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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.”

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NHTSA's Interpretation Files Search



Displaying 8541 - 8550 of 16514
Interpretations Date
 search results table

ID: nht87-3.15

Open

TYPE: INTERPRETATION-NHTSA

DATE: 10/15/87

FROM: ERIKA Z. JONES -- NHTSA

TO: G.T. DOE -- LOTUS ENGINEERING, LTD.

TITLE: NONE

ATTACHMT: LETTER DATED 02/05/87 FROM G.T. DOE TO ERIKA Z JONES; OCC 176; LETTER DATED 09/18/87 FROM ERIKA Z JONES TO J. DOUGLAS HAND

TEXT: Dear Mr. Doe:

This responds to your letter in which you asked how the conversion of a convertible to a hardtop would affect the applicability of two of our safety standards. I regret the delay in this response. You explained that Lotus proposes to introduce a new tw o seat convertible into the United States. These cars will be imported into the United States and delivered to dealers and distributors as convertibles. However, you stated that Lotus intends to offer a "factory manufactured and approved" hardtop conve rsion for these convertibles. Dealers would remove the convertible canopy and support frame and permanently attach a hard roof to the vehicle. The converted cars would be sold to the public as hardtops. You then asked whether the convertible cars would be treated as hardtops or convertibles for the purposes of Standards No. 208 and No. 216.

I would like to set the foundation for answering your specific questions by first addressing a few basic points. The agency has defined a convertible as "a vehicle whose A-pillar (or windshield peripheral support) is not joined at the top with the B-pil lar or other rear roof support rearward of the B-pillar by a fixed rigid structural member." In this case, your kit will join the A-pillar and B-pillar of the convertible by a fixed rigid structural member. After this conversion, the car would no longer be a convertible, as that term is used by NHTSA.

Section 108(a)(1)(A) of the National Traffic and Motor Vehicle Safety Act of 1966, as amended (15 U.S.C. 1397(a)(1)(A)) provides that, "No person shall manufacture for sale, sell, offer for sale, or introduce or deliver for introduction in interstate com merce, or import into the United States, any motor vehicle ... manufactured on or after the date any Federal motor vehicle safety standard takes effect under this title unless it is in conformity with such standard except as provided in subsection (b) of this section." This provision makes clear that a dealer would be prohibited from selling a hardtop passenger car that did

not comply with all safety standards applicable to hardtops, even though the passenger car conformed to all standards applicable to convertibles when it was imported and delivered to the dealer.

The exceptions set forth in section 108(b) of the Safety Act would not permit a dealer to sell a car that had been converted from a complying convertible into a hardtop without being modified to comply with all safety standard requirements applicable to hardtops. Section 108(b)(1) specifies that the prohibition on selling or offering to sell passenger cars that do not conform with all safety standards does not apply after the first purchase of the car in good faith for purposes other than resale. Howe ver, a dealer that converts a car into a different type before the first purchase could not rely on this exception.

Section 108(b)(2) specifies that the prohibition on selling nonconforming cars shall not apply to any person who establishes that he or she did not have reason to know in the exercise of due care that the car did not conform to the safety standards, or t o a person who holds a certification of conformity from the manufacturer or importer of the car, unless that person knows that the car does not conform. In the case of this proposed conversion, the dealers would hold a certificate of conformity from Lot us of the importer for the convertible version of this car. However, the dealers would also know that they had converted the car into a hardtop, and that they had no certificate of conformity for the car as a hardtop. Further, such dealers would have r eason to know that the requirements in the safety standards for hardtops are different from those for convertibles. Finally, the dealers would know that the hardtop version of the car had not been certified as conforming to all applicable standard requi rements. Indeed, as alterers of completed vehicles, the dealers would be required to recertify the cars under 49 CFR @ 567.7.

The exceptions to section 108(a)(1)(A)'s prohibition set forth in sections 108(b)(3)-(5) are not applicable in this situation. Hence, dealers could not legally sell these converted cars to the public for the first time, unless the cars conform with all safety standards applicable to hardtop passenger cars. With this background, I will now address your specific questions. They were:

1. Convertibles are not required to conform to the roof crush requirements of Standard No. 216, Roof Crush Resistance - Passenger Cars (49 CFR @571.216). Would the designation of the vehicle as a convertible remain unaffected by the hardtop conversio n?

ANSWER: As explained above, the answer to this question is no. Any car that is converted to a hardtop before its first sale for purposes other than resale must comply with all standards applicable to hardtops. Assuming such cars do not conform to the r ollover test requirements in section S5.3 of Standard No. 208 by means that require no action by vehicle occupants, these cars would be subject to the requirements of Standard No. 216.

