NHTSA Interpretation File Search
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Understanding NHTSA’s Online Interpretation Files
- 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
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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.”
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NHTSA's Interpretation Files Search
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ID: nht73-3.27OpenDATE: 02/15/73 FROM: AUTHOR UNAVAILABLE; Richard B. Dyson; NHTSA TO: Kelsey-Hayes Company TITLE: FMVSS INTERPRETATION TEXT: This is in reply to your letters of October 23, 1972 and January 25, 1973, concerning the intent of the antilock performance requirements of Motor Vehicle Safety Standard No. 121. I apologize for our delay. Your question arises from an amendment to S5.3.1 of the standard. As originally adopted in February 1971, the section required that the vehicle be capable of stopping without wheel lockup except for "momentary" lockup allowed by an antilock system. As amended in February 1972, the word "controlled" is used in place of "momentary", so that the section now provides that stops are made without lockup of any wheel at speeds above 10 m.p.h. except for controlled lockup of wheels allowed by an antilock system . . . . In making this change, the agency had in mind the type of antilock system that was designed to permit one wheel on an axle to lock under some circumstances while the other wheels continued to turn. It was thought that adequate control could be attained by such systems, and the standard was amended accordingly. The question you raise is whether a system could be designed in which all wheels could be permitted to lock for substantial periods, so long as they are "controlled" by an antilock system. As you correctly indicate, the term "controlled", unlike "momentary", is not a time-related word. Our answer, therefore, is that such an antilock system would be permitted under the standard as it now stands. It is our present opinion, however, that such a system would probably not provide an acceptable level of performance. If it appears that such a system would be installed, it is likely that we would undertake rulemaking action to prohibit it. |
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ID: GF000573OpenMs. Laurie T. Baulig Dear Ms. Baulig: This is in response to your letter of January 14, 2005, in which you requested a clarification regarding a recent technical amendment to paragraph S6.5(e) of FMVSS No. 119. On January 4, 2005, we published a technical amendment which, in part, revised paragraph S6.5(e) of FMVSS No. 119 (see 70 FR 299). Specifically, the amendment changed the metric value of tire speed restriction threshold from 88 km/h (55 mph) to 90 km/h (55 mph). Prior to the amendment, S6.5(e) of FMVSS No. 119 required that each tire be marked with speed restriction information, if the maximum speed of the tire was 88 km/h (55 mph) or less. Now, S6.5(e) of FMVSS No. 119 requires that each tire be marked with speed restriction information, if the maximum speed of the tire is 90 km/h (55 mph) or less. In both instances, S6.5(e) requires that the actual speed restriction be shown as follows:
The amendment was intended to make FMVSS No. 119 more consistent with established tire industry protocol and labeling technology, and did not substantively change the standard. You ask whether amendment to S6.5(e) requires that each tire manufactured after February 3, 2005 (the effective date of the amendment) be marked with the revised maximum speed restriction of "Max speed 90 km/h (55 mph)," if previously marked "Max speed 88 km/h (55 mph)," Our answer is no. The January 4, 2005 amendment to S6.5(e) of FMVSS No. 119 revised only the threshold below which all tires must be marked with their actual speed restriction (emphasis added). That is, the tire manufacturer could continue marking tires with the speed restriction of "Max speed 88 km/h (55 mph)", if that is the correct speed restriction, or other lower values, when appropriate. I hope you find this information helpful. If you have further questions, you may contact Mr. George Feygin of my staff at (202) 366-2992. Sincerely, Jacqueline Glassman cc Motomu Shinohara ref:119 |
2005 |
ID: GF000843.2Open
Mr. Robert S. Livingston Dear Mr. Livingston: This responds to your January 27, 2005, e-mail regarding lamp, reflex reflector, and conspicuity system requirements for trailers. First, you ask whether the rear side marker lamp, the rear clearance lamp, and the reflex reflector can be combined into a single lighting device so long as it is "visible from both vehicle axes. " Second, you ask whether the retroreflective sheeting located at the rear of the trailer can be combined with the retroreflective sheeting located on the underride guard. You provided a photograph of the prototype vehicle and indicated that its gross vehicle weight rating (GVWR) is over 10,000 pounds. Our answers follow. By way of background, the National Highway Traffic Safety Administration (NHTSA) does not provide approvals of motor vehicles or motor vehicle equipment. Under 49 U.S.C. Chapter 301, manufacturers are required to certify that their vehicles and equipment meet applicable requirements. The Federal standard applicable to lighting equipment on trailers and other motor vehicles is Federal motor vehicle safety standard (FMVSS) No. 108, Lamps, reflective devices, and associated equipment. S5.4 of FMVSS No. 108 permits combining certain items of lighting equipment if the requirements for each item are met. Based on the language of this section, you ask two questions regarding combining lamps, reflex reflectors, and retroreflective sheeting on trailers. Combining Lighting Devices Tables I & II specify that each trailer must be equipped with, among other things:
