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
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ID: aiam5041OpenMs. R. Marie McFadden Cable Car Concepts Inc. P.O. Box 6500 Deltona, FL 32728; Ms. R. Marie McFadden Cable Car Concepts Inc. P.O. Box 6500 Deltona FL 32728; "Dear Ms. McFadden: This responds to your June 23, 1992 lette requesting information on Federal regulations concerning safety belts and seating in vehicles manufactured by your company. These vehicles are the 'Mini Trolley,' the 'Road Train,' and the 'Trolley Tram.' You indicated that these vehicles can be used on the highway and are motorized, licensed vehicles. I am pleased to have this opportunity to explain our regulations to you. Some background information on Federal motor vehicle safety laws and regulations may be helpful. Our agency is authorized, under the National Traffic and Motor Vehicle Safety Act (15 U.S.C. 1381 et seq., Safety Act), to issue safety standards applicable to new motor vehicles and items of motor vehicle equipment. NHTSA, however, does not approve motor vehicles or motor vehicle equipment, nor do we endorse any commercial products. Instead, the Safety Act establishes a 'self-certification' process under which each manufacturer is responsible for certifying that its products meet all applicable safety standards. The following represents our opinion based on the facts provided in your letter. NHTSA's safety standards specify different requirements for different types of motor vehicles. Therefore, in order to answer your specific questions, it is necessary to determine how each of your vehicles is classified under our regulations. NHTSA defines a 'bus' as 'a motor vehicle with motive power, except a trailer, designed for carrying more than 10 persons.' Your literature indicates that the 'Mini Trolley' has a passenger capacity of 18, and that the power unit of the 'Trolley Tram' has a passenger capacity of 22. Therefore, both of these vehicles would be considered a 'bus' for the purpose of Federal regulations. NHTSA defines a 'truck' as 'a motor vehicle with motive power, except a trailer, designed primarily for the transportation of property or special purpose equipment.' The power unit of the 'Road Train' has seating capacity for only one passenger, and the primary use appears to be to draw the coaches. Therefore, it appears that this vehicle is a 'truck' for the purpose of Federal regulations. NHTSA defines a 'trailer' as 'a motor vehicle with or without motive power, designed for carrying persons or property and for being drawn by another motor vehicle.' The coaches for the 'Road Train' and the 'Trolley Tram' would be considered trailers for the purpose of Federal regulations. Your specific questions and the answers to each follow. You asked us to answer these questions for vehicles manufactured both before and after September 1, 1991. 1. Our small unit has a GVW of 12,300, we understand that we need seat belts for the driver only, this small unit is an eighteen passenger. Our largest is a thirty-two passenger unit with a GVW of 17,000 lbs. The safety belt installation requirements are set forth in Standard No. 208, Occupant Crash Protection. This standard specifies requirements based on vehicle type and seating position within the vehicle. Different requirements also apply depending on the GVWR of the vehicle. The discussion which follows is limited to vehicles with a GVWR greater than 10,000 pounds. As explained below, buses such as the 'Mini Trolley' and the power unit of the 'Trolley Tram' are required to have, at a minimum, a lap belt at the driver's position, trucks such as the power unit of the 'Road Train' are required to have, at a minimum, a lap belt at every designated seating position, and trailers such as the coaches for the 'Road Train' and the 'Trolley Tram' are not required to have any type of safety belt at any seating position. The requirements for buses with a GVWR of more than 10,000 pounds are contained in S4.4 of Standard No. 208. Section S4.4.1 gives vehicle manufacturers a choice of two options for providing occupant crash protection in buses manufactured on or after January 1, 1972 and before September 1, 1990. Option 1, set forth in S4.4.1.1, requires vehicle manufacturers to provide an automatic protection system at the driver's seating position that meets the frontal and lateral crash protection and rollover requirements. Option 2, set forth in S4.4.1.2 requires vehicle manufacturers to install a lap or lap/shoulder belt at the driver's seating position. Buses manufactured on or after September 1, 1990 are allowed the same two options, however, S4.4.2.2 specifies that, if a manufacturer chooses to comply with Option 2, the lap belt or pelvic portion of the lap/shoulder belt must have either an emergency locking retractor (ELR) or an automatic locking retractor (ALR). The requirements for trucks with a GVWR of 10,000 pounds or more are contained in section S4.3 of Standard No. 208. Section 4.3.1 gives vehicle manufacturers a choice of two options for providing occupant crash protection in trucks manufactured on or after January 1, 1972 and before September 1, 1990. Option 1, set forth in S4.3.1.1, requires vehicle manufacturers to provide an automatic protection system at all seating positions that meets the frontal and lateral crash protection and rollover requirements. Option 2, set forth in S4.3.1.2 requires vehicle manufacturers to install lap or lap/shoulder belts at every seating position. Trucks manufactured on or after September 1, 1990 are allowed the same two options, however, S4.3.2 specifies that, if a manufacturer chooses to comply with Option 2, the lap belt or pelvic portion of a lap/shoulder belt must have either an ELR or an ALR. Standard No. 208 does not apply to trailers. Therefore, the coaches for the 'Road Train' and the 'Trolley Tram' are not required to have safety belts. 