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: 1983-3.2OpenTYPE: INTERPRETATION-NHTSA DATE: 09/02/83 FROM: AUTHOR UNAVAILABLE; Frank Berndt; NHTSA TO: Peterson Manufacturing Company -- Paul Scully, Vice President TITLE: FMVSS INTERPRETATION TEXT:
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 this 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 paragraph applies only to turn signal lamps manufactured between January 1, 1972 and September 1, 1978, and that turn signal lamps must now comply with SAE Standard J588e, September 1970.
Paragraph S.4.1.1.7 did allow vehicular compliance with SAE J588d as an 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
Enclosure
July 22, 1983
Mr. Kevin Cavey National Highway Traffic Safety Administration 400 Seventh Street SW Nassif Building Washington, DC 20590
Dear Kevin:
I need a copy of the Bureau of Motor Carrier Safety Regulations and I no longer have in my files the address of that agency. Would you be kind enough to telephone them and request that a copy of that booklet be forwarded to me. I would certainly appreciate it. On a completely separate subject, a question arose today concerning the meaning of Paragraph S4.1.1.7 in FMVSS 108. The specific question related to the square inches of area needed for a turn signal on vehicles over 80".
My interpretation of the regulation has been that turn signal lamps for vehicles over 80" must comply with J588e dated September, 1970. This standard requires 8 square inches of area for single compartment lamps. That standard also spells out that when lamps are mounted closer together than 22" on vehicles over 80", they must then individually meet all of the requirements and must be 12 square inches.
Paragraph S4.1.1.7 only applies to turn signal lamps manufactured between January 1, 1972 and September 1, 1978 and simply permitted compliance with the prior standard J588d. This specific paragraph, in my judgment, only relates to vehicles built between the dates spelled out above and does not impact the area requirements as otherwise spelled out in J588e. Specifically, it is our understanding that the rear turn signal area for single compartment lamps is eight square inches regardless of the width of the vehicle. The only exception to this requirement is spelled out in the SAE standard which states that the area must be 12 square inches if indeed the units are placed closer together than 22". Can you please advise me if my interpretation is correct?
Very truly yours,
Paul Scully Vice President
PS/sld |
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ID: 1983-3.20OpenTYPE: INTERPRETATION-NHTSA DATE: 11/17/83 FROM: FRANK BERNDT -- NHTSA CHIEF COUNSEL TO: PEKKA SUURONEN -- PRODUCT DEVELOPMENT MANAGER RACEMARK INTERNATIONAL, INC. TITLE: NOA - 30 ATTACHMT: LETTER DATED 07/27/83 FROM PEKKA SUURONEN TO NHTSA TEXT: Dear Mr. Suuronen: This is in reply to your letters of July 27, 1983, and October 6, 1983, asking whether a sealed headlamp with "replaceable European H4 bulb," or "Ford bulb (6 standard sizes)" are considered "legal," (like Cibie BOBI) "provided it meets with all the applicable SAE standards." Cibie certifies that its "BOBI" headlamp complies with all applicable Federal motor vehicle safety standards, pursuant to Section 114 of the National Traffic and Motor Vehicle Safety Act. Thus far, the National Highway Traffic Safety Administration has not contested that certification. We do not understand your reference to the Ford bulb in "6 standard sizes." The only size of that bulb that may be used in the new replaceable bulb headlamp systems is the one specified in the recent amendment to Standard No. 108. However, Volkswagen has petitioned for rulemaking to allow the H4 bulb. Sincerely, |
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ID: 1983-3.21OpenTYPE: INTERPRETATION-NHTSA DATE: 11/18/83 FROM: AUTHOR UNAVAILABLE; Frank Berndt; NHTSA TO: Hueck & Co. TITLE: FMVSS INTERPRETATION TEXT:
Mr. I. A. Wuddel Westfalische Metall Industrie KG Hueck & Co. Postfach 28 40 4780 Lippstadt Germany
Dear Mr. Wuddel:
This is in reply to your letter of September 9, 1983, to August Burgett of this agency. With reference to the recent amendment to Motor Vehicle Safety Standard No. 108 permitting semi-sealed replaceable bulb headlamp systems, you have asked whether a headlamp assembly would be allowed which also incorporated a European H1 or H2 bulb, "for an auxiliary driving beam or a front fog lamp, as our customer requests it."