You ask if these requirements can be met by single lighting devices at each rear corner of the trailer. The photograph accompanying your e-mail shows a lamp and a reflex reflector tilted at a (approximately) 45-degree angle on each rear corner of the trailer. With respect to reflex reflectors, S5.7 of FMVSS No. 108 requires that your trailer be equipped with a conspicuity system. Further, S5.1.1.29 specifies that a trailer equipped with a conspicuity system in conformance with S5.7 need not be equipped with the reflex reflectors required by Table I, if the conspicuity material is placed at the locations required for the Table I reflectors. Thus, if your trailer is equipped with conspicuity material at the appropriate locations specified above, you may omit installing reflex reflectors on this trailer. With respect to side marker and clearance lamps, S5.4 discussed above allows these lamps to be combined, if the photometric requirements for each lamp are met, as installed on the vehicle. SAE Standard J592e "Clearance, Side Marker, and Identification Lamps," July 1972, specifies that both side marker and clearance lamps meet the minimum photometric requirements (expressed in candela) at test points located 45 degrees to the left and right of each lamp. We are familiar with combination lamps that emit a photometric output over 180-degrees wide in order to simultaneously satisfy the photometric requirements for side marker and rear clearance lamps. This is because the angle between the furthest forward test point of the side marker lamp and the furthest inboard test point of the rear clearance lamp is 180-degrees. We examined the photograph of the prototype trailer and question whether your lamp could simultaneously meet the applicable photometric requirements of J592e for both a clearance and side marker lamp because it does not appear to be a combination lamp capable of emitting light over a 180-degree angle. We suggest you contact the lamp manufacturer to determine whether the proposed combination lamp would be capable of complying with all the applicable requirements as installed on your trailer. Combining Retroreflective Sheeting Table I specifies that each trailer must be equipped with, among other things, a conspicuity system meeting the requirements of S5.7 of FMVSS No. 108. In particular, S5.7.1.4.1 requires 3 elements of retroreflective sheeting at the rear of each trailer. Element 1 must be located at the bottom, horizontally across the full width of the trailer. Element 2, consisting of two pairs of white strips of sheeting, must be located horizontally and vertically at the upper contours of the body. Element 3 must be located horizontally across the full width of the rear underride guard. You ask if Element 1 and Element 3 retroreflective sheeting could be combined into one retroreflective sheet located on the underride guard. Our answer is no. S5.4 does not apply to your second question because trailers equipped with underride guards must have separate retroreflective sheeting on the underride guard, and on the rear at the bottom of the trailer. Thus, the retroreflective sheet located on the underride guard cannot satisfy the location requirements for Element 1 retroreflective sheeting, which must be located on the trailer, above the underride guard. Accordingly, your trailer must have Elements 1 and 3 retroreflective sheeting to comply with the requirements of S5.7.1.4.1. We are enclosing Figures 30-1, and 30-2 to clarify this issue. We note that the picture of your prototype trailer appears to be missing Element 2 retroreflective sheeting. Your trailer must also, be equipped with Element 2 retroreflective sheeting. I hope you find this information helpful. If you need further assistance, please contact George Feygin of my staff at this address or at (202) 366-2992. Sincerely, Jacqueline Glassman Enclosure |
2005 |
ID: GF000906OpenMr. Jeff Maharg Dear Mr. Maharg: This responds to your February 5, 2004, e-mail and phone conversation with George Feygin of my staff regarding certain trailer lighting requirements. Specifically, you ask whether a small (5ft. x 8ft.) trailer must be equipped with front side marker lamps. In short, our answer is yes. By way of background, the National Highway Traffic Safety Administration (NHTSA) does not provide approvals of motor vehicles or motor vehicle equipment. Under 49 U.S.C. Chapter 301, manufacturers are required to certify that their vehicles and equipment meet applicable requirements. With respect to your question, Table III of the Federal Motor Vehicle Safety Standard (FMVSS) No. 108 lists required lighting equipment for trailers with an overall width of less than 80 inches. [1] Table III requires that each such trailer be equipped with two red and two amber side marker lamps. Table IV specifies the location of the required lighting listed in Table III. With respect to side marker lamps on trailers, Table IV mandates that one red side marker be located as far to the rear as practicable, and one amber side marker be located as far to the front as practicable, on each side of the trailer. Accordingly, your trailer must be equipped with two amber side marker lamps located on each side of the trailer as far to the front as practicable. From the attached pictures of your trailer, it is unclear whether it is equipped with rear red side marker lamps. Further, the front amber side markers do not appear to be located "as far to the front as practicable." Finally, we note that your trailer must also be equipped with red and amber reflex reflectors that are either incorporated into side marker lamps or located adjacent to the side marker lamps. The amber reflex reflector that appears to be mounted on the wheel cover does not satisfy this requirement. In order to satisfy FMVSS No. 108, you must install all required lighting in the correct location. I hope you find this information helpful. If you need further assistance, please contact George Feygin of my staff at this address or at (202) 366-2992. Sincerely, Jacqueline Glassman ref:108
[1] Your e-mail and attached photos indicate that your trailer width is approximately 5 ft (60 inches).
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2004 |
ID: GF001032OpenMr. John A. Labalestra 1712 Tatum Street Saint Paul , MN 55113 Dear Mr. Labalestra: This responds to your letter concerning a device which you intend to market for installation on motor vehicles. You requested a ruling on my business project. As explained below, we do not provide rulings or approvals of motor vehicles or motor vehicle equipment. Instead, this letter will explain which Federal statutes and regulations may apply to your device. By way of background, the National Highway Traffic Safety Administration (NHTSA) issues Federal motor vehicle safety standards (FMVSSs) that set performance requirements for new motor vehicles and certain items of motor vehicle equipment. However, NHTSA does not provide approvals of motor vehicles or motor vehicle equipment. Instead, it is the responsibility of manufacturers to certify that their products conform to all applicable safety standards before they can be offered for sale. NHTSA enforces compliance with the standards by purchasing and testing vehicles and equipment, and we also investigate safety-related defects. While you did not provide a detailed description of your device, we understand that it consists of a hi-resolution camera attached in the upper right hand portion of the windshield. The camera is connected to a monitor installed in the vehicle instrument panel (akin to monitors used in vehicles equipped with navigation systems). The purpose of the device is to provide an enhanced image of the road ahead and its immediate surroundings. NHTSA has not issued any FMVSSs establishing performance standards directly applicable to your product. However, installation of your device may affect a vehicles compliance with several safety standards. If the device is installed as original equipment on a new vehicle, the vehicle manufacturer is required to certify that, with the device installed, the vehicle satisfies the requirements of all applicable FMVSSs. If the device is added to a previously certified new motor vehicle, prior to its first sale, the person who modifies the vehicle would be an alterer of a previously certified motor vehicle and would be required to certify that, as altered, the vehicle continues to comply with all of the safety standards affected by the alteration (see 49 CFR Part 567, Certification). If your device is installed on a used vehicle by a manufacturer, distributor, dealer, or vehicle repair business, the entity would not be required to recertify the vehicle, but could not knowingly "make inoperative" any device or element of design installed on or in a motor vehicle in accordance with any FMVSS (see 49 U.S.C. 30122). In order to determine how installation of your product could affect compliance with applicable Federal safety standards, you should carefully review each FMVSS (available online at: http://ecfr.gpoaccess.gov/). However, there are two standards of which you should be particularly aware. First, we note that S5.3.5 of FMVSS No. 101, Controls and displays, specifies operational requirements on sources of illumination within the passenger compartment in order to prevent glare visible to the driver. Although your letter does not indicate the type of output associated with your device, any monitor or display is required to control glare. Second, you should assess your products effect upon a vehicles compliance with FMVSS No. 201, Occupant protection in interior impact, which establishes performance requirements designed to reduce the risk of injury in the event an occupant strikes the interior of the vehicle during a crash. We also note that beyond compliance with relevant federal safety standards, motor vehicle accessories are items of motor vehicle equipment subject to the notification and remedy (recall) provisions of 49 U.S.C. 30118-30120. If a manufacturer or NHTSA determines that the product contains a safety-related defect, the manufacturer is responsible for notifying purchasers of the product and remedying the problem free of charge. Finally, you should be aware that States have the authority to regulate the use and licensing of vehicles operating within their jurisdictions. Therefore, you may wish to check with the Department of Motor Vehicles in any State where you plan to sell your device. If you need further assistance, please contact J. Edward Glancy of my staff at this address or at (202) 366-2992. Sincerely, Stephen P. Wood Acting Chief Counsel ref:201 d.6/23/06 |
2006 |
ID: GF001069OpenMichael Price, Project Manager Dear Mr. Price: This responds to your February 10, 2004, e-mail and subsequent phone communications with George Feygin of my staff, regarding certain U.S. Military Trailers that are being shipped to the United States from Europe for repairs. Specifically, you ask whether these trailers must comply with applicable Federal motor vehicle safety standards (FMVSSs) while they are in transit on U.S. highways from the seaport of entry to the repair facility in Cincinnati Ohio, and back to the seaport. By way of background, the National Highway Traffic Safety Administration (NHTSA) administers Federal requirements for the manufacture and sale of new motor vehicles and certain items of motor vehicle equipment. NHTSA issues FMVSS applicable to new vehicles and equipment (49 CFR Part 571). Chapter 301 of Title 49 of the United States Code, "Motor Vehicle Safety" (49 U.S.C. 30101 et seq.), establishes a certification process under which each manufacturer is responsible for certifying that its products meet all applicable FMVSS. 49 CFR 571.7(c) provides that "no standard applies to a vehicle or item of equipment manufactured for, and sold directly to, the Armed Forces of the United States in conformity with contractual specifications." [Emphasis added] In the present case, youve indicated that the trailers were designed and manufactured as military command posts and sold directly to the military in conformance with specific contractual specifications. Accordingly, the trailers in question are exempt from applicable Federal motor vehicle safety standards. Even if the trailers were not manufactured for, and sold directly to the military, they could be operated on public roads in the United States without being brought into conformity with all applicable FMVSS. While 49 U.S.C. 30112(a) prohibits the introduction into interstate commerce of a motor vehicle that does not conform to all applicable FMVSS, Section 30112(b)(3) exempts from this prohibition "a motor vehicle intended only for export, labeled for export on the vehicle . . . and on the outside or any container or the vehicle . . . and exported." Accordingly, so long as the trailers are labeled "for export only," they could be operated on U.S. roads from the seaport to the repair facility and back without having to be brought into compliance with all applicable FMVSS. I hope this information is helpful. If you need further assistance, please contact George Feygin of my staff at this address or at (202) 366-2992. Sincerely, Jacqueline Glassman ref:224 |
2004 |
ID: GF001071OpenMr. David Regan Dear Mr. Regan: This responds to your February 10, 2004, letter and phone conversation with George Feygin of my staff. You ask whether snow melting machines manufactured by your company would be classified as "motor vehicles." You manufacture three different machines with the primary function of melting large quantities of snow. In order to move from location to location, these machines are equipped with wheels and function much like a trailer. As explained below, based on the information you provided us, we would not consider these machines to be motor vehicles for the purposes of our regulations. Title 49 U.S.C Chapter 301 authorizes the National Highway Traffic Safety Administration (NHTSA) to prescribe Federal motor vehicle safety standards (FMVSSs) applicable to new motor vehicles and new items of motor vehicle equipment. Section 30102(a)(6) defines "motor vehicle" as:
NHTSA has issued several interpretations of this language. We have stated that vehicles equipped with tracks, agricultural equipment, and other vehicles incapable of highway travel are not motor vehicles. We have also determined that certain vehicles designed and sold solely for off-road use (e.g., airport runway vehicles and underground mining vehicles) are not motor vehicles, even if they may be operationally capable of highway travel. Finally, we have concluded that items of mobile construction equipment that use the highways only to move between job sites and that typically spend extended periods of time at a single site are not motor vehicles. However, we do consider vehicles that use the public roads on a necessary and recurring basis to be motor vehicles. In the present case, your letter states that your snow melting machines are designed primarily for use by airports and other large facilities, such as parking garages. While these machines are capable of highways travel, you state that in all likelihood such travel will be limited to reaching permanent or semi-permanent job sites (i.e specific locations where large snow piles are continuously accumulated). Based on this information, it appears that these machines are akin to airport runway vehicles or items of mobile construction equipment that do not travel on highways on a recurring basis. Accordingly, we find that the snow melting machines described in your letter are not "motor vehicles." Because these machines are not motor vehicles, they are not subject to our regulations and requirements, including the requirement to meet all applicable FMVSSs. We note that our finding is limited specifically to the equipment described in your letter, and is largely based on your representation of its intended use. In your correspondence, you state that some snow melting machines may be sold to large cities, but you do not elaborate further. We presume that snow melting machines purchased by large cities would also remain mostly at some single location designated for snow melting activities. However, we wish to caution that our finding does not apply to snow melting equipment that is intended to be used extensively on public roads on a recurring basis. I hope you find this information helpful. If you have any other questions please contact Mr. George Feygin at (202) 366-2992. Sincerely, Jacqueline Glassman ref:571 |
2004 |
ID: GF001563aOpenMr. Ian James Dear Mr. James: This responds to your January 5, 2004, letter, as well as e-mail and phone communications with George Feygin of my staff, concerning the National Highway Traffic Safety Administrations (NHTSAs) Federal motor vehicle theft prevention standard, 49 CFR Part 541 (Part 541). You ask if glazing is considered a part of the door for the purposes of the standards parts marking requirements. You also ask whether parts marking can be applied to vehicles at the point of export, as opposed to the point of manufacture. We note that you originally wrote intending to comment on our June 26, 2002, notice of proposed rulemaking (NPRM) that proposed revisions to the theft prevention standard (67 FR 43075). As Mr. Feygin informed you, the comment period for the NPRM closed on August 26, 2002. Nonetheless, because the issues you raise are primarily requests for interpretation of the standard, we can address them in this letter. By way of background, the purpose of Part 541 is to reduce the incidence of motor vehicle thefts by facilitating the tracing and recovery of parts from stolen vehicles. The standard requires identifying numbers or symbols (usually Vehicle Identification Numbers, see 49 CFR Part 565) to be placed on major parts of certain passenger motor vehicles. 49 CFR 541.5 lists 18 "major parts" subject to the parts marking requirements. Front and rear doors are included in this list. With respect to your first question, the agency does not consider window glazing that is mounted in and framed by a metal or fiberglass door structure to be a part of the "door" for the purposes of the parts marking requirements. Instead, under Part 541, the "door" is limited to the actual door structure. Glazing is designed and manufactured from a combination of glass and plastic, materials that are significantly different from metal and fiberglass normally used in manufacturing the "major parts" listed in 541.5. In inventory lists, manufacturers typically designate window glazing as a separate part from the metal doorframe. Glazing is also considerably more fragile than the major parts in 541.5, which makes it vulnerable to damage in a collision, and can be replaced relatively easily in a door. For these reasons, we do not consider marking the window glazing to meet 541.5s requirement to permanently mark the vehicles doors. With respect to your second question, Part 541 does not require that parts marking be applied at the point of manufacture. However, a vehicle certified by the manufacturer to meet U.S. safety, bumper, and theft prevention standards must be marked prior to the delivery to dealer or distributor for the certification to be valid (49 U.S.C. 30115). Thus, the standard does not prohibit application of parts marking at the point of export so long as it is done prior to the delivery to distributor or dealer. I hope you find this information helpful. If you have any other questions, please contact Mr. Feygin at this address or by phone at (202) 366-2992. Sincerely, Jacqueline Glassman ref:541 |
2004 |
ID: GF001689OpenMr. Kenneth Reed Dear Mr. Reed: This responds to your letter asking about S4.2.2(a) of Standard No. 114, Theft Protection, in connection with Jaguars "pass key technology." The issues raised by your letter are addressed below. By way of background, the National Highway Traffic Safety Administration (NHTSA) does not provide approvals of motor vehicles or motor vehicle equipment. Under 49 U.S.C. Chapter 301, manufacturers are required to certify that their vehicles and equipment meet applicable requirements. The following represents our opinion based on the facts you provided in your letter. Under S4.2.1 of Standard No. 114, the key-locking system in vehicles that have an automatic transmission with a "park" position, when tested under specified procedures, must generally prevent removal of the key unless the transmission or transmission shift lever is locked in "park" or becomes locked in "park" as the direct result of removing the key. S4.2.2(a) states (in relevant part) that notwithstanding S4.2.1, provided that steering is prevented upon the key's removal, each vehicle specified therein may permit key removal when electrical failure of the system (including battery discharge) occurs. You asked how S4.2.2(a) applies to key-locking systems using "pass key technology," i.e., systems using electronically coded cards or other means to enter an electronic key code into the locking system. In past interpretation letters, we have stated that the electronic code itself can be considered the key. You noted that in situations of sudden and complete loss of electrical power, the electronic key code could be immediately erased from the vehicles volatile memory, before a vehicle could be stopped. In considering your question, we believe it is helpful to note the history of the provision at issue. On January 17, 1992, we published in the Federal Register (57 FR 2039) a notice responding to petitions for reconsideration of amendments to Standard No. 114. Honda and Toyota, asking about key-locking systems using conventional keys, asked that the standard make it clear that key removal was permitted in the circumstance of electrical failure when the vehicle's transmission was not in park.
As explained in that notice, however, the agency decided to resolve the issue raised by Honda and Toyota by making it clear in the text of the standard that key removal is permitted in the circumstance of electrical failure when the vehicle's transmission is not in park. To implement this decision, the agency adopted the language of S4.2.2(a) discussed earlier; i.e., specifying that "(n)otwithstanding S4.2.1, provided that steering is prevented upon the key's removal, each vehicle specified therein may permit key removal when electrical failure of the system (including battery discharge) occurs . . . ." In considering the issues raised by your letter, it is our interpretation that the narrow provisions related to electrical failure do not apply to pass key technology where electronically coded cards or other means are used to enter an electronic key code into the locking system. These provisions were specifically crafted in the context of addressing whether (and under what circumstances) traditional keys should be permitted to be removed after battery discharge occurs, whereas, in the case of "pass key technology," electrical failure can automatically result in the immediate removal of the electronic key code. Moreover, the clause provided that steering is prevented upon the key's removal would not be appropriate in situations where sudden and complete loss of electrical power could result in immediate erasure of the electronic key code before a vehicle could be stopped, since paragraph S4.3 requires that steering be maintained in that situation. I hope this information is helpful. If you need further assistance, please contact George Feygin of my staff at this address or at (202) 366-2992. Sincerely, Jacqueline Glassman Enclosure |
2003 |
ID: GF001832OpenMr. E. Paul Daniels Dear Mr. Daniels: This responds to your letter dated January 26, 2005, asking whether S6.4 of Federal Motor Vehicle Safety Standard (FMVSS) No. 119 permits a motorcycle tire treadwear indicator height of greater that 0.8 mm.You asked about the possibility of raising it by as much as 0.6 mm, i.e., to 1.4 mm on new molds. By way of background, the National Highway Traffic Safety Administration (NHTSA) does not provide approvals of motor vehicles or motor vehicle equipment. Under 49 U.S.C. Chapter 301, manufacturers are required to certify that their vehicles and equipment meet applicable requirements. The Federal standard applicable to your question is FMVSS No. 119, New pneumatic tires for vehicles other than passenger cars.The relevant portion of that standard reads as follows:
The treadwear indicator requirement in S6.4 sets forth a specific standardized treadwear indicator height.A higher treadwear indicator is not permitted.We note that if the treadwear indicator height were raised to 1.4 mm, consumers would not be able to visually determine when the tire wore to a depth of 0.8 mm. We further note that in a document published on January 30, 1996, the agency denied a petition for rulemaking from Herzlich Consulting, Inc. to increase the treadwear indicator height requirement for passenger car tires (see 61 FR 2991).The agency explained that the treadwear indicator height limit was based on a long-standing industry practice, and that NHTSA adopted this industry practice. I hope you find this information helpful.If you need further assistance, please contact George Feygin of my staff at this address or at (202) 366-2992. Sincerely, Jacqueline Glassman ref:119 |
2005 |
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.