2. As you can see on our Tram specs we do have oak seats, is there a ruling on this at all. The seating requirements are contained in Standard No. 207, Seating Systems. This standard includes strength requirements for all 'occupant seats' in passenger cars, multipurpose passenger vehicles, and trucks, and for the driver's seats in buses, except that the requirements do not apply to side- facing seats. Therefore, the driver's seat in the 'Mini Trolley' and the power unit of the 'Trolley Tram,' and all 'occupant seats' in the power unit of the 'Road Train' must meet the requirements of Standard No. 207. The standard does not specify that seats must be made of a particular material, therefore, oak seats are permitted if they comply with the standard. As with Standard No. 208, Standard No. 207 does not apply to trailers. Therefore, the seats in the coaches for the 'Road Train' and the 'Trolley Tram' are not subject to the requirements of Standard No. 207. We have one seat on some of our vehicles that we refer to as a jump seat it is located in front of the entrance door, this seats two people and faces the driver. Would the same ruling apply to this seat as for the other passenger seats. As stated above, Standard No. 207 applies only to the driver's seat in buses such as the 'Mini Trolley' or the power unit of the 'Trolley Tram.' If the jump seat is in the power unit of the 'Road Train,' and if it is not a side- facing seat, it must meet the requirements of Standard No. 207 if it is an 'occupant seat' as defined in that standard. Section S3 of Standard No. 207 defines an 'occupant seat' as 'a seat that provides at least one designated seating position.' A 'designated seating position' is defined at 49 CFR 571.3 as any plain view location capable of accommodating a person at least as large as a 5th percentile adult female, if the overall seat configuration and design is such that the position is likely to be used as a seating position while the vehicle is in motion, except for auxiliary seating accommodations such as temporary or folding jump seats. Your letter does not contain enough information to determine whether your seat would be considered an auxiliary seating position. If it is, it is not subject to Standard No. 207. I hope you find this information helpful. If you have any other questions, please contact Mary Versailles of my staff at this address or by phone at (202) 366-2992. Sincerely, Paul Jackson Rice Chief Counsel"; |
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ID: aiam4707OpenMr. T. Chikada Manager, Automotive Lighting Engineering Control Dept. Stanley Electric Co., Ltd. 2-9-13, Nakameguro, Meguro-ku Tokyo 153, Japan; Mr. T. Chikada Manager Automotive Lighting Engineering Control Dept. Stanley Electric Co. Ltd. 2-9-13 Nakameguro Meguro-ku Tokyo 153 Japan; Dear Mr. Chikada: This is in reply to your letter with respect to tw types of decorative lighting devices intended for installation 'on the rear face, and at the top of optional motorcycle rear trunks respectively.' I regret the delay in responding. Type A and Type B would be installed on the same motorcycle. Type A would be installed at the top of the trunk. It consists of an elongated device, illuminated by LEDs when the taillamp is on. Type B is installed on the motorcycle itself. It is a rectangular device, illuminated by an incandescent bulb, which is mounted on the vertical centerline and is flanked by the tail and stop lamps. The distance between the center of the light sources on the two devices is 290mm. (approximately ll 1/2 inches). Both devices emit red light, and their maximum intensity is less than the minimum intensity of the taillamp. You have asked whether it is permitted to equip a motorcycle with the Type A and Type B accessory lamps. If the answer is affirmative, you have asked whether an LED could be used as the light source for Type B. You have also asked whether the maximum intensity of each device separately should be less than the minimum intensity of the tail lamp, or whether the combined maximum intensity of both devices should be less than the minimum intensity of the tail lamp. Paragraph S5.1.3 of Federal Motor Vehicle Safety Standard No. 108 (formerly S4.1.3) permits the installation of these lamps if they do not impair the effectiveness of the lighting equipment required by the standard. In this instance, the question to be asked is whether the devices, activated with the taillamps, impair the effectiveness of the taillamps, or