2. Would the requirement for seating and restraint system provision remain unaffected by the hardtop conversion?

ANSWER: No. It is not clear to which seating requirements you are referring. However, you stated in your letter, "It is conceivable that, although the shelf would not be recognised as a seating area, small occupants could travel in this area." The requi rements for seating systems are dependent upon the existence of a "designated seating position." This term is defined in 49 CFR @571.3 as follows:

"Designated seating position" means any plan view location capable of accommodating a person at least as large as a 5th percentile adult female, if the overall seat configuration and design and vehicle design is such that the position is likely to be used as a seating position while the vehicle is in motion, except for auxiliary seating accommodations such as temporary or folding jump seats.

We cannot determine from your letter if the shelf area is capable of accommodating a 5th percentile adult female, nor can we determine whether the area's configuration and design is such that the position is likely to be used as a seating position while the vehicle is in motion. It appears from the enclosed drawings that any person riding in the shelf area would have to sit on the floor or prop themselves on the wheel wells. If this is true, the shelf area would not be considered to have any designate d seating positions.

The required occupant restraint system would also be affected by converting the convertibles into hardtops. As explained above, cars that are converted to hardtops by dealers before sale to the public would not be treated as convertibles for the purpose s of Standard No. 208, Occupant Crash Protection (49 CFR @ 571.208). Since the cars would no longer be considered convertibles, they would have to be equipped with lap/shoulder belts at both designated seating positions, pursuant to section S4.1.2.3.1 o f Standard No. 208. Additionally, these cars would not be eligible for the exemption for convertibles during the phase-in of the automatic restraint requirements in Standard No. 208. I sent a letter to General Motors (GM) on September 18, 1987, stating that GM may be considered the manufacturer of Lotus cars that are imported into the United States (copy enclosed). Therefore, any Lotus cars that are converted into hardtops would have to be included in GM's annual production to determine compliance wi th the phase-in requirement, pursuant to sections S4.1.3.1.2, S4.1.3.2.2, and S4.1.3.3.2 of Standard No. 208. I have also sent a copy of this letter to General Motors.

ENCLOSURE

ID: nht87-3.16

Open

TYPE: INTERPRETATION-NHTSA

DATE: OCTOBER 20, 1987

FROM: T. J. BROWN -- GENERAL MGR., PRODUCT SERVICES, MOHAWK TIRE COMPANY

TO: ERIKA Z. ZONES -- CHIEF COUNSEL, NHTSA

ATTACHMT: 11/23/88 letter from Erika Z. Jones to T.J. Brown (A33; Std. 109)

TEXT: The Mohawk Rubber Company is in the process of purchasing for resale, a group of metric size tires from a manufacturer in the Far East. It has come to our attention that the maximum load and maximum pressures molded on the sidewalls of the tires are ind icated in kilograms and kilopascals only without any indication of the maximum pounds and PSI pressure.

After reviewing MVSS #109, it is not clear as to whether or not these tires are in compliance with the standard and the purpose of this letter is to request your interpretation or ruling in this matter.

The actual stamping on the tires is indicated as follows: Size 165SR15 Load Range B Maximum Load 530kgs - Maximum Pressure 230KPA 185SR14 Load Range B Maximum Load 600kgs - Maximum Pressure 230KPA 175SR14 Load Range B Maximum Load 560kgs - Maximum Pressure 230KPA 165SR13 Load Range B Maxim um Load 475kgs - Maximum Pressure 230KPA 155SR13 Load Range B Maximum Load 420kgs - Maximum Pressure 220KPA

According to the European Tire and Rim Technical Organization, the loads and pressures are correctly designated on these tires, however, we do question if the omission of the load designation and pressure in pounds prohibits them being sold in the U.S .A.

We will appreciate your response to our request for a ruling in this matter.

ID: nht87-3.17

Open

TYPE: INTERPRETATION-NHTSA

DATE: 10/20/87

FROM: JIM SCHULD -- MILL SUPPLY INCORPORATION

TO: CHIEF COUNSEL SECRETARY -- OFFICE OF CHIEF COUNSEL NATIONAL HWY. TRAFFIC SAFETY ADMIN.

TITLE: NONE

ATTACHMT: ATTACHED TO LETTER DATED 08/26/88 TO JIM SCHULD FROM ERIKA Z. JONES, REDBOOK A32, STANDARD 207

TEXT: DEAR SIR:

WE ARE INTERESTED IN CONSTRUCTING A PASSENGER SEAT (JUMP SEAT) FOR TEMPORATY SITUATIONS IN WALK IN VANS. THIS SEAT WOULD BE REMOVABLE AND ABLE TO TRANSFER FROM ONE TRUCK TO ANOTHER.

