3 of Standard No. 207, Seating Systems. Please note that a portion of our letter to Mr. Humphreys regarding seat cushion restraints has been superseded, as explained in our September 2, 1976, letter to Mr. Tokio Iinuma. Although you were concerned only with the language of S4.3 excepting seats "having a back that is adjustable only for the comfort of its occupants," I have enclosed a copy of our letter to Mr. Iinuma for your information. I understand that you might be contacting us with further questions on Standard No. 207. We look forward to hearing from you. Sincerely,
Stephen P. Wood Assistant Chief Counsel for Rulemaking Enclosures ref:207 d:6/7/88 |
1988 |
ID: 2965yyOpen Mr. Stanley L. Dembecki Dear Mr. Dembecki: This responds to your letter of March 1, 1991, asking for an "evaluation" of your "Flashing' center stop lamp. You have four prototypes: "complete" one and two bulb units "for l984 and older vehicles", and one and two "electronic modules for all third safety brake light retrofits through 1991." In your opinion, "since the new safety brake light utilizes the existing brake light (retrofit) on a previously approved brake light assembly it is reasoned that any evaluation as to durability testing is not really needed." We understand that your "complete" unit for the older vehicles is a lamp. It is unclear whether the "electronic module" intended for retrofit for newer vehicles is a separate lamp, or a device to be inserted into an existing lamp. However, the issue that your invention presents is not whether further testing of it is required, but whether it is permitted at all under applicable Federal statutes and regulations. We note that you would like to market it both for installation in passenger cars that already have a center lamp, and in those that do not. In short, you intend to sell the lamp/module in the aftermarket for installation on vehicles in use, rather than as original equipment installed by the manufacturer. Center highmounted stop lamps have been required by Federal Motor Vehicle Safety Standard No. l08 on all passenger cars manufactured on or after September 1, l985 (effectively the l986 model year). You indicate that your lamp flashes momentarily when the brake pedal is applied and thereafter the lamp is steady-burning. Standard No. l08 initially allowed the center lamp to be wired so as to flash with the turn signals but, since September 1, l986, has required the center lamp to be steady-burning at all times when in use. Because your invention is not steady-burning at all times, and is activated by the brake pedal and not the turn signal control, the sale or installation of the invention may be prohibited by Federal law. If this invention is a lamp, it is not a center lamp that conforms to either the initial or current requirements of Standard No. l08 for center lamps. If, on the other hand, it is a module intended for insertion into an existing lamp, its sale or installation could violate existing Federal requirements. The National Traffic and Motor Vehicle Safety Act forbids the sale of equipment that does not comply with a Federal motor vehicle safety standard. If your invention is sold as a lamp, and intended to replace original equipment center lamps on l986 and subsequent model year cars, its sale would be in violation of the Act. On the other hand, there is no similar prohibition on sale of componentry such as an electronic module that would create a noncompliance once installed. However, there is a prohibition on the installation of such componentry (as well as installation of the invention in lamp form on l986 and subsequent model year cars). The Act forbids a manufacturer, distributor, dealer, or motor vehicle repair business from rendering inoperative in whole or in part any equipment on a vehicle which has been installed pursuant to a Federal motor vehicle safety standard. We interpret this as forbidding the installation of equipment that would take a vehicle out of compliance with a Federal safety standard. With respect to l985 model and older cars, which Standard No. l08 did not require to be equipped with center lamps, sale of your lamp exclusively for use on these older vehicles would not violate the Act. However, its installation remains subject to the rendering inoperative prohibition discussed above. There are other Federal standards involving equipment to consider. For example, we would be concerned if your lamp interfered with the field of view of the interior rear view mirror, and if its installation would affect the wiring of the other stop lamps so as to interfere with their design performance. However, there should be no problem with the field of view requirements if the lamp size is comparable to the required center lamps. Once you have satisfied these concerns under Federal law, use of the lamp remains subject to the laws of the individual States in which it is used. We are unable to advise you on these laws, and suggest that you consult for an opinion the American Association of Motor Vehicle Administrators, 4600 Wilson Boulevard, Arlington, Va. 22203. Sincerely,