the stop lamps. The devices are, in effect, supplemental taillamps, and as such, arguably do not appear to impair the effectiveness of the taillamps required by the standard no matter what their intensity is. The diagram of Type B indicates that the stop lamps and taillamps are in the same compartment, presumably incorporating a dual filament bulb. Although the stop lamps when activated are brighter than the taillamps, their proximity to the supplemental devices Type A and Type B, each of which are emitting a red light, leads to the possibility that the stop signal would not be as effective as it would be were there no other red lights in the vicinity, and hence impaired within the meaning of S5.1.3. A stop signal must be instantly perceived so that a following driver may determine appropriate action to take. However, we note that this configuration is similar to other stop/taillamp configurations on many vehicles in use on the highways. This would indicate that such configurations do not result in impairment. Thus, the answer to your first question is that both Types of devices are permitted under the standard. Your second question is whether LEDs are acceptable light sources for Type B. Since there is no restriction on light sources for a lighting device not required by Standard No. 108, you may use the LEDs as light sources. Your third question is whether the maximum intensity of Type A and Type B, separately, should be less than the minimum intensity of the taillamp. Even though Type A and Type B are optional devices, in the configuration depicted where Type B is immediately flanked on both sides by a taillamp, the appearance of the three lamps would be that of a multicompartment lamp, even though they may actually be separate. To help assure that impairment of either the taillamp or stop lamp does not occur, the intensity of Type B should be identical with that of the taillamps. Otherwise, observers may assume that Type B (which you intend to have an intensity less than a taillamp) is actually the taillamp, and the actual taillamps (which you intend to have an intensity greater than Type B) might appear to be stop lamps that are continually on. This would be deemed impairment since there would be three intensity levels, increasing the possibility of confusion of the intent of the lamps. As for Type A, its vertical separation decreases the possibility for confusion. If the light sources are LEDs, the color would be a different shade of red that the stop and taillamps. Thus, the intensity is less important. However, it functions as an auxiliary taillamp and should be within the same intensity range as the original equipment taillamps. Finally, you asked whether the combined maximum intensity of both devices would be less than the minimum intensity of the taillamps. Again, this would create three levels of intensity, and could cause confusion in understanding the intent of the lamps. As noted above, the individual intensities should be similar to the intensity of the taillamps. I hope that this answers your questions. Sincerely, Stephen P. Wood Acting Chief Counsel; |
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ID: aiam3918OpenMr. Robert M. Levy, Manager, Design Engineering, Abex Corporation, Signal-Stat Division, P.O. Box 438, Somerset, NJ 08873-3492; Mr. Robert M. Levy Manager Design Engineering Abex Corporation Signal-Stat Division P.O. Box 438 Somerset NJ 08873-3492; Dear Mr. Levy: This is in reply to your letter of February 25, 1985, to Frank Berndt the former Chief Counsel of this agency, asking for clarification of an interpretation of Safety Standard No. 108 that this agency furnished last year to Wesbar Corp.; On May 16, 1984, Wesbar asked whether the correct minimum effectiv luminous lens area on stop lamps and turn signal lamps was 8 square inches or 12 square inches, when intended for use on trailers whose overall width is 80 inches or greater. This office advised Wesbar on July 3, 1984, that as specified in SAE J586c for stop lamps and SAE J588e for turn signal lamps, the answer was 8 square inches. Your letter calls to our attention the fact that these SAE standards require each stop and turn signal lamp to have a minimum of 12 square inches in those vehicle configurations where two stop or turn signal lamps are mounted on the same side of the vehicle and are closer to each other than 22 inches.; Thank you for calling this oversight to our attention. Indeed, SA J586c and J588e establish this exception to the general minimum requirement of 8 square inches. We are furnishing a copy of this letter to Wesbar and apologize for any confusion that the earlier letter has caused.; Sincerely, Jeffrey R. Miller, Chief Counsel |