It is our understanding that the H1 bulbs are commonly used in European lamps as the principal lighting source, and that H2 bulbs are used in high intensity supplemental front lamps. Therefore, use of one of these bulbs in a replaceable bulb headlamp would create, in effect, a system of four headlamps. The agency recently denied a petition by Volkswagen for a four-lamp system at this time using the standardized replaceable light source (copy enclosed), because of unresolved issues. We therefore are currently unable to allow a system such as you propose with the H1 or H2 bulb in a common housing with the standardized replaceable light source, creating in effect a four-lamp headlamp system. Further, paragraph S4.1.3 of Standard No. 108, prohibits the installation of additional lighting equipment which impairs the effectiveness of lighting equipment required by Standard No. 108, and there is the distinct possibility that this could occur through incorporation of the H1 and H2 bulbs. Use of the H1 and H2 bulbs in separate and independent units for driving or fog lamps remains permissible, subject to regulation by the individual American States, as these items are not covered by Standard No. 108.
You may be interested to know that Volkswagen of America has recently petitioned us for rulemaking that would allow use of the H4 bulb instead of the standardized replaceable light source in replaceable bulb headlamp systems. A decision is pending whether to grant this petition. Sincerely,
Frank Berndt Chief Counsel Enclosure
Mr. A. Burgett Office of Vehicle Safety Standards National Highway Traffic Safety Administration 400 Seventh Street, S.W. USA - Washington, D.C. 20590
BV Wu/Mei 7509 09-09-1983
Dear Sir,
Since optional headlighting systems are allowed according to FMVSS No. 108 (Docket No. 81-11, Notice 3) on certain promises, we intend to develop a semi-sealed headlamp assembly with two adjacent reflectors, moulded as one part, and a lens covering both reflector sections. The lens and the dual reflector would be sealed. The outward reflector would be equipped with a standardized replaceable bulb (Ford bulb) for the required upper and lower beam, and the inward reflector would be equipped with a european replaceable bulb type "H1" or "H2" for an auxiliary driving beam or a front fog lamp, as our customer requests it. The optical axis of the system would be parallel. On surface of the lens area for upper and lower beam there would be three aiming pads by which a common aiming adjustment of both the upper/lower beam and the auxiliary driving or fog lamp beam could be carried out.
We would like to learn whether such a headlamp assembly would be allowed or it is required that the aiming adjustment must be possible for each reflector.
Please find attached sketch.
Yours sincerely
Westfalische Metall Industrie Kommanditgesellschaft Hueck & Co. i. A. Wuddel Headlamp Assembly
*Insert diagram here |
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ID: 1983-3.22OpenTYPE: INTERPRETATION-NHTSA DATE: 11/19/83 FROM: AUTHOR UNAVAILABLE; Frank Berndt; NHTSA TO: Libby-Owens-Ford Company TITLE: FMVSS INTERPRETATION TEXT:
Mr. Richard P. Keim Manager of Automotive Glass Replacement Services Libby-Owens-Ford Company 811 Madison Avenue P.O. Box 799 Toledo, Ohio 43695
Dear Mr. Keim:
This responds to your letter of September 26, 1983, regarding the certification and marking requirements for glazing under S6 of Safety Standard No. 205, Glazing Materials. You stated that you are interested in "out-sourcing some of your replacement auto glass requirements" to other manufacturers and sought clarification on four points concerning glazing identification.
Section 6 of Standard No. 205 deals specifically with the certification and marking requirements for glazing materials. The standard incorporates by reference the American National Standard "Safety Code for Safety Glazing Materials for Glazing Motor Vehicles Operating on Land Highways," Z26.6-1966 (ANS Z26). You ask whether it is permissible under National Highway Traffic Safety Administration (NHTSA) regulations to allow another manufacturer, using its own DOT code mark, to put an LOF trademark and logo on its glass.