Paul Jackson Rice Chief Counsel ref:l08 d:4/8/9l |
2009 |
ID: 2966yyOpen Mr. Richard F. Land Dear Mr. Land: This responds to your February 12, 1991 letter to Ms. Fujita of my staff concerning the ambulance fleet you recently inspected. Each ambulance had a wooden block mounted under the accelerator pedal to limit the driver's ability to accelerate the vehicle. You state that Tennessee law does not prohibit installation of these "makeshift speed governors." However, you would like to know whether NHTSA's requirements would prohibit installation of the blocks. The answer to your question is no. In a March 26 telephone conversation with Ms. Fujita, you said that the blocks were installed by the ambulance owner. Our standards do not regulate in any manner how a vehicle owner can modify his or her vehicle. If the blocks were installed by a motor vehicle manufacturer, distributor, dealer or repair business, certain requirements of the Vehicle Safety Act (copy enclosed) would apply. Section 108(a)(2)(A) of the Act prohibits any person in the aforementioned categories from knowingly "render[ing] inoperative" any equipment or element of design installed in compliance with an FMVSS. However, there would be no rendering inoperative of compliance with the FMVSS for accelerator control systems (FMVSS 124) in the situation you described, because that FMVSS does not establish requirements for accelerator pedal actuation. Of course, the installation of the block must not have rendered inoperative compliant equipment or designs on the vehicle that were installed pursuant to other safety standards. For example, the block must not interfere with the vehicle's braking ability. I hope this information is helpful. Please contact us if you have further questions. Sincerely,
Paul Jackson Rice Chief Counsel Enclosure ref:VSA#124 d:4/l2/9l |
1970 |
ID: 2967yyOpen Mr. Howard "Mac" Dashney Dear Mr. Dashney: This responds to your letter of February 19, 1991. In your letter you asked several questions regarding the purchase, sale, and use of motor vehicles used to transport students to and from school and related events. Where two or more questions concern a common issue, they are addressed by a single response. Question 1: Do Federal Motor Vehicle Safety Standards (FMVSS) apply to multi-purpose vehicles with seating positions for more than 10 passengers, passenger vans, used to transport students to and from school and related events? Question 5: Are there FMVSS's in effect for occupants of sedans, station wagons, or mini-vans with seating positions for fewer than 10 passengers used to transport students to and from school and related events? The answer to both questions is yes. NHTSA has issued FMVSS covering all of the types of motor vehicles mentioned in your questions. The application section of each FMVSS indicates which types of motor vehicles are required to comply with its provisions. The motor vehicles you refer to in Question 1 are considered "schoolbuses" by this agency. A "school bus" is a motor vehicle designed to carry 11 or more persons, including a driver, and sold for transporting students to and from school and school-related events (49 CFR 571.3). New school buses must comply with the Federal Motor Vehicle Safety Standards (FMVSS) for "buses" and also those for "school buses." The following is a list of the FMVSS that include requirements for school buses: Standards No. 101 through No. 104; Standard No. 105 (school buses with hydraulic service brake systems); Standards No. 106 through No. 108; Standards No. 111 through 113; Standard No. 115; Standard No. 116 (school buses with hydraulic service brake systems); Standard No. 119; Standard No. 120; Standard No. 121 (school buses with air brake systems); Standard No. 124; Standards No. 201 through No. 204 (school buses with a GVWR of 10,000 pounds or less); Standard No. 205; Standards No. 207 through No. 210; Standard No. 212 (school buses with a GVWR of 10,000 pounds or less); Standard No. 217; Standard No. 219 (school buses with a GVWR of 10,000 pounds or less); Standard No. 220; Standard No. 221 (school buses with a GVWR greater than 10,000 pounds); and Standards No. 222, 301, and 302. These standards are part of 49 CFR 571. I have enclosed information on how you can obtain copies of the FMVSS. Regarding the motor vehicles mentioned in Question 5, definitions of other motor vehicle types are also found in 49 CFR 571.3. For