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ID: aiam3740OpenMr. Paul Scully, Vice President, Peterson Manufacturing Company, 4200 East 135th Street, Grandview, MO 64030; Mr. Paul Scully Vice President Peterson Manufacturing Company 4200 East 135th Street Grandview MO 64030; Dear Mr. Scully: This is in reply to your letter of July 22, 1983, to Mr. Cavey of thi agency.; With respect to paragraph S4.1.1.7 of Standard No. 108 *Lamps Reflective Devices, and Associated Equipment* you have stated your understanding that that paragraph applies only to turn signal lamps manufactured between January 1, 1972 and September 1, 1973, and that turn signal lamps must now comply with SAE Standard J588e, September 1970.; Paragraph S4.1.1.7 did allow vehicular compliance with SAE J588d as a option to J588e. J588d required that any turn signal lamp used on a vehicle whose overall width was 80 inches or more have a minimum of 12 square inches effective projected luminous lens area. On the other hand, SAE J588e requires a minimum of 8 square inches effective projected luminous lens area on all single compartment rear turn signal lamps, regardless of vehicle width. However, on vehicles 80 inches or more in overall width, two turn signal lamps or compartments per side may be mounted closer together than 22 inches provided each meets single compartment photometric requirements and each has a minimum effective projected luminous lens area of 12 square inches. Thus, your understanding is correct.; I would also point out that, pursuant to Section S4.7.1 of Standard No 108, the continued manufacture of turn signal lamps meeting J588d is permissible as replacement equipment for vehicles manufactured between January 1, 1972 and September 1, 1978.; Mr. Cavey has provided the copy of BMCS regulations which is enclosed. Sincerely, Frank Berndt, Chief Counsel |
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ID: aiam5092OpenMr. Mike Love Manager, Compliance Porsche Cars North America, Inc. P. O. Box 30911 Reno, Nevada 89520-3911; Mr. Mike Love Manager Compliance Porsche Cars North America Inc. P. O. Box 30911 Reno Nevada 89520-3911; "Dear Mr. Love: This responds to your request that NHTSA determine tha a proposed modification to a previously approved antitheft device on the Porsche 911 car line constitutes a de minimis change to the device. The change is proposed to be made on only one model in the 911 line and to be effective beginning with the 1994 model year (MY). As explained below, the agency concludes that the proposed change to the antitheft device is not a de minimis change. As you are aware, in a Federal Register notice of June 2, 1989 (54 FR 23727), NHTSA determined that the antitheft device, to be placed as standard equipment on the MY 1990 Porsche 911 car line, was likely to be as effective as parts marking. Subsequently, by letter dated May 31, 1990, the agency concluded that proposed changes to the antitheft device in the MY 1991 Porsche 911 car line were de minimis changes. The primary change for the 1991 model year was that the interior light control units were to be integrated with the alarm control unit and central locking system. The latter two components were already integrated. For the following reasons, NHTSA concludes that the proposed change to the antitheft device for the 1994 model year is not de minimis. In reaching this conclusion, we looked primarily at the anti-theft system on which the exemption was originally based. Under the original system, locking one door would automatically lock all doors, as well as arm the alarm system. Under the proposed change, locking one door with the key would no longer automatically lock all doors, but would still arm the alarm system. This is not an insignificant change like the substitution of new components for old components, each serving the same function. Nor does the change involve adding a feature making an exempted antitheft device even more effective. The change in question lessens the likelihood that all doors of a car will be locked, thus easing a thief's access to the passenger compartment. A thief may easily open the unlocked door, providing an opportunity to attempt to shut off the alarm system (since both the alarm control unit and the power lines from the battery to the alarm system are inside the vehicle) and to circumvent the engine disabling system. If the thief successfully overcomes these systems, theft of the entire vehicle or its parts is facilitated. Once inside the vehicle, a thief may open the hood by a release in the vehicle interior, thereby gaining access to the storage space under the hood. Since the battery for the Porsche 911 is also located in the front hood compartment of the vehicle, access to the battery also makes it easier for a thief to attempt to shut off the alarm system and engine disabling system, again facilitating theft of the entire vehicle or its parts. Because the same aspects of performance (i.e., the central door locking system that automatically locked all doors, making access to the vehicle interior and hood release more difficult), are not provided in the proposed device, resulting in the possibility of the vehicle's increased vulnerability to being stolen in whole, or to have its parts stolen, this agency concludes that Porsche's proposed modification to the antitheft device in one model in the MY 1994 911 car line is not a de minimis change. If Porsche wishes to place its proposed antitheft device on the 911 car line, it must formally file a petition with NHTSA pursuant to 49 CFR 543.9(c)(2). Please note that the petition for a modification must provide the same information for the modified device as is required