Section 6 of ANS Z26 states that a manufacturer shall mark safety glazing materials with its own "distinctive designation or trademark." The purpose behind these markings was to aid in the tracing of glazing materials and the enforcement of applicable standards. Your letter states that the other manufacturer will place their DOT code mark on the safety glass. Since the other manufacturer is using its own DOT code mark, the tracing and enforcement policies will not be circumvented. Therefore, under these circumstances, the use of LOF's logo and trademark is not violative of Standard No. 205.
Further, you ask whether another glass manufacturer can use LOF's "M" number on his glass with LOF's permission. As long as the model number is an accurate description of the specific glazing material being produced, the other manufacturer may use it. Lastly, you ask if the name of the country of manufacture must appear on the safety glass if not manufactured in the United States. The standard does not mandate that the country of manufacture be marked on the safety glazing materials.
Sincerely,
Frank Berndt Chief Counsel
September 26, 1983
Mr. Steven Oesch Chief Counsel Department of Transportation National Highway Traffic Safety Adminstration 400-7th Street S.W. Room 5219 Washington, D. C. 20590
Dear Mr. Oesch:
This is in regard to our phone conversation of September 22, 1983. We are contemplating out-sourcing some of our replacement auto glass requirements with other manufacturers but we feel we need a clarification of the requirements of manufacturers identification on the actual glass parts.
LOF's "DOT" registration No. is 15. This number along with the LOF logo "AS" number "M" number, etc. appears in the monogram on each piece of glass we produced in accordance with DOT regulations. Our scenario is this. We have been told by other glass manufacturers that they could produce glass for LOF using LOF's logo ( or name ) and glass description in combination with their "DOT" registration number. An example of this is depicted below:
Typical monogram as currently placed on glass produced by LOF: "INSERT"
Proposed alteration of monogram to be used by another manufacturer producing glass for LOF with LOF's permission, would be to substitute their own DOT Registration No. in place of DOT 15. Questions which we have raised include:
1. Can another glass manufacturer put an LOF trademark on his glass with permission from LOF?
2. Can another glass manufacturer put the LOF logo on his glass with permission from LOF?
3. Can another glass manufacturer use LOF's "M" number on his glass with permission from LOF?
4. Must the name of the country of manufacture appear on the glass if manufactured in a country other than the U.S.? For example - Made in U.S.A does not have to appear on our glass.
If the answer to any of these questions is no, please explain if there is any other substitution(s) that could be made which would make it permissible for another manufacturer to put the name LOF on glass he manufactures.
It has been indicated to us that some manufacturers are already producing glass using other companies names on their glass, but using their own DOT number.
Your consideration of this issue and prompt reply will be greatly appreciated.
Regards,
Richard P. Keim Manager of Automotive Glass Replacement Services
RPK/slj
cc: A. E. Riggs J. M. Oathout R. E. Miller C. C. Washing J. W. Leonard G. C. McNaul |
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ID: 1983-3.23OpenTYPE: INTERPRETATION-NHTSA DATE: 11/22/83 FROM: AUTHOR UNAVAILABLE; Frank Berndt; NHTSA TO: LJM Associates Inc. TITLE: FMVSS INTERPRETATION TEXT:
NOV 22 1983
Mr. Lee Jay Mandell President, LJH Associates. Inc. 22030 Lanark Street Canoga Park, California 91034
Dear Mr. Mandell:
This is in response to your letter of October 19, 1983, discussing a lighting product that you have developed and asking for "the approval of the DOT or at least to insure that no active disapproval would be forthcoming.
Your device utilizes the body panel between the left and right rear lights to emphasize braking, right and left turns, hazard flashing, and backing up. Roughly, your devise operates by lights spreading from the center of the panel outward, in either or both directions. We think that there is a great potential for confusion that this devise could create since it is so unlike anything seen before on a motor vehicle. In the stopping mode the driver following will see the steady light of the stop lamp at the edge of the vehicle, but also the dynamic lights of your devise spreading out from the center. The same dynamic light spread is seen but is meant to indicate something entirely different when both turn signal lamps are operating simultaneously in the hazard warning mode. Thus, the potential for impairment of the required lighting equipment exists. Generally, we do not favor any lights on the rear of a vehicle that are not required by the Federal lighting standard.