instance, "multipurpose passenger vehicle" is defined as "a motor vehicle with motive power, except a trailer, designed to carry 10 persons or less which is constructed either on a truck chassis or with special features for occasional off-road operation" (49 CFR 571.3(b)). "Passenger car" is defined as " a motor vehicle with motive power, except a multipurpose passenger vehicle, motorcycle, or trailer, designed for carrying 10 persons or less" (49 CFR 571.3(b)). Question 2: Is it legal for automobile manufacturers or dealers to lease or sell passenger vans to school districts or private fleet operators when the purpose of those vehicles is to transport students to and from school and related events? Question 6: Is it legal for automobile manufacturers or dealers to lease or sell sedans, station wagons, and mini-vans to school districts or private fleet operators for the purpose of transporting students to and from school and related events? Assuming that the particular vehicle manufactured or sold complies with all FMVSS that apply to that type of vehicle, the answer to your question is yes. Note however, that unlike other motor vehicle types, a school bus is defined by both the vehicle's seating capacity and its intended use. If a manufacturer or dealer is aware that the intended use of a vehicle is to transport students to and from school and related events, it is a violation of Federal law to sell a vehicle with a capacity of 11 or more persons, including the driver, unless the vehicle complies with all FMVSS applicable to school buses. Question 3: Does a school district or private fleet operator increase its liability risk if it purchases passenger vans to transport students to and from school and related events? Question 4: Does a school district or private fleet operator increase its liability risk if it uses passenger vans to transport students to and from school and related events? Question 7: Does a school district or private fleet operator increase its liability risk if it purchases sedans, station wagons, or mini-vans to transport students to and from school and related events? Question 8: Does a school district or private fleet operator increase its liability risk if it uses sedans, station wagons, or mini-vans to transport students to and from school and related events? Liability risk is a question of state, not Federal law. I am not qualified to offer an opinion on how these issues would be resolved under Michigan law. I suggest that you contact the Attorney General for the State of Michigan for an opinion on the application of Michigan law to these situations. You may also wish to consult your agency's attorney and insurance company for more information. I must emphasize, however, NHTSA's position that a vehicle meeting Federal school bus regulations is the safest way to transport students. In addition, I encourage your school districts to give their most careful consideration to the possible consequences of transporting students in vehicles other than school buses. I hope that you find this information helpful. If you have further questions, please contact Mary Versailles of my staff at this address or by telephone at (202) 366-2992. Sincerely,
Paul Jackson Rice Chief Counsel Enclosures ref:VSA#571.3 "school bus" d:4/l2/9l |
1970 |
ID: 2968yyOpen Mr. Jerald L. Mikesell Dear Mr. Mikesell: This responds to your letter of March 25, 1991 requesting "a copy of the federal regulations regarding school vans being used for transporting students." Your letter notes that you "are especially interested in the number of students which can be transported before a van is considered a school bus." I am pleased to have this opportunity to clarify the operation of Federal law as it applies to school buses. Federal law regulates the manufacture and sale of new vehicles. The capacity of a van used to transport students will determine whether the van is considered a "school bus" or a "multipurpose passenger vehicle" under Federal law. The National Highway Traffic Safety Administration (NHTSA) defines "school bus" as a motor vehicle designed for carrying 11 or more persons, including a driver, and sold for transporting students to and from school or school-related events. Given the wording of your letter, I emphasize that it is the capacity of vehicle, not the number of students actually transported, which determines whether a vehicle is a school bus. NHTSA defines "multipurpose passenger vehicle" as a motor vehicle designed for carrying 10 persons or less constructed on a truck chassis. NHTSA has issued Federal motor vehicle safety standards applicable to all new vehicles. It is a violation of Federal law for any person to manufacturer or sell any new vehicle that does not comply with all applicable safety