under 543.6 for a new device. This includes the statement in 543.6(a)(1) that the antitheft device will be installed as standard equipment on all cars in the line for which an exemption is sought. Since the modification planned by Porsche would result in one model within the car line lacking a feature found on the anti-theft systems of other models, the agency would determine in the following manner whether the car line continued to merit exemption. It would regard the system of the one model as the system of the car line as a whole and assess whether that system would be as effective in preventing theft as parts marking. The additional feature on the other models within the car line, i.e., the central locking system, would be regarded as an addition to the standard equipment system and would not have any bearing upon the exemptability of the car line. NHTSA notes that this same approach would not be taken if the system to be installed on a single model within a car line could not be regarded as a stripped down version of the system on the other models. In that case, there would be no standard equipment version of the system and the car line would not be eligible for an exemption. If you have any questions, please contact Ms. Barbara A. Gray, Chief, Motor Vehicle Theft Division, Office of Market Incentives, Office of Rulemaking, NHTSA, at this address or by telephone at (202) 366-1740. Sincerely, Barry Felrice Associate Administrator for Rulemaking"; |
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ID: aiam3033OpenJohn H. Latshaw, Jr., Esq., Messrs. Topkins, Gammin & Krattenmaker, 151 Tremont Street, Boston MA 02111; John H. Latshaw Jr. Esq. Messrs. Topkins Gammin & Krattenmaker 151 Tremont Street Boston MA 02111; Dear Mr. Latshaw: RE: The Back Rack (T.M.) Carrier by Ennova, Inc. This is in reply to your letter of March 13, 1979, to John Womack o this office on behalf of your client Ennova, Inc. Ennova wishes to market a 'back rack carrier', and you have asked several questions with respect to its legality under Federal requirements. The photographs which you enclosed show that the carrier structure is attached to both the front and rear bumpers, and that loads may be carried on the top of the vehicle as well as on a shelf directly behind the vehicle's rear bumper.; Your questions and our answers are: '1. Are equipment carriers which fasten to a privately owned moto vehicle regulated by the National Highway Traffic and Safety Act (hereinafter, the NHTSA) so that state law in this area is preempted?; 2. Does the NHTSA contain any standards or regulations pertaining t roof racks or equipment carriers? Does the motor vehicle safety act contain any such regulations?'; An equipment carrier that attaches to a motor vehicle is an item o 'motor vehicle equipment' as defined by 15 U.S.C. 1391(4), and your client is a 'manufacturer' as defined by 15 U.S.C. 1391(5). There are no Federal motor vehicle safety standards that cover this type of motor vehicle equipment, and, therefore, a State is not preempted by 15 U.S.C. 1392(d)) (sic) from prescribing its own safety standards for it. If a safety related defect were discovered in the 'Back Rack', Ennova would be responsible for notification and remedy of it, as required by 15 U.S.C. 1411 *et seq*.; '3. Does the NHTSA establish any guidelines for motor vehicle bumper or fenders which the Back Rack (T.M.) Carrier appears to violate? Does the fact that the rear platform extends out behind the vehicle place the Rack in contravention of any Federal standards?; The Back Rack is intended to become affixed to the rear bumper in semipermanent manner and protrude therefrom. Does this bring the carrier into a regulated area? Is (sic) so, what is the citation of the regulations and what must be done to conform the platform to same?; 4. Does the height, width or depth of any aspect of the Back Rac (T.M.) Carrier present a problem?; 5. The structural supports of the Back Rack (T.M.) Carrier obscure th vehicle's lighting in some aspects both front and rear. Does the obstruction violate any provisions of the NHTSA or the Motor Vehicle Safety Act?; 8. If the Back Rack (T.M.) Carrier as it appears in the photograph were installed by a dealer, would it be in contravention of any federal law, standard or regulation exclusive of laws relating to products liability and defective equipment.'; Your questions concern our jurisdiction over a vehicle before and afte its sale to its first purchaser for purposes other than resale. A dealer has the responsiblity (sic) to deliver to its owner a new vehicle in full compliance with all applicable Federal motor vehicle safety standards. Paragraph S4.1.3 of Standard No. 108 prohibits the installation of any 'additional lamp, reflective device, or other motor vehicle equipment ... that impairs the effectiveness of lighting equipment required by this standard.' Paragraph S4.3.1 requires that 'no part of the vehicle shall prevent a parking lamp, taillamp, stop lamp, turn signal lamp, or backup lamp from meeting its photometric output at any applicable group of test points specified in Figures 1 and 3 [Standard No. 108], or prevent any other lamp from meeting the