WHAT ARE THE GUIDELINES WE NEED TO FOLLOW TO BE SURE WE WILL COMPLY WITH NATIONAL HWY AND TRANSPORTATION SAFETY ADMIN. PLEASE MAIL THIS INFORMATION TO THE ADDRESS ABOVE. ATT:JIM SCHULD.

SINCERELY,

ID: nht87-3.18

Open

TYPE: INTERPRETATION-NHTSA

DATE: 11/02/87

FROM: AUTHOR UNAVAILABLE; Erika Z. Jones; NHTSA

TO: Kenji Shimamura -- Exective Vice President and General Manager, Mazda (North America) Inc.

TITLE: FMVSS INTERPRETATION

TEXT:

Mr. Kenji Shimamura Executive Vice President and General Manager Mazda (North America) Inc. Research & Development Center 1203 Woodbridge Avenue Ann Arbor, Michigan 58105

This responds to your letter concerning the requirements of Standard No. 105, Hydraulic Brake Systems, for brake indicator lamps. The second sentence of section S5.3.2 of the standard provides that in vehicles equipped with an automatic transmission, the activation of the indicator lamp(s) as a check of lamp function is not required when the transmission shift lever is in a forward or reverse drive position. You asked if this provision can be interpreted to apply to vehicles equipped with a manual trans mission and fitted with a clutch pedal interlock switch, based on a purported equivalent function of the clutch pedal starter interlock switch to the automatic transmission starter interlock. As discussed below, the answer to your question is no. As requ ested by your letter, we will consider your request as a petition for rulemaking and process it accordingly.

By way of background information, the National Highway Traffic Safety Administration does not provide approvals of motor vehicles or motor vehicle equipment. Under the National Traffic and Motor Vehicle Safety Act, it is the responsibility of the manufac turer to ensure that its vehicles or equipment comply with applicable standards. The following represents our opinion based on the facts provided in your letter.

Section S5.3.2 of the standard states:

All indicator lamps shall be activated as a check of lamp function either when the ignition (start) switch is turned to the "on" (run) position when the engine is not running, or when the ignition (start) switch is in a position between "on" (run) and "s tart" that is designated by the manufacturer as a check position. However, in vehicles equipped with an automatic transmission, the activation as a check of lamp function is not required when the transmission shift lever is in a forward or reverse drive position.

Standard No. 105. In adding the sentence, NHTSA stated the following:

Toyota Motor Sales, Inc., has requested confirmation that S5.3.2 of the standard requires a check of the brake system indicator lamp function only when the transmission shift lever is in the "P" (park) or "N" (neutral) position (in the case of vehicles w ith automatic transmission), The literal wording of S5.3.2 requires a check of lamp function without regard to the position of the transmission shift lever, whenever the ignition switch is turned to the "on" position when the engine is not running, or wh en the ignition switch is in a position between "on" and "start" that is designated by the manufacturer as a check position. In the case of vehicles with an automatic transmission, however, this wording does not reflect the NHTSA's intent with respect to check function. To properly reflect this intent, the language of S5.3.2 is hereby modified in accordance with Toyota's request. . . . 40 FR 42872, September 17, 1975.

Thus, except to the extent provided by the second sentence of section S5.3.2, that section requires a check of lamp function without regard to the position of the transmission shift lever, whenever the ignition switch is turned to the "on" position when the engine is not running, or when the ignition switch is in a position between "on" and "start" that is designated by the manufacturer as a check position. Since the second sentence of section S5.3.2 specifically applies only to "vehicles equipped with an automatic transmission," we conclude that the sentence cannot be applied to vehicles equipped with a manual transmission.

Sincerely,

Erika Z. Jones Chief Counsel

Re: Request for Interpretation/Petition for Rulemaking - 49 CPR Part 571.105. Hydraulic Brake Systems

Dear Ms. Jones:

Mazda (North America). Inc., on behalf of Mazda Motor Corporation located in Hiroshima. Japan, (Mazda) requests that the National Highway Traffic Safety Administration (NHTSA) provide an interpretation of 49 CFR Part 571.105, 55.3. Brake System Indicator Lamp. Further, subject to the stipulations enumerated below. please consider this document a formal petition for rulemaking consistent with 49 CFR Part 552. Petitions for Rulemaking. Defect, and Noncompliance Orders.