standards. The Federal motor vehicle safety standards are contained in Title 49 of the Code of Federal Regulations (CFR), Part 571. You may find a copy of 49 CFR Part 571 at a Federal Depository Library in your State. If you so choose, you may purchase a copy of the volume of Title 49 which includes Part 571 from the United States Printing Office (GPO), Washington, D.C., 20402, (202) 783-3238. To determine whether your school district may use a vehicle other than a school bus to transport school children, you must look to state law. This is so because the individual States, not the Federal government, have authority over the use of motor vehicles. In addition, use of vehicles other than school buses could result in increased liability in the event of an accident. You might want to consult your attorney and insurance company to discuss this matter. I must emphasize NHTSA's position that a vehicle meeting Federal school bus regulations is the safest way to transport students. I encourage your school district to give its most careful consideration to the possible consequences of transporting students in vehicles that do not comply with these regulations. I hope you find this information helpful. If you have further questions, please contact Mary Versailles of my staff at this address or by telephone at (202) 366-2992. Sincerely,
Paul Jackson Rice Chief Counsel ref:571.3 "school bus" d:4/l2/9l |
1970 |
ID: 2969yyOpen Ms. Jessie M. Flautt Dear Ms. Flautt This responds to your letter to Mr. Steve Kratzke of my staff, requesting that the National Highway Traffic Safety Administration (NHTSA) grant permission to a repair business to modify your motor vehicle. You explained that you are under five feet, two inches and legally blind in one eye. You further explained that, due to the increased size of headrests in recent years, you are unable to locate a 1991 automobile which does not have headrests which impede your field of vision. You wish to arrange to have the size of the headrests in a 1991 automobile reduced. You asked if you could obtain permission from this agency to permit this modification. I hope the following discussion explaining our regulation will be of assistance to you. I would like to begin by clarifying that there is no procedure by which persons petition for and are granted permission from NHTSA to arrange to have a motor vehicle repair business modify their motor vehicle. Repair businesses are permitted to modify vehicles without obtaining permission from NHTSA to do so, but are subject to certain regulatory limits on the type of modifications they may make. In certain limited situations, we have exercised our discretion in enforcing our regulations to provide some allowances to a repair business which cannot conform to our regulations when making modifications to accommodate the special needs of persons with disabilities. Since your situation is among those given special consideration by NHTSA, this letter should provide you with the relief you seek. Our agency is authorized to issue Federal Motor Vehicle Safety Standards (FMVSS) that set performance requirements for new motor vehicles and items of motor vehicle equipment. Manufacturers are required by the National Traffic and Motor Vehicle Safety Act (Safety Act) to certify that their products conform to our safety standards before they can be offered for sale. Manufacturers, distributors, dealers and repair businesses modifying certified vehicles are affected by 108(a)(2)(A) of the Safety Act. It prohibits those businesses from knowingly rendering inoperative any elements of design installed on a vehicle in compliance with a FMVSS. In general, 108(a)(2)(A) would require repair businesses which modify motor vehicles to ensure that they do not remove, disconnect or degrade the performance of safety equipment installed in compliance with an applicable safety standard. Violations of 108(a)(2)(A) are punishable by civil fines up to $1,000 per violation. In situations such as yours where a vehicle must be modified to accommodate the needs of a particular disability, we have been willing to consider any violation of 108(a)(2)(A) a purely technical one justified by public need. I can assure you that NHTSA would not institute enforcement proceedings against a repair business that modifies the headrest on your vehicle to accommodate your condition. We caution, however, that only necessary modifications should be made to the headrest to accommodate your condition and we urge your dealer to modify your vehicle in such a manner that would not degrade from the safety currently provided by your vehicle. Many manufacturers are currently installing headrests in vehicles which exceed the minimum dimensions required by FMVSS No. 202, Head Restraints. I urge you not to have your headrest reduced below these dimensions if it is not necessary for your field of view. If you have further questions or need some additional information in this area, please contact Mary Versailles of my staff at this address or by telephone at (202) 366-2992. Sincerely,