Sincerely,
Frank Berndt Chief Counsel
October 19, 1983
U.S. Department of Transportation National Highway Safety Administration 400 Seventh Street, S.W. Washington, D.C. 20590
Attn: Chief Counsel
Dear Sir:
I am president of a small consulting firm in Los Angeles that has developed a product that at worst I believe to be a decorative device and at best I believe to enhance the safety of an automobile. I hope to be raising venture capital in the near future to allow me to go into production of this device but before I do so I would Like to obtain approval of the DOT or at least to insure that no active disapproval would be forthcoming.
This device is a display integrated into the standard rear grill many production automobiles. The intention of this device is to enchance the normal rear lights on an automobile and to exist in addition to and to not impair the effectiveness but to enchance the normal operating characteristics of the existing rear lights (Motor VehicLe Safety Standard No. 108 - S4.1.3).
The major functions of this device work in conjunction with normal light functions without any additional operator intervention. Some of these functions are:
BRAKE < -> < ---> < -----> BRAKE
RIGHT TURN
LEFT TURN
EMERGENCY FLASHERS
CAUTION
REVERSE BACKING UP
Some sample photographs are enclosed to illustrate these displays. Please feel free to contact me if necessary to insure a positive disposition of this inquiry.
Sincerely,
Lee Jay Mandell President, LJM Associates, Inc.
INSERT GRAPH HERE
INSERT GRAPH HERE |
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ID: 1983-3.24OpenTYPE: INTERPRETATION-NHTSA DATE: 11/22/83 FROM: AUTHOR UNAVAILABLE; Frank Berndt; NHTSA TO: Peterson Manufacturing Co. TITLE: FMVSS INTERPRETATION TEXT:
Mr. Paul Scully Vice President Peterson Manufacturing Co. 4200 East 135th Street Grandview, Missouri 64030
Dear Mr. Scully:
This is in reply to your letter of October 25, 1983, to Mr. Cavey of this agency asking for a copy "of an NHTSA ruling issued sometime ago which supposedly permits the triple identification lights normally mounted on the top rear center line of semi-trailers to be mounted at the lower sill location."
I enclose a copy of an interpretation furnished the State of Wisconsin on June 18, 1981, concerning this practice by Fruehauf Corporation. In summary, Fruehauf demonstrated to us the impracticability of mounting the lights at the top of a body with high-opening doors and a narrow header (chiefly because of vulnerability of the wiring).
The agency's interpretation was limited to vehicles of that specific configuration, and was not intended to apply to semi-trailers in general.
If you have any further questions, we shall be glad to answer them. Sincerely,
Frank Berndt Chief Counsel Enclosure
October 25, 1983
Mr. Kevin Cavey Crash Avoidance The National Highway Traffic Safety Administration 400 Seventh Street SW Nassif Building Washington, DC 20590
Dear Kevin:
At the recent SAE Lighting Committee meetings, there was some discussion of an NHTSA ruling issued sometime ago which supposedly permits the triple identification lights normally mounted on the top rear center line of semi-trailers to be mounted at the lower sill location. Frankly, I was rather surprised at this and had not been aware of any such ruling. Most of the industry now feels that the NHTSA has granted the trailer industry permission to mount these triple identification lamps at the lower sill level rather than at the top most part of the trailer which had previously been required. I would very much appreciate it if you could send me a copy of the reference letter which had been discussed granting permission for these lamps to be mounted at the lower heighth.
Since the rear clearance lamps are now normally mounted in combination with the turn signal lamps at the lower rear of the trailer, these identification lights were really the only high mounted lamps required on the rear of the trailers and they served well to indicate that a heavy, over 80" vehicle was on the highway. If these lights are permitted to be mounted at the lower level, the following drivers will have absolutely no means of knowing that a large, heavy-duty vehicle is in front of them. If information I have received is correct, in a few years time we have gone from these five high mounted lights on the rear of semi-trailers to no lighting at the top of the trailer. Obviously, a vehicle directly behind the trailer could block all access to the lower lights and a following driver, except the one directly behind the trailer, would have no way of knowing the vehicle was even there. I am quite surprised that NHTSA would grant such an exception on a permanent basis and therefore I would very much appreciate a copy of that so-called ruling which I understand has been issued. Very truly yours,
Paul Scully Vice President
cc: Don Armacost, Jr. Joe Hodges |
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ID: 1983-3.26OpenTYPE: INTERPRETATION-NHTSA DATE: 11/22/83 FROM: AUTHOR UNAVAILABLE; Frank Berndt; NHTSA TO: Mr. John R. Hughes -- Vice President, The Kansas City Southern Railway Company TITLE: FMVSS INTERPRETATION TEXT:
Dear Mr. Hughes:
This is in reply to your letter of October 13, 1983, furnishing the information I suggested in my letter of August 15 to Mr. Snyder. As you know, I wrote Mr. Stalder of Carland on February 8, that the rail inspection vehicle you wish to purchase, is a "motor vehicle" as defined by the National Traffic and Motor Vehicle Safety Act, because it was not manufactured exclusively for use on rails, and, in our experience, would spend some portion of its life on the public roads. In reply, Mr. Snyder raised the possibility that any off-track utilization by Kansas City Southern would be on its private roads, and I asked for clarification of that point. You have now indicated that this Mercedes but with railroad track conversion will indeed spend 30% of its time on the public roads. We therefore affirm our interpretation of February 8, that this vehicle is a "motor vehicle" which must meet applicable Federal motor vehicle safety standards, even if Kansas City Southern purchases only one of them, and intends to scrap it at the end of its operating life.
Sincerely,
Original signed by Frank Berndt, Chief Counsel
October 13, 1983
Mr. Frank Berndt Chief Counsel 400 Seventh Street SW Washington, DC 20024
In re: Swil Weg Vehicle Utilization and Disposition
Dear Mr. Berndt:
This is to clarify the use of the Zwel Weg/Mercedes vans being considered for purchase by Carland, Inc. for lease to The Kansas City Southern Railway Company. The vans will primarily be used in track inspection and transportation of maintenance of any personnel. The value of these vehicles is that they can be easily and economically utilized on the existing rail facilities. The vehicles would be used on public roads to transport personnel to and from public facilities (motels, restaurants, etc.) within their area of operations. It is estimated that the off track on (public) road utilization will be approximately 30%.
At present, The Kansas City Southern Railway Company is not utilizing any of these vehicles and there are no definite commitments for purchase by Carland, with the exception of the vehicle presently in the country--provided that this vehicle can be brought into conformity. When this is achieved, it is currently anticipated that an additional unit will be purchased for use by The Kansas City Southern Railway Company at its Shreveport, Louisiana facility. Future purchases will be contingent upon the success of these vehicles, subsequent prices and the needs of the railroad. The vehicles will be used as long as is possible. When they are no longer economically operable (whether due to damage, or due to the vehicles becoming uneconomical to repair or maintain), they will be scrapped. The modifications which have been added to these vehicles to which the rail system is attached are permanently affixed by welding and are not transferable to another vehicle. The conversion unit can, in any event, only be properly fitted by the Zwel Meg Company machinists. The Conversion unit, although accessible for servicing and maintenance, is not readily removable. The unit cannot be fitted to another vehicle without factory personnel and, in any event, the warranties would then become null and void.
The purchase price for the vehicle, as equipped, is approximately $40,000, which makes removal of the conversion unit and operating the vehicle as a road vehicle not only impractical, but also excessively expensive.
The Kansas City Southern Railway Company is particularly interested in this vehicle because there is no comparable machine made in the United States. The presently available vehicles all have what Kansas City Southern considers to be serious limitations and problems which have rendered them less than satisfactory in their use experience.
We appreciate your reconsideration of this matter.
Sincerely yours, Original signed by John H. Hughes |
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ID: 1983-3.27OpenTYPE: INTERPRETATION-NHTSA DATE: 11/23/83 FROM: AUTHOR UNAVAILABLE; Frank Berndt; NHTSA TO: Mr. Eddie Wayne TITLE: FMVSS INTERPRETATION TEXT:
NOA-30
Mr. Eddie Wayne 4306 Emmet Drive Erie, Pennsylvania 16511
Dear Mr. Wayne:
Thank you for your recent note asking if motorcycle headlamps could not be required to have a blue or green lens across the top portion, so that cycles could be distinguished from a four-wheeled motor vehicle with only one headlamp.
This is an interesting suggestion. However, we would not wish to impose a requirement that would interfere with the effectiveness of the single headlamp with which most motorcycles are equipped. The other side of the coin is marking the four-wheeled vehicle so that it is distinguishable from a motorcycle when one of its headlamps is out. We currently require passenger cars, light trucks, and others, to have amber or white parking lamps and amber front side marker lamps that are illuminated when the headlamps are on. While these lights may not be as readily visible from greater distances as a headlamp, nevertheless their presence on a vehicle does help to distinguish that vehicle from a motorcycle at night, when a headlamp is missing.
Thank you for your interest in safety.
Sincerely,
Frank Berndt Chief Counsel |
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ID: 1983-3.28OpenTYPE: INTERPRETATION-NHTSA DATE: 11/28/83 FROM: AUTHOR UNAVAILABLE; Frank Berndt; NHTSA TO: Porsche Aktiengesellschaft TITLE: FMVSS INTERPRETATION TEXT:
NOV 28, 1983
DR. ING.h.c. F. Porsche AG z. H. Herrn Mayer/ESV Postfach 11 40 7251 Weissach West Germany
Dear Mr. Mayer:
This is in response to your 1etter of October 13, 1983, to Nelson Erickson of this agency, requesting our interpretation of certain requirements in Federal Motor Vehicle Safety Standard (FMVSS) No. 118, Power-Operated Window Systems.
A recent amendment to section 3(d) of FMVSS 118 (48 Fed. Reg. 46793, October 14, 1983, copy enclosed) permits power window operation during the "interval between the time the locking device which controls the activation of the vehicle's engine is turned off and the opening of either of a two-door vehicle's doors or, in the case of a vehicle with more than two doors, the opening of either of its front doors." As you point out in your recent letter, the opening of the vehicle's front doors would typically be sensed through the interior roof lamp electrical circuit. This circuit would be activated when the door is opened 8 to 10 inches from the frame. You ask whether it is permissible under the standard to have power windows remain operable until the door is opened to this point where the roof lamp is activated.
FMVSS 118 is primarily intended to prevent the unsupervised operation of power windows by children remaining in a vehicle. See 48 Fed. Reg. 46793. Paragraph 3(d) was drafted to be consistent with this goal, since it is highly probable that the driver would still be in the vehicle during the specified time interval. Your proposed interpretation is also consistent with the standard's goal, since the driver would not likely be able to leave the vehicle with the door only ajar.
Therefore, we agree that power systems may remain operable under paragraph 3(d) of FMVSS 118 until the door is opened far enough to permit a small adult to leave the vehicle. The 8 to 10 inch point where the roof lamp is activated appears to be within this permissible range
Sincerely,
Frank Berndt Chief Counsel
Enclosure
Mr. Nelson Erickson Office of Vehicle Safety Standards National Highway Traffic Safety Administration 400 Seventh St., S.W.
Washington,D.C. 20590
USA
ESVG-My-re Weissach,October 13,1983
Subject: Request of Clarification of the term "opening" - FMVSS 118 Dear Mr. Erickson,
We kindly ask for clarification of the above mentioned term. Your early favorable consideration of our request would be greatly appreciated as we presently can not continue to design any further on this matter until we receive an answer from you. Sincerely yours,
Dr. Ing.h.c.F. Porsche AG -Technical Administration-
Dr.Ing. h.c.F.porsche AG z.H. Herrn Mayer/ESV Postfach 11 40 7251 Weissach WEST GERMANY
Mayer Enclosure
Request of Clarification of the term "opening" in relation with FMVSS 118, Power-Operated Window System
With publication of Docket No. 82-07; Notice 2 (Federal Register Vol. 48, No. 88, Page 20237 of May 5, 1983) Standard 118 was amended to the extent that the use of the power window or partition systems are admissible, pursuant to S 3 (d), which states that: "during the interval between the time a running engine is turned off and the opening of either of a two door vehicle's door or, in the case of a vehicle with more than two doors, the opening of either of "its front doors".
Porsche welcomes this amendment and would like to use this as a future opportunity to improve comfort and still maintain the present safety level.
In design, the interior roof lamp door switch is normally used to signal to the power source of the window regulators if the door is in an "opened" or in a "closed" position.
We now ran into the following problem which we believe to be a basic problem for all the automakers:
In practice it is not common to adjust the door switch or to locate the switch on the carbody in order to function if the door is opened just for a crack, forexample a fraction on an inch. The building tolerances of the carbody in the area of the door-post are the result of a series of individual tolerances of various parts, including the door switch and is for this reason usually not to small.
Normally this switch actuates when the door is opened between 8" to 10" - the distance between the carbody and the rear end of the door. Even a slim adult will not be able to get out of the car through an opening like this. In our opinion it is admissible and for design necessary to pinpoint the extent of the opening in order to define the difference between the terms "opened" and "closed" in relation to a car door.
Your early favorable consideration of our request would be greatly appreciated since we have stopped designing until we receive an answer from you.
Sincerely yours,
Dr. Ing.h.c. F. Porsche AG -Technical Administration- |
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ID: 1983-3.29OpenTYPE: INTERPRETATION-NHTSA DATE: 12/01/83 FROM: AUTHOR UNAVAILABLE; Frank Berndt; NHTSA TO: Mazda Inc. -- H. Nakaya TITLE: FMVSR INTERPRETATION TEXT: Dear Mr. Nakaya:
This responds to your October 13, 1983 letter regarding the classification of certain hypothetical mini-van models as either passenger cars, multipurpose passenger vehicles, or trucks for purposes of complying with Federal motor vehicle safety standards.
Your first question involved the effect of changes in floor pan geometry on this classification. You postulate separate cargo and passenger versions of the mini-van, with each version using identical suspension, steering and driveline components and each vehicle being of unibody construction. However, slight differences would exist in the floor pans of the two vehicles, with the passenger version having a lowered floor pan section to accommodate the rear seat.
Assuming that the cargo version has greater cargo-carrying volume than passenger carrying volume (see, e.g., 49 CFR part 523), we would consider that version to be a truck. (In the unlikely event the cargo version does not have that ratio of volumes, all versions of the mini-van would probably be considered passenger cars.) Since the passenger version of a mini-van would almost certainly have greater passenger-carrying volume than cargo carrying volume, that vehicle would be treated as a passenger car unless it meets the agency's "multipurpose passenger vehicle" definition. That definition provides, in relevant part, that an MPV is a motor vehicle designed to carry 10 people or less and which is constructed on a "truck chassis." The "chassis" of a vehicle includes the vehicle's power train as well as its entire load supporting structure. In the case of a vehicle using unibody construction, this load supporting structure would technically include the floor pan.
The fact that a common chassis is used in a family of vehicles, one member of which is classified as a "truck," is evidence that the common chassis is a "truck chassis." However, further evidence is needed to demonstrate that the chassis has truck attributes, such as information showing the design to be more suitable for heavy duty, commercial operation than a passenger car chassis. This further evidence is necessary since otherwise the introduction of a cargo carrying version of an existing passenger car could result in the reclassification of the passenger car into an MPV, if the agency only considered the issue of whether a common chassis is used. For example, in the past, certain station wagons have been marketed without rear seats and with other modifications which render them the functional equivalent of a cargo van. The agency does not believe it to be appropriate in such a situation to reclassify the basic station wagon as an MPV.
The floor pan differences mentioned in your first question do not appear to be so significant as to require treating the two mini-van versions as having different chassis. The agency does not consider minor floor pan differences to negate the fact that two versions of the same family of vehicles employ the same "chassis," since to do so would likely mean that no unibody vehicles could be classified as MPV's. However, in the absence of any information regarding the extent to which the common chassis has truck-like attributes, we cannot state whether the vehicle would be treated as an MPV.
Your second question involves the effect of various seating designs on whether a unibody constructed mini-van is classified as an MPV. Since the seats are not part of the vehicle chassis, these variations should have no impact on whether the vehicle is an MPV. (Fuel economy classifications are dependent on seat configuration however--see 49 CFR Part 523.)
Your third question involves the significance of the relative sales levels, order of introduction, and actual existence of two versions (cargo and passenger) of the mini-van. In theory, a passenger version of a mini-van could be classified as an MPV even if no cargo version were offered in the U.S. or indeed if none were ever produced. In such a situation, however, the manufacturer would be under a heavy burden to demonstrate that what is sold as a passenger carrying vehicle in fact has a "truck chassis," with heavy duty, commercially suited attributes. The existence of a truck version, and the fact that the truck version was either designed first or was the principal focus of the design would be additional factors which would tend to indicate that the chassis is a truck chassis.
If you have further questions in this matter, please contact us. Sincerely,
Frank Berndt Chief Counsel October 13 1983
Mr. Frank Berndt Chief Councel National Highway Traffic Safety Administration 400 Seventh Sreet, S .W. Washington, D. C. 20590
Dear Mr. Berndt :
A great deal of confusion exists in the automotive industry concerning the precise classification of 'mini-vans'. Specifically, these vehicles could be classified as passenger vehicles, multipurpose vehicles (MPV), or light-duty trucks (LDT), depending on the criteria applied. Mazda (North America), Inc. is interested in this subject and has a number of items that have not been satisfied by existing definitions.
Please examine the following questions and respond to relevant safety compliance implications, if any.
1. Existing standards (MVSS ? 571.3 (b)) indicate the criteria for a multipurpose vehicle as being 'constructed either on a truck chassis or with special features for occasional off-road use'. Assuming the original truck is of unibody construction --a) Is the same chassis considered in the modification of the floor pan from LDT to MPV? (See Sketch 1).
b) What impact would floor pan geometry modification from the truck versions to the MPV version have on MPV classification, assuming identical suspension, steering and driveline components? c) Can a common floor pan be used for both the truck version and the MPV version, with the addition of a flat platform in the truck version --
1) Bolted in place (removable)?
2) Welded in place (permanent)? (See Sketch 2).
2. Assuming the original truck is of unibody construction, what influence does the rear seating design have on MPV classification if the additional seating configurations are -- a) Pedestal assemblies bolted to the floor pan that when removed result in a flat surface? (See Sketch 3).
b) Attached seat cushion and back assemblies that fold forward together at a single pivot with respect to the floor pan result in a flat surface? (See sketch 4).
c) Separate seat cushion and back assemblies that fold forward sequentially at two pivot points resulting in a flat surface? (See Sketch 5).
d) Fold down seat backs attached at the pivot point to a stationary seat cushion resulting in a flat surface? (See Sketch 6).
3. If a MPV classification is desired as 'derived' from a truck chassis --
a) Assuming the engineering, design, tooling, testing, etc. is completed for the truck version, must the truck version be built at al1 to insure MPV classification?
b) Assuming a truck version must be introduced, can the MPV version be introduced first followed by a later truck version introduction?
c) Assuming a truck version must be introduced, can the truck and MPV be introduced simultaneously?
d) Assuming a truck version must be introduced, must the truck be introduced in the United States market to insure MPV classification?
e) Assuming a truck version must be introduced, does the proportion of truck versus MPV versions sold influence the MPV classification if --
1) Both versions are sold in the United States?
2) Only the MPV version is sold in the United States?
Thank you for your help in this important matter. Very truly yours,
H. Nakaya Manager
HN/ab
cc:Mr. R. Fairchild
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