photometric output at any test point specified in any applicable 'SAE Standard on Recommended Practice'. Therefore, a dealer could not deliver a new car with the Back Rack installed if it impairs the effectiveness of the car's lamps or reflectors or impairs photometric output. After sale, a dealer (or distributor or manufacturer, but not the vehicle owner) has a responsibility under 15 U.S.C. 1397(a) (2) (A) of not 'knowingly rendering inoperative in whole or in part, any device or element design installed on ... a motor vehicle ... in compliance with an applicable Federal motor vehicle safety standard ....' In the context of Standard No. 108 we have equated a rendering inoperative with impaired effectiveness or impaired photometrics so that the same consideration would apply, a dealer could not install the Back Rack on a used vehicle if it affects compliance with Standard No. 108.; The installation of the Back Rack appears to present some complianc problems. Based upon an informal review and the photographs you submitted, the front part of the carrier may reduce headlamp candlepower output below the required minimum at several test points, as for example, at test points HV, H-3R and 3L and H 9R and 9L on the upper beam, and at test points 1 1/2 D-2R, 1/2 D-1 1/2 R on the low beam.; Looking at the turn signals which are required to have an 8.0 squar inch minimum projected luminous area, the carrier support design may mask them to the extent that the direction of the turn signal might not be clearly understood. The carrier support location may not allow these lamps to provide an unobstructed effective projected illuminated area of outer lens surface, excluding reflex, of at least 2 square inches, measured at 45 degrees to the longitudinal axis of the vehicle. This requirement must also be met by the taillamps. Further with respect to the taillamps, with the carrier in place, they may not be visible through a horizontal angle from 45 degrees to the left and/or right, as Standard No. 108 requries (sic).; The design location of the carrier supports may reduce the minimu effective projected luminous area of the stop lamps below the 8 square inch minimum of Standard No. 108.; As for backup lamps, the visibility requirements are complex, those o SAE Standard J593c as modified by S4.1.1.22 of Standard No. 108, but in essence the lamps must be 'readily visible' to use your phrase.; These interpretations are based upon the photographs you supplied, an are meant to be illustrative as there are many different lighting configurations on vehicles, and we do not know that the Back Rack would affect compliance in all instances.; '7. What are the dimensional requirements of headlight, parking directional and tail lights? What percentage of these lenses must be totally visible?'; Dimensional requirements of headlights conform to SAE J571d *Dimensional Specifications of Sealed Beam Headlamp Units*, June 1966, parking lights, SAE J 222, *Parking Lamps (Position Lamps)* December 1970, direction lights (turn signals) SAE J588e *Turn Signal Lamps (Rear Position Light)*, August 1970. Copies of the foregoing SAE Standards are attached. In addition, the minima and maxima of lens visibility requirements for parking lamps, turn signal lamps and taillamps are set forth in these SAE Standards. The minimum and maximum photometric requirements of headlights are set forth in SAE J 579a, August 1965 and J 579c, December 1974, as well as the design parameters of rectangular headlamp units SAE J 1132, *Sealed Beam Headlamp Units for Motor Vehicles* (copies also attached).; I hope this answers your questions. Sincerely, Frank Berndt, Chief Counsel |
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ID: aiam4114OpenMr. Doug Cole, Director of Public Relations and Membership, National Van Conversion Association, Inc., 2 West Main Street, Suite 2, Greenfield, IN 46140; Mr. Doug Cole Director of Public Relations and Membership National Van Conversion Association Inc. 2 West Main Street Suite 2 Greenfield IN 46140; Dear Mr. Cole: Thank you for your letter of December 2, 1985 to Stephen Oesch of m staff concerning how our regulations would affect the placement of a National Van Conversion Association (NVCA) certification decal on vehicle windows by a van conversion company. The material enclosed with your letter explains that the NVCA certification program is a voluntary effort by the van conversion industry to set minimum safety and quality standards for its products. You explained that the decal, which has a diameter of 2 1/2 inches, would be placed on the lower corner of the passenger's side of the windshield by a manufacturer whose products conform to the NVCA program.; Placement of the decals on a vehicle's windshield would be affected b Federal Motor Vehicle Safety Standard No. 205, *Glazing Materials*, which specifies performance and location requirements for glazing used in vehicles. These requirements include specifications for minimum levels of light transmittance (70% in areas requisite for driving visibility, which includes the windshield in motor vehicles).; Part 567, *Certification*, of our regulations requires each vehicl manufacturer to place a plate within the vehicle certifying that the vehicle conforms to all applicable Federal motor vehicle safety standards. A person, such as a van converter, who makes significant modifications to a vehicle prior to its first sale to a consumer is considered a vehicle alterer under our regulations. Under Part 567.7, an alterer must also add a plate to the vehicle certifying that the vehicle, as altered, still continues to conform to all applicable Federal motor vehicle safety standards. Thus, no manufacturer or alterer is permitted to install solar films and other sun screening devices or other opaque materials in new vehicles without certifying that the vehicle continues to be in compliance with the light transmittance and other requirements of the standard.; After a vehicle is first sold to a consumer, modifications to a vehicl are affected by section 108(a)(2)(A) of the Vehicle Safety Act. That section prohibits commercial businesses from tampering with safety equipment installed on a vehicle in compliance with our standards. Thus, no dealer, manufacturer, repair business or distributor can install a sun screen device for the owner of the vehicle, if the device would cause the window not to meet the requirements of Standard No. 205. Violation of the 'render inoperative' provision can result in Federal civil penalties of up to $1,000 for each violation.; We have not previously ruled on whether these prohibitions apply to th installation of State vehicle inspection and private industry regulatory decals by commercial businesses. In general, these decals are small in size and placed in locations which minimize the obstruction, if any, to the driver's vision. In contrast, tinting films and other sun screening devices are generally applied to the entire window and thus can substantially obscure the driver's vision if they do not meet the light transmittance and other performance requirements of the standard. As with State regulatory decals, your proposed decal is small in size and would be placed in the lower right corner of the vehicle windshield, an area which should minimize any possible obstructing of the driver's vision. Given these considerations, we would consider the placement of the NVCA decal in the lower right hand corner of the windshield to be merely a technical violation of Standard No. 205, and would exercise our prosecutorial discretion and not bring an enforcement action.; I hope this information is of assistance to you. If you have an further questions, please let me know.; Sincerely, Erika Z. Jones, Chief Counsel |
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ID: aiam5436OpenMr. Richard Kreutziger Executive Director New York School Bus Distributors Association 102 Grace Street Penn Yan, NY 14527; Mr. Richard Kreutziger Executive Director New York School Bus Distributors Association 102 Grace Street Penn Yan NY 14527; Dear Mr. Kreutziger: This responds to your facsimile transmittal lette to me of July 19, 1994. Your letter referred to Federal Motor Vehicle Safety Standard (FMVSS) No. 217, Bus Emergency Exits and Window Retention and Release (49 CFR 571.217), and asked whether emergency exits on school buses with a gross vehicle weight rating (GVWR) of less than 4,536 kilograms (10,000 pounds) and a passenger capacity of 2 to 16 seated and/or wheelchair positions, are required to be outlined with retroreflective tape as specified in paragraph S5.5.3(c) of the standard. In 49 CFR 571.3, this agency defines a bus as a motor vehicle, except a trailer, designed to carry more than 10 persons, and further defines a school bus as A bus that is sold, or introduced in interstate commerce, for purposes that include carrying students to and from school or related events, but does not include a bus designed and sold for operation as a common carrier in urban transportation. Whether or not a vehicle is a school bus, therefore, depends on its use (transporting the specified students) and seating capacity (more than 10), and not GVWR. Accordingly, if the seating capacity of a vehicle is 10 or less, it is not a bus and likewise not a school bus, regardless of use or GVWR. Such a vehicle would not be required to comply with the requirements of FMVSS No. 217. Vehicles meeting the definition of school bus would be subject to the requirements of FMVSS No. 217. Section S5.5 of the standard, Emergency Exit Identification, specifies the marking requirements for emergency exits on all buses. Sections S5.5.1 and S5.5.2 apply to non-school buses, while section S5.5.3 applies to all school buses, without regard to GVWR. Paragraph S5.5.3(c) provides: Each opening for a required emergency exit shall be outlined around its outside perimeter with a minimum 3 centimeters wide retroreflective tape, either red, white, or yellow in color, that when tested under the conditions specified in S6.1 of 571.131, meets the criteria specified in Table 1. We would like to emphasize two points with regard to your letter. The first is that only those emergency exits that are required by the standard are subject to this provision. Extra emergency exits added as options are encouraged, but not required, to be outlined with the tape. The other point is one that I made in a May 18, 1994 letter to you. A technical amendment is pending publication which will amend the size requirement for the width of the retroreflective tape, from a minimum of 3 centimeters (cm.) to a minimum of 2.5 cm. That amendment is necessary because retroreflective tape is not commercially available in 3 cm. widths. Until the correction is issued, NHTSA will not take enforcement measures regarding tape width size against a manufacturer who uses one inch wide (minimum 2.5 cm.) retroreflective tape. In closing, bear in mind that all school buses are required to have a specified number of emergency exits, the number and location of which depend on the seating capacity of the vehicle, regardless of the GVWR, and all required emergency exits must be outlined with the retroreflective tape. I hope this information is helpful to you. Should you have any further questions or need any additional information, please feel free to contact Walter Myers of my staff at this address or at (202) 366-2992. Sincerely, John Womack Acting Chief Counsel; |
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ID: aiam4111OpenMr. Marshall D. Carter, Whisper Electric Car AS, 87 Hadsundve, Als, DK-9560 Hadsund, Denmark; Mr. Marshall D. Carter Whisper Electric Car AS 87 Hadsundve Als DK-9560 Hadsund Denmark; Dear Mr. Carter: This is in reply to your letter of February 18, 1986, asking tw questions with respect to the Federal motor vehicle safety standards.; With respect to electric vehicles, you have asked 'is there a standar regulating the minimum length of time that the hazard light must be able to function at a minimum intensity, on the service battery alone?' There is no such standard. The vehicle must be equipped with a hazard warning signal operating unit designed to conform to SAE J910, January 1966, and a hazard warning signal flasher designed to conform to SAE J945, February 1966, but there is no requirement in the Federal motor vehicle safety standard on vehicle lighting, Standard No. 108, that the hazard warning signal flashers perform for a minimum specified period of time in service.; You have also asked 'Is there a requirement that the vehicle b equipped with an illuminated display, indicating gear selection?' We are unable to confirm your conclusion that there is no such requirement under Standard No. 101. Paragraph S3.2 of Standard No. 102 requires that identification of shift lever positions or patterns be permanently displayed in front of the driver. Paragraph S5.3.1 of Standard No. 101 requires illumination of the 'gauges' listed in Column 1 of Table 2 that are accompanied by the word 'Yes' in Column 5. The last 'gauge' listed is 'Automatic gear position', and the word 'Yes' appears in Column 5. The automatic gear position is a 'gauge' as defined by paragraph S4 of Standard No. 101, 'a display that is listed in ...Table 2 and is not a telltale'. Thus the Federal standards do require illumination of the gear positions of automatic transmissions, but not of manual ones.; I hope that this responds to your questions. Sincerely, Erika Z. Jones, Chief Counsel |
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ID: aiam4112OpenMr. Marshall D. Carter, Whisper Electric Car AS, 87 Hadsundve, Als, DK-9560 Hadsund, Denmark; Mr. Marshall D. Carter Whisper Electric Car AS 87 Hadsundve Als DK-9560 Hadsund Denmark; Dear Mr. Carter: This is in reply to your letter of February 18, 1986, asking tw questions with respect to the Federal motor vehicle safety standards.; With respect to electric vehicles, you have asked 'is there a standar regulating the minimum length of time that the hazard light must be able to function at a minimum intensity, on the service battery alone?' There is no such standard. The vehicle must be equipped with a hazard warning signal operating unit designed to conform to SAE J910, January 1966, and a hazard warning signal flasher designed to conform to SAE J945, February 1966, but there is no requirement in the Federal motor vehicle safety standard on vehicle lighting, Standard No. 108, that the hazard warning signal flashers perform for a minimum specified period of time in service.; You have also asked 'Is there a requirement that the vehicle b equipped with an illuminated display, indicating gear selection?' We are unable to confirm your conclusion that there is no such requirement under Standard No. 101. Paragraph S3.2 of Standard No. 102 requires that identification of shift lever positions or patterns be permanently displayed in front of the driver. Paragraph S5.3.1 of Standard No. 101 requires illumination of the 'gauges' listed in Column 1 of Table 2 that are accompanied by the word 'Yes' in Column 5. The last 'gauge' listed is 'Automatic gear position', and the word 'Yes' appears in Column 5. The automatic gear position is a 'gauge' as defined by paragraph S4 of Standard No. 101, 'a display that is listed in ...Table 2 and is not a telltale'. Thus the Federal standards do require illumination of the gear positions of automatic transmissions, but not of manual ones.; I hope that this responds to your questions. Sincerely, Erika Z. Jones, Chief Counsel |
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.