Paul Jackson Rice Chief Counsel /ref:VSA, 202 d:3/26/9l |
2009 |
ID: 2970yyOpen Mr. Rueben K. Brown Dear Mr. Brown: This responds to your letter of March 12, 1991 requesting an interpretation of the applicability of the spike stop requirement in Standard No. 105 to school buses with GVWR greater than 10,000 lbs. While school buses are required by S5.1 to be capable of meeting the requirements of S5.1.1 through S5.1.6, the spike stop requirement in S5.1.6 is only applicable to vehicles with a GVWR of 10,000 lbs. or less. Therefore, school buses with a GVWR greater than 10,000 lbs are not required to be capable of meeting the spike stop requirement. I hope this information has been helpful. If you have further questions, please contact Mary Versailles of my staff at this address or by telephone at (202) 366-2992. Sincerely,
Paul Jackson Rice Chief Counsel ref: 105 d:3/29/9l |
2009 |
ID: 2971yyOpen Gary P. Toth, Esq. Dear Mr. Toth: This responds to your request for an interpretation of how the requirements of Standard No. 209, Seat Belt Assemblies (49 CFR 571.209) would affect some dual-spring retractor designs GM is considering. Your letter said that these dual-spring retractors are designed so that a spring with a lower retraction force is or can be engaged when the safety belt is being worn by an occupant. When the safety belt is removed, a spring with a higher retraction force is engaged to effectively stow the belt webbing. Your letter also said that the retractor for the shoulder belt portion of the lap/shoulder belts on which these designs would be used is an emergency locking retractor (ELR). The minimum and maximum retractor force requirements for ELRs are set forth in S4.3(j)(5) and (6) of Standard No. 209. Those sections specify minimum and maximum retractor force requirements when the retractors "are tested in accordance with the procedures specified in paragraph S5.2(j)." S5.2(j) specifies that, for the purposes of measuring the retractor forces, the webbing shall be fully extended from the retractor and then retracting the webbing to 75 percent extension plus or minus 2 inches. Your letter stated that your dual-spring retractor designs will comply with the minimum retractor force requirements when tested under the conditions specified in S5.2(j). This is because the higher retraction force will always be engaged under those conditions. It appears that, when the higher retraction force is engaged in these dual-spring retractor designs, the retractors will comply with the minimum retractor force requirements. However, when the lower retraction force is engaged, the retractor force is less than the minimum retractor force requirement. Because these dual-spring retractors comply with the retractor force requirements when tested under the conditions specified in S5.2(j) of Standard No. 209, your company is ready to certify these designs as complying with Standard No. 209. You are, however, concerned with the implications of a February 16, 1984 NHTSA interpretation addressed to Mr. Frank Pepe. In that instance, Mr. Pepe stated that the ELR had two tension modes that were activated by the vehicle door. The subject retractor operated in a high tension mode when the vehicle door was open, and in a lower tension mode when the vehicle door was closed. The agency concluded that, because Standard No. 209 does not distinguish between tension modes, the subject retractors would have to comply with all the requirements of the standard, including the minimum and maximum retraction force requirements, in both tension modes. Your letter asked us to reevaluate the conclusions reached in our February 16, 1984 letter to Mr. Pepe. We believe that the facts presented in your letter are significantly different than those that were presented in the Pepe letter, so the conclusions reached in the Pepe letter are not the same we would reach for your company's dual-spring retractors. In the case of the Pepe letter, the starting point for our analysis of whether the retractors would comply with the minimum and maximum retractor force requirements was the language of S4.3(j) in Standard No. 209, which directed us to the test conditions set forth in S5.2(j) of Standard No. 209. However, the test conditions in S5.2(j) [complete extension of the webbing, followed by subsequent retraction to 75 percent extension] did not adjust the Pepe retractors to either the high or low tension mode. Some additional action beyond the conditions specified in S5.2(j) had to be taken to select either the high or low tension mode. Since the selection of the high or low tension mode was not specified in S5.2(j) or elsewhere in Standard No. 209, NHTSA concluded that the retractor would have to be certified as complying with the retractor force requirements when adjusted to either the high or low tension mode. The GM retractors present a significantly different situation. According to your letter, the conditions set forth in S5.2(j) will adjust the GM retractors in a way so that the higher retraction force will always be engaged. Assuming this to be the case, no adjustments beyond the conditions specified in S5.2(j) would be necessary to select a tension mode for the retractors. In these circumstances, compliance with the minimum retractor force requirements would be determined only under the conditions specified in S5.2(j). Sincerely,
Paul Jackson Rice Chief Counsel ref:209 d:4/9/9l |
2009 |
ID: 2972yyOpen Mr. David A. White Dear Mr. White: This responds to your "notification of noncompliance" with 49 CFR Part 567 dated March 12, l99l, and addressed to the Associate Administrator for Enforcement. Grumman has omitted to provide a VIN on the vehicle certification label, as required by section 567.4(g)(6). You have petitioned "to have the noncompliance deemed inconsequential", and are "seeking relief from the notification and repair requirements based on that possibility." The National Traffic and Motor Vehicle Safety Act requires notification and remedy for noncompliances with Federal motor vehicle safety standards, and for defects that relate to motor vehicle safety. The requirement that Grumman fails to meet is not contained in Safety Standard No. 115 Vehicle Identification Number, but in a regulation that is not part of the Safety Standards (Part 571). Thus, a noncompliance with a Federal motor vehicle safety standard has not occurred. Furthermore, failure to provide information on the certification label in accordance with Part 567 is not a "defect". The Act defines a defect as a "defect in performance, construction, components or materials." Clearly this does not exist. In sum, there is no legal obligation upon Grumman Olson to notify and remedy under these circumstances, and the company is free to take whatever action it deems desirable in this case. Failure to comply with Part 567 is a violation of the Safety Act for which a civil penalty may be imposed, but the agency does not intend to seek a penalty in this matter. Nonetheless, we encourage Grumman Olson to take steps necessary to ensure that further violations do not occur. Sincerely,
Paul Jackson Rice Chief Counsel ref:556 d:4/25/9l |
2009 |
ID: 2973yyOpen Mr. Paul R. Kirchgraber Dear Mr. Kirchgraber: This is in reply to your letter of April 16, 1991, with respect to which Federal motor vehicle safety standards, if any, must be met in order to sell an exterior tire/wheel cover with reflective characteristics that will help to make "the vehicle more visible to the surrounding traffic." In addition, you "want to be certain that the reflective nature of the fabric used in this cover does not present a safety hazard", and ask for the citation to "appropriate federal test standards from the code of federal regulations for similar automotive accessories." There are no Federal motor vehicle safety standards that establish performance requirements for reflective material of this nature, or for wheel coverings on exterior-mounted tires. The standard on vehicle lighting, Motor Vehicle Safety Standard No. l08, does prohibit, as original equipment, the installation of a "reflective device or other motor vehicle equipment" that impairs the effectiveness of lighting equipment required by the standard. It is theoretically possible that your material could create glare in the eyes of a following operator so that (s)he would fail to respond to a stop signal, or a turn signal. The samples submitted with your letter are too small for us to judge its reflectivity, and we suggest that you conduct your own tests, approaching a vehicle with the tire cover from the rear, with headlamps on the lower beam. This, to us, is preferable to your redesigning the material to conform to any federal test standard relating to reflectivity. Although the color of lighting equipment on the rear is generally red, with amber permitted for turn signals, and white required for back up lamps, we do not believe that the use of additional colors would create any confusion. In short, we believe that the wheel cover will be perceived for the wheel cover it is. I hope that this responds to your concerns. Sincerely,
Paul Jackson Rice Chief Counsel ref:l08 d:5/6/9l |
2009 |
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.