49 CFR Part 571.105, 55.3. cites several performance requirements for brake system indicator lamps. Among these are the conditions, as a function of ignition switch position that the indicator lamp must be activated. 49 CPR Part 571.105. 55.3.2. specific ally requires the lamp to be activated whenever the ignition switch is turned to the "on" position or is turned to a position between the "on" and "start" position, dependent on the preference of the manufacturer. It also exempts certain requirements for vehicles equipped with an automatic transmission whenever the transmission shift lever is in a forward or reverse drive position.

The obvious justification for the above partial exemption is that these vehicles must also comply with the requirements of 49 CFR Part 571.102, S5.3.2. This regulation prohibits engines of vehicles equipped with automatic transmissions from starting when ever the transmission shift lever is in a forward or reverse drive position. Operation of a vehicle with the transmission shift lever so positioned is therefore not possible. The warning function of the brake system indicator lamp accordingly serves no s afety function for an inoperative vehicle.

Mazda's question relates to the lack of such a safety function on the analogous situation of a vehicle equipped with a manual transmission. such vehicles are often equipped with a clutch pedal starter interlock switch which prevents the engine from start ing (by interruption of the starter motor circuit Page 2 of 3 unless the clutch pedal is fully depressed. This device Protects the vehicle and occupants from inadvertent engine activation when the vehicle transmission is in gear and possible unexpected m ovement of the vehicle The avoidance of such an occurrence is precisely the justification for the adoption of 49 CFR Part 571.102. 53.1.3. for vehicles equipped with automatic transmissions and obviously led to the subsequent partial exemption for vehicl es so equipped from the requirements of 49 CPR Part 571.105, 55.3.2.

Based on the equivalent function of the clutch pedal starter interlock switch to the automatic transmission starter interlock, Mazda has concluded that a vehicle equipped with a manual transmission and fitter with a clutch pedal interlock switch should a lso be exempted from certain brake system indicator lamp requirements of 49 CFR Part 571.105, S5.3.2.. However, a technical interpretation of this regulation clearly does not support Mazda's conclusion to the extent that all risk of a technical non-compl iance can be eliminated.

Therefore. Mazda requests that the Agency review this issue and comment on the appraisal provided above. Mazda is especially interested in the opinion of the NHTSA regarding the ability of a vehicle equipped with a manual transmission fitted with a clutc h pedal interlock switch to apply the brake system indicator lamp activation partial exemption as provided in 49 CFR Part 571.105. S5.3.2. and still comply with all applicable provisions.

Should the NHTSA conclude that the technical language of 49 CFR Part 571.105. S5.3.2. cannot incorporate, as written, manual transmissions fitted with a clutch pedal interlock switch, please consider this document a formal petition consistent with 49 CFR Part 552. Petitions for Rulemaking, Defect, and Noncompliance Orders, and forward it to the Administrator for appropriate consideration.

Based on the discussion provided above. Mazda believes that there is ample cause for the NHTSA to afford manual transmissions equipped with clutch pedal starter interlock switches the same exemptions currently contained in 49 CFR Part 571.105, S5.3.2.. A s noted above. the manual transmission clutch pedal starter interlock switch is equivalent in function to the automatic transmission starter interlock switch currently partially exempted. No safety degradation is expected to occur if manual transmissions are also partially exempted by 49 CFR Part 571.105.5.3.2., providing the empirical and analytical justification for the NHTSA's current, limited exemption of automatic transmission starter interlocks is adequate.

Further, Mazda asserts that overall cost effectiveness and to a lesser degree, safety will actually be enhanced through fewer low speed collisions. The option for a manufacturer to employ a single wiring harness for the brake system indicator lamp circui t for vehicles equipped with both manual and automatic transmissions will be a powerful incentive for manufacturers to provide clutch pedal starter interlock switches for vehicles not currently so equipped. Unexpected motion of the vehicle during engine activation will be reduced as the clutch pedal will be depressed more often in a wider variety of vehicles prior to engine activation.

Currently, Mazda designs, produces and installs two separate brake system indicator lamp wiring harnesses for each model.,the only difference being the activation logic for the brake lamp. In both harnesses, Mazda has designed the brake system indicator lamp to activate between the "on" and "start" ignition switch position. By harmonizing the requirement between vehicles equipped with automatic transmissions and manual transmissions, this unnecessary duplication and its attendant costs will be avoided. The result will be simplification in design, production schedules, inventory controls and assembly procedures. These cost avoidances are substantial and will allow the consumer to obtain and maintain less expensive and possibly safer vehicles.

Therefore, Mazda recommends that 49 CFR Part 571.105. 55.3.2. be amended as follows:

"All indicator lamps shall be activated as a check of lamp function either when the ignition (start) switch is turned to the "on" (run) position when the engine is not running, or when the ignition (start) switch is in a position between "on" (run) and " start" that is designated by the manufacturer as a check position. However, if engine activation is prevented due to the function of any starter of engine inter-lock device, the activation as a check of lamp function is not required".

Thank you for your consideration of this matter. Should you or your staff have any questions regarding either the request for interpretation or the conditional petition for rulemaking, please contact Mr. Sadato Kadoya (313-747- 8881) for assistance.

Sincerely,

Kenji Shimamura Executive Vice President and General Manager

ID: nht87-3.19

Open

TYPE: INTERPRETATION-NHTSA

DATE: 11/03/87

FROM: J. MARK SMITH -- LYNCO PRODUCT

TO: NHTSA

ATTACHMT: ATTACHED TO MEMO DATED 8-26-88, TO J. MARK SMITH, FROM ERIKA Z. JONES, STD 302, STD 201

TEXT: Lynco Products is considering marketing the storage console-armrest for trucks and automobiles as shown in the sketch below. Would this product require D.O.T. approval? If so, does this meet the standards?

STORAGE CONSOLE-ARMREST

* LIGHT-WEIGHT WOOD FRAME CONSTRUCTION (2-3 POUNDS)

* FABRIC COVERED (ENTIRELY)

* 1 1/2" THICK FOAM PADDED TOP

* CONCEALED HINGES

* CONSOLE REMOVABLE, NOT ATTACHED TO SEAT OR FRAME

ID: nht87-3.2

Open

TYPE: INTERPRETATION-NHTSA

DATE: 09/25/87

FROM: AUTHOR UNAVAILABLE; Erika Z. Jones; NHTSA

TO: William R. Pape, Jr.

TITLE: FMVSS INTERPRETATION

TEXT:

Mr. William R. Pape, Jr. 8152 Ladoga Drive Jacksonville, FL 32217

This is in reply to your letter of August 22, 1987, to Taylor Vinson of this office, enclosing a copy of your letter to George Walton of AAMVA. In that letter you have asked three questions with reference to the center highmounted stop lamp required by F ederal Motor Vehicle Safety Standard No. 108 Lamps, Reflective Devices, and Associated Equipment, to which you have that we reply.

Your first question is "May one word be introduced on the brake light?" Standard No. 108 prohibits combining the center highmounted stop lamp with any other lamp, or with any reflective device. It does not prohibit the addition of one or more words to th e lens. However, there are basic requirements that the lamp must meet, and the word or words must not prevent the lamp from meeting them. Specifically, the effective projected luminous area of the lens must not be less than 4 1/2 square inches, and the l amp must meet specified candela maxima at 13 discrete test points.

Your second area of interest is the color red. You have asked whether it is a Federal requirement for all brake lamps, whether other colors may be substituted, and whether the color red may be adjusted to a lighter hue. Standard No. 108 requires all stop lamps to be red in color. This color is defined in SAE Standard J578c Color Specification for Electric Signal Lighting Devices, February 1977, expressing chromaticity coordinates according to the CIE (1931) standard colorimetric system. Red is rather na rrowly defined, and falls within the y coordinates, 0.33 (yellow boundary) and 0.98 (purple boundary). Red is not acceptable if it is less saturated (paler), yellower, or bluer than the limit standards. Thus red could not be adjusted beyond the prescribe d limits. In our opinion, the "soft pink" or "hot pink" that you believe is desirable would be beyond those limits. No color other than red is permitted for stop lamps.

Your final area of interest is whether one should consider marketing a lamp with the features you have indicated, and whether there are"hidden directives which would restrict or prohibit such marketing." Under the assumption that your lamp would not com ply with the color requirements of Standard No. 108, we must advise you that a noncomplying lamp could not be sold as original equipment for passenger cars, or as a replacement for center high mounted stop lamps on passenger cars manufactured on or after Sep tember 1, 1985. Federal law would not prohibit its sale for use on vehicles other than these, but the lamp would be subject to the laws of any State in which it would be sold or used.

I hope that this answers your questions.

Sincerely,

Erika Z. Jones Chief Counsel

8152 Lodoga Drive Jacksonville, FL 32217

August 22, 1987

Mr. Taylor Vincent NHTSA 400 Seventh Street, SW Washington, DC 20590

Dear Mr. Vincent:

Enclosed is a copy of correspondence to Mr. George E. Walton, director, Safety Equipment Services, and a copy of his response, suggesting direct communication with you.

Any assistance you can give with questions 1, 2, and 3 will be greatly appreciated.

Most Gratefully Yours,

William R. Pape, Jr.

WRP:BJ

Encs.

August 14, 1987

Mr. William R. Pape, Jr. 8152 Ladoga Drive Jacksonