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: aiam3312OpenMichael M. Packard, Commissioner, Indiana Bureau of Motor Vehicles, State Office Building, Indianapolis, IN 46204; Michael M. Packard Commissioner Indiana Bureau of Motor Vehicles State Office Building Indianapolis IN 46204; Dear Mr. Packard: This is in response to your letter of May 28, 1980, in which yo requested approval to use Indiana's Certificate of Title as a substitute for the Federal Odometer disclosure form required by 49 CFR Part 580.; Because the Federal odometer requirements that became effective as o January 1, 1978, contain a good deal of wish to include odometer information on their titles to use a shortened form that was adopted by the American Association of Motor Vehicle Administrators (AAMVA). We consider the AAMVA form to include the minimum amount of information necessary for an adequate disclosure. In addition to the information included on the Certificate of Title which you submitted to our office, the following information is also required:; >>>(1) a reference to State or Federal law, (2) a statement that the odometer reading reflects the amount o mileage over 99,999 miles,; (3) a statement that the odometer mileage is not actual, (4) the signature of the buyer.<<< Without these four items the title cannot be used in lieu of a separat Federal form. If this information is included, the National Highway Traffic Safety Administration will approve the title for use in lieu of the Federal form.; Sincerely, Frank Berndt, Chief Counsel |
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ID: 2796oOpen Mr. Scott A. Snyder Dear Mr. Snyder: This is in reply to your letter of March l0, l988, to the Department's regional office in Philadelphia, asking for a response concerning "ornamental lighting." In your opinion "a few extra lights on the side and rear of a vehicle would help other people see you better while driving at night." The agency is interested in the role that vehicle conspicuity plays in accidents and accident avoidance. With reference to motorcycles, we have amended our motor vehicle lighting standard to prescribe performance characteristics for headlamp modulation. We were prepared to amend the standard to require the activation of motorcycle headlamps when the ignition was turned on (but did not do so when we learned that almost all motorcycles were being wired to operate in that fashion). Some time ago we asked the public to comment on ways of increasing the conspicuity of large vehicles as our research had indicated that reflective tape applied to the side and rear of wide trucks and trailers might lessen crashes and crash severity, and our research still continues in this area. Most importantly we adopted the center highmounted stop lamp for passenger cars because of the ability it demonstrated in test fleets to reduce the frequency of rear end impacts. The type of lights of which you speak are referred to as "presence" lamps (as contrasted with "signal" lamps), and the agency over the years has acted with respect to all motor vehicles by requiring them to be equipped with side marker lamps, and by increasing the lens area for stop lamps. As the Federal safety standards are by statutory definition "minimum" safety standards, the requirement that there be two taillamps, for example, does not mean that a manufacturer may not add two more if it wishes, or any lighting device not covered by the standard. The sole restriction is that lighting devices added by the manufacturer or dealer that are in excess of the minimum must not impair the effectiveness of the equipment required by the standard. This could happen, for example, if a fog lamp (not covered by the standard) was of an intensity and located so that it masked an adjacent front turn signal. With respect to nighttime operation, the critical issue would appear to be that additional lighting devices not create glare to oncoming and following drivers. The owner of the vehicle is not under a similar Federal restriction, and may personally add such additional lighting devices as seems desirable, subject to the laws of the States where the vehicle is registered and/or driven. However, the owner may not have these devices installed by a motor vehicle dealer or repair business if the result is to render wholly or partially inoperative any of the vehicle's original lamps or reflectors. We appreciate your suggestion for improving motor vehicle safety. Sincerely,
Erika Z. Jones Chief Counsel ref:l08 d:8/ll/88 |
1970 |
ID: 22525.ztvOpenMr. Harold Holeman Dear Mr. Holeman: This is in reply to your email of December 26, 2000, asking for interpretations of Federal Motor Vehicle Safety Standard No. 108, "Lamps, Reflective Devices and Associated Equipment." Your first question is whether "the standards as set forth in FMVSS 108 require that bumper bras or bumper masks have openings around the running lights, parking lights, turning signals, etc.?" Standard No. 108 does not regulate bumper bras or masks per se. However, lighting equipment is required under Federal law to comply with all requirements of Standard No. 108 when accessory equipment such as bumper bras are installed by regulated persons, whether the equipment is installed as original equipment or aftermarket equipment. The one exception under Federal law is a bra or mask installed by the vehicle owner; if this creates a noncompliance with Standard No. 108, the owner is responsible under any applicable local laws rather than Federal law. Your next question is "If the bra material is transparent and does not noticeably diminish the luminescence of the lights is the bra design within code without having cutouts for the lights?" Paragraph S7.8.5 prohibits "any styling ornament or other feature, such as a translucent cover or grille, in front of the lens" when the headlamps are activated. We view a transparent bra as an "other feature" and prohibited by Standard No. 108. Thus, a transparent bra could not be installed by a regulated person (i.e., manufacturer, distributor, dealer, or motor vehicle repair business) without violating Standard No. 108, but could be installed by the vehicle owner, provided that it does not violate local laws. You then ask "Is there a test that should or can be performed to show that the intensity of the running lights is adequate even when covered by the bumper bra?" The photometric tests for each of the lamps covered by Standard No. 108 are essentially those of the Society of Automotive Engineers, which have been incorporated by reference in Standard No. 108. These are laboratory tests rather than tests conducted on the vehicle itself. They could be conducted with the transparent bra or mask material cut to fit the lens. Any diminution in light output must not result in photometric output falling below the minimum levels specified for test points in any individual standard. Like you, we are not aware of any transparent bra or mask on the market. In general, we do not favor covering the lens of any lamp with other material. Dirt and grime may accumulate to the point that candela is reduced below the minimum specified in the standard. Further, it may not be easily removable by washing the cover. Sincerely, John Womack ref:108 |
2001 |
ID: nht88-2.97OpenTYPE: INTERPRETATION-NHTSA DATE: 08/11/88 EST FROM: ERIKA Z. JONES -- CHIEF COUNSEL, NHTSA TO: SCOTT A. SNYDER TITLE: NONE ATTACHMT: MEMO DATED 3-10-88 TO NHTSA FROM SCOTT A. SNYDER TEXT: This is in reply to your letter of March 10, 1988, to the Department's regional office in Philadelphia, asking for a response concerning "ornamental lighting." In your opinion "a few extra lights on the side and rear of a vehicle would help other people see you better while driving at night." The agency is interested in the role that vehicle conspicuity plays in accidents and accident avoidance. With reference to motorcycles, we have amended our motor vehicle lighting standard to prescribe performance characteristics for headlamp modulation. We were prepared to amend the standard to require the activation of motorcycle headlamps when the ignition was turned on (but did not do so when we learned that almost all motorcycles were being wired to operate in that fashion). Some time ago we aske d the public to comment on ways of increasing the conspicuity of large vehicles as our research had indicated that reflective tape applied to the side and rear of wide trucks and trailers might lessen crashes and crash severity, and our research still co ntinues in this area. Most importantly we adopted the center highmounted stop lamp for passenger cars because of the ability it demonstrated in test fleets to reduce the frequency of rear end impacts. The type of lights of which you speak are referred to as "presence" lamps (as contrasted with "signal" lamps), and the agency over the years has acted with respect to all motor vehicles by requiring them to be equipped with side marker lamps, and by incr easing the lens area for stop lamps. As the Federal safety standards are by statutory definition "minimum" safety standards, the requirement that there be two taillamps, for example, does not mean that a manufacturer may not add two more if it wishes, o r any lighting device not covered by the standard. The sole restriction is that lighting devices added by the manufacturer or dealer that are in excess of the minimum must not impair the effectiveness of the equipment required by the standard. This cou ld happen, for example, if a fog lamp (not covered by the standard) was of an intensity and located so that it masked an adjacent front turn signal. With respect to nighttime operation, the critical issue would appear to be that additional lighting devi ces not create glare to oncoming and following drivers. The owner of the vehicle is not under a similar Federal restriction, and may personally add such additional lighting devices as seems desirable, subject to the laws of the States where the vehicle is registered and/or driven. However, the owner may not have these devices installed by a motor vehicle dealer or repair business if the result is to render wholly or partially inoperative any of the vehicle's original lamps or reflectors. We appreciate your suggestion for improving motor vehicle safety. |
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ID: nht80-3.15OpenDATE: 07/07/80 FROM: AUTHOR UNAVAILABLE; F. Berndt; NHTSA TO: BMW of North America, Inc. TITLE: FMVSS INTERPRETATION TEXT: This is in reply to your letter of June 9, 1980, asking for an interpretation of Federal Motor Vehicle Safety Standard No. 108 with respect to the spacing required between headlamps and turn signal lamps on motorcycles. You cited Table IV of Standard No. 108 which requires that the "minimum edge to edge separation distance between [turn signal] lamp and [headlamp] is 4 inches." You also cited paragraph 4.2 of the referenced SAE standard on turn signal lamps, J588e, which mandates that "the optical axis (filament center) of the front turn signal shall be at least 4 inches from the inside diameter of the retaining ring of the headlamp unit providing the lower beam." Finally, you have cited an agency interpretation of November 5, 1979, to Bajaj Auto Limited as support that the provisions of 4.2 prevail, and you asked for confirmation of this opinion. The Bajaj letter does not provide the support you seek. The interpretation it provides is that the separation distance must be not less than the minimum under all motorcycle operating conditions. We view Table IV as controlling in this instance as it contains a specific locational requirement for motorcycles. Since that specific requirement is lacking in Table IV for other motor vehicle, paragraph 4.2 of J588e would then apply with respect to separation distance for lamps on passenger cars, trucks, buses, and multipurpose passenger vehicles. SINCERELY, BMW OF NORTH AMERICA, INC. June 9, 1980 Chief Counsel National Highway Traffic Safety Administration U.S. Department of Transportation RE: Request for Interpretation FMVSS 108, Lamps, Reflective Devices, and Associated Equipment Dear Sir We request interpretation of the interlamp spacing requirements specified for motorcycles in Table IV of FMVSS 108. A four-inch spacing is required between turn signal lamps and the edge of the headlamp in front, and between turn signal lamps in the rear. However, while subject table uses the words, "edge to edge", SAE J588e, referenced in Table III, specifies measuring turn signal distance from the filament center. Acceptance of the filament center of a turn signal lamp as the measuring point is underscored by your letter of November 5, 1979 to Mr. Keshav of Bajaj Auto Limited. A closely related question concerns the method of measurement, i.e., whether the required four-inch separation dimension is a physical measurement between lamps or a distance between lamp projections. This is questioned because the measurement method is not specified in Table IV, and because S4.3.1.1 of the standard, and section 4.3 of SAE J588e otherwise require unobstructed photometric compliance. In view of the above, we interpret the standard to mean that the four-inch dimension is a physical measurement to a turn signal's filament. We would appreciate receiving your interpretation as soon as convenient. Karl-Heinz Ziwica, Manager Safety & Emission Control Engineering |
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ID: nht94-3.47OpenTYPE: INTERPRETATION-NHTSA DATE: June 28, 1994 FROM: William R. Willen -- Managing Counsel, American Honda Motor Co., Inc. TO: Administrator -- NHTSA TITLE: Petition for Honda Electric Vehicles in Accordance with FMVSS @ 555.6(c) ATTACHMT: Attachment dated 7/25/94: Letter from John Womack to William Willen (Part 555 & 591) TEXT: This petition is being sought by American Honda Motor Co., Inc., 1919 Torrance Blvd, Torrance, CA, 90501, a California corporation, hereinafter referred to as "Honda." Honda plans to field test no more than twenty (20) electric vehicles ("HONDA-EV") over a three (3) year period, in order to gather field information. These HONDA-EV's will not be sold, however; they will be driven by various drivers, including, but not limited to: electric utilities, media Honda employees, commercial fleet drivers and, po ssibly, consumers. The field test is necessary to obtain "real world" usage patterns as well as overall field experience with electric vehicles. The technical and qualitative feedback from these field tests will enable Honda to develop and market a bet ter electric vehicle. In accordance with FMVSS @ 555.6(c), the basis for this petition includes: "the development or field evaluation of a low-emission motor vehicle." The HONDA-EV for which Honda seeks an exemption meets all applicable regulations except the following FMVSS standards: FMVSS Description Impact 103 As described in Attachment 1, a Operator instructions will make limited area on each side of clear the need to wait until the the windshield is only 87.5% clear, front glass is adequately compared to a standard of 95% defrosted prior to vehicle operation. The vehicles will clear, within the specified 40 be minute start period. This is operated mainly in California primarily due to the electrical where the milder weather should consumption requirements. minimize this concern. Additionally, vehicle parking is primarily indoors due to recharging requirements, where defrosting is even less of a concern. While these eight components do 302 PP plastic was used for several not prototype parts in order to meet the standard, all other minimize the tooling costs needed vehicle components do meet the to produce these few vehicles. PP standard, and the overall risk does not meet the fire-retardant of fire is not significantly increased. Additionally, the standard set forth in 302. risk of fuel-fed fire is greatly These components are described reduced in Attachment 2, and include: since there is no on-board gasoline or diesel fuel with Cover, Right Front Door; Cover, which Left Front Door; Console, Front; to contend. Lining, Rear Panel; Lining, Right Side, Lining, Left Side; Lining, Right Cowl Side; Lining, Left Cowl Side These minor "non-compliances" will have no significant adverse affect on vehicle safety. By providing this temporary exemption, field testing and evaluation will proceed rapidly. In addition, the full production version of this vehicle, currently scheduled for the 1998 model year, is planned to fully meet all FMVSS requirements, including t he above standards. Enclosed: Attachment 1 (1 page) Attachment 2 (6 pages) |
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ID: nht94-8.46OpenDATE: January 21, 1994 FROM: John Womack -- Acting Chief Counsel, NHTSA TO: Terry Karas -- T. K. Auto Inc. TITLE: None ATTACHMT: Attached to letter dated 11/5/93 from Terry Karas to John Womack TEXT: This responds to your FAX of November 5, 1993. You have asked whether a Canadian car that was accompanied by a Canadian manufacturer's letter stating that the vehicle complies with U.S. safety standards can be imported as a conforming vehicle under Box 2. Box 2 on the HS-7 importation form is the importer's declaration under 49 CFR 591.5(b) that the motor vehicle to be imported complies with all applicable U.S. Federal motor vehicle safety standards, and bears a certification label or tag to that effect, affixed by the original manufacturer of the vehicle. Because some Canadian vehicles may be virtually identical to those manufactured in the United States, and hence may comply with U.S. safety standards even if not bearing a specific certification to U.S. safety standards, the National Highway Traffic Safety Administration has accepted, in lieu of specific certification to U.S. safety standards, a letter from the Canadian manufacturer stating that the vehicle to be imported was manufactured to comply with the U.S. safety standards. If a manufacturer's compliance letter accompanies a vehicle manufactured for sale in Canada at the time such vehicle is offered for importation into the United States, the vehicle may be entered under Box 2 as a conforming vehicle, without the intervention of a registered importer or the issuance of a bond. However, the manufacturer's compliance letter must contain the VIN of the specific vehicle that is to be imported, and an unqualified statement that the vehicle, as manufactured, complied with all applicable U.S. Federal motor vehicle safety standards. Customs will then forward the HS-7 form and manufacturer's letter to this agency. However, if customs wishes us to review the manufacturer's letter, it is the prerogative of Customs to defer entry of the vehicle until it has received our views as to whether entry under Box 2 is appropriate. You have also asked whether it makes "a difference if it is being imported for commercial or private purposes." Any Canadian vehicle that is accompanied by an acceptable manufacturer's letter of compliance is eligible for entry as a conforming vehicle under Box 2, regardless of whether the intent of importation is the commercial sale of the vehicle, or the retention of the vehicle for private use. However, if the letter is not an acceptable statement of compliance and the importation is for commercial purposes, the vehicle may only be imported under bond by a registered importer who must satisfy NHTSA that the vehicle complies, or has been brought into compliance, with the U.S. safety standards. Even though the registered importer's compliance work may be minimal, it is important to remember that the registered importer is also the person responsible by statute for implementing notification and remedy campaigns in the event that noncompliances of the original manufacturer or safety related defects are discovered in the Canadian vehicle. |
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ID: nht93-8.14OpenDATE: November 16, 1993 FROM: John Womack -- Acting Chief Counsel, NHTSA TO: Ray Paradis -- Manufacturing Manager, Dakota Mfg. Co., Inc. TITLE: None ATTACHMT: Attached to letter dated 8/31/93 from Ray Paradis to Pat Boyd (OCC-9151) TEXT: This responds to your letter of August 31, 1993, to Pat Boyd of this agency with respect to the trailer conspicuity requirements of Federal Motor Vehicle Safety Standard No. 108. You have enclosed literature and photos of several of your trailers, and ask for our comments in several areas. Your first remark is "Deck heights are from 22" to 39 1/2"." We understand this to ask whether these are acceptable heights for mounting conspicuity treatments. Standard No. 108 was amended on October 6, 1993, to specify a mounting range as close to 375 to 1525 mm as practicable, i.e. approximately 15 to 60 inches. Your "deck heights" are within this range. Your second remark is "(t)he rear design does not allow for continuous tape all models." Standard No. 108 requires a horizontal strip of retroreflective sheeting across the full width of the trailer. Paragraph S5.7.1.3(b) anticipates that the length of the color segments may have to be modified to facilitate using material near rear lamps. In the worst cases of trailers with rear surfaces no wider than the minimum required for lamps, breaks in the rear treatment are unavoidable to clear the lamps. But NHTSA expects the manufacturer to minimize the breaks by using red material adjacent to red lamps. Your third remark is (t)he side extension model has fold-up sides #2." We understand this to ask whether striping must be applied so as to be visible only when the extension is folded, or whether striping must also be visible when the extension is in use, i.e., whether striping must be applied to both surfaces of the extension so that it is visible regardless of the position of the extension. Although Standard No. 108 does not directly address this question, we believe that motor vehicle safety requires visibility of conspicuity treatment at all times. The standard does require that striping not be obscured by other motor vehicle equipment or trailer cargo, reflecting the agency's intent that striping be visible when the trailer is performing its intended work-related functions. This means that side extension model trailers should be equipped with conspicuity treatment that is visible both when the extensions are folded and unfolded. Your final remark is "((d)oes the front require any stripe." Under the assumption that you refer to the front side of a trailer and not the front that is hidden behind the towing vehicle, the answer is yes. Standard No. 108, in pertinent part, requires conspicuity treatment to be applied as close to the front of a trailer as practicable. Goosenecks and tongues are part of the trailer front and are portions of a trailer requiring conspicuity treatment if practicable. I hope that this answers your questions. |
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ID: nht94-1.22OpenTYPE: Interpretation-NHTSA DATE: January 21, 1994 FROM: John Womack -- Acting Chief Counsel, NHTSA TO: Terry Karas -- T. K. Auto Inc. TITLE: None ATTACHMT: Attached to letter dated 11/5/93 from Terry Karas to John Womack TEXT: This responds to your FAX of November 5, 1993. You have asked whether a Canadian car that was accompanied by a Canadian manufacturer's letter stating that the vehicle complies with U.S. safety standards can be imported as a conforming vehicle under Box 2. Box 2 on the HS-7 importation form is the importer's declaration under 49 CFR 591.5(b) that the motor vehicle to be imported complies with all applicable U.S. Federal motor vehicle safety standards, and bears a certification label or tag to that effect, affixed by the original manufacturer of the vehicle. Because some Canadian vehicles may be virtually identical to those manufactured in the United States, and hence may comply with U.S. safety standards even if not bearing a specific certification to U. S. safety standards, the National Highway Traffic Safety Administration has accepted, in lieu of specific certification to U.S. safety standards, a letter from the Canadian manufacturer stating that the vehicle to be imported was manufactured to comply w ith the U.S. safety standards. If a manufacturer's compliance letter accompanies a vehicle manufactured for sale in Canada at the time such vehicle is offered for importation into the United States, the vehicle may be entered under Box 2 as a conforming vehicle, without the interventi on of a registered importer or the issuance of a bond. However, the manufacturer's compliance letter must contain the VIN of the specific vehicle that is to be imported, and an unqualified statement that the vehicle, as manufactured, complied with all a pplicable U.S. Federal motor vehicle safety standards. Customs will then forward the HS-7 form and manufacturer's letter to this agency. However, if customs wishes us to review the manufacturer's letter, it is the prerogative of Customs to defer entry of the vehicle until it has received our views as to whe ther entry under Box 2 is appropriate. You have also asked whether it makes "a difference if it is being imported for commercial or private purposes." Any Canadian vehicle that is accompanied by an acceptable manufacturer's letter of compliance is eligible for entry as a conforming vehicle u nder Box 2, regardless of whether the intent of importation is the commercial sale of the vehicle, or the retention of the vehicle for private use. However, if the letter is not an acceptable statement of compliance and the importation is for commercial purposes, the vehicle may only be imported under bond by a registered importer who must satisfy NHTSA that the vehicle complies, or has been brought into compliance, with the U.S. safety standards. Even though the registered importer's compliance work may be minimal, it is important to remember that the registered importer is also the person responsible by statute for implementing notification and remedy campaigns in the event that noncompliances of the original manufacturer or safety related defects are discovered in the Canadian vehicle. |
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ID: nht75-5.10OpenDATE: 05/30/75 FROM: AUTHOR UNAVAILABLE; Richard B. Dyson; NHTSA TO: Bock & Jones TITLE: FMVSR INTERPRETATION TEXT: This is in response to your letter of May 2, 1975, inquiring about the existence of regulations governing the manufacture, design, and on-the-road operation of trailers used to transport fertilizer while hitched to a pickup truck. The National Highway Traffic Safety Administration has the responsibility of promulgating safety standards that set minimum performance requirements for vehicles manufactured and/or sold in the United States. There are five motor vehicle safety standards that apply to trailers. These standards relate to trailer lighting, tires, and braking systems (Standard No. 106-74, Brake Hoses (49 CFR Part 571.106), Standard No. 108, Lamps, Reflective Devices and Associated Equipment (49 CFR Part 571.108), Standard No. 116, Motor Vehicle Brake Fluids (49 CFR Part 571.116), Standard No. 119, New Pneumatic Tires for Vehicles Other Than Passenger Cars (49 CFR Part 571.119), Standard No. 121, Air Brake Systems (49 CFR Part 571.121)). There is no safety standard that applies to the towing of a trailer. The use of a safety chain to guard against release of the trailer may, however, be mandated by State law. Yours truly, ATTACH. BOCK & JONES -- ATTORNEYS AT LAW May 2, 1975 CERTIFIED MAIL -- RETURNED RECEIPT REQUESTED #466442 Legal Department -- Department of Transportation Gentlemen: I am involved in a lawsuit in which a large fertilizer manufacturer-distributor furnished a four wheel pull-type fertilizer applicator, constructed very similar to a normal trailer, and was used for transporting bulk fertilizer from the distribution point, on the public highways, pulled by a pickup truck, to farms, for fertilizer application. The trailer hitch was of a standard type which coupled to a hole in the rear bumper of the pickup truck. For some unknown reason, the clevis pin probably broke, the trailer became uncoupled from the pickup truck, and crossed the centerline of the public highway, killing the driver of the approaching vehicle. The trailer did not have the standard type of commonly used safety chains, which are also usually attached to the pulling vehicle to avoid accidents if the trailer hitch becomes uncoupled. Since becoming involved in this litigation, we have determined that this is not uncommon in the area, as apparently these clevis pins through use, jolts, etc., do fracture or break, but fortunately the other accidents in the area were not fatal to other people. My purpose in writing to your department is to determine: (1) Whether or not you issue any type of regulations covering the manufacture or design of such trailers? (2) Whether or not you have any type of regulations that set minimum standards for such trailers or applicators to be pulled or used on public highways? If your agency should not be involved in such, perhaps you could advise us of another regulatory agency that might have such regulations. Thanking you for this information, we are Sincerely yours, By: Harold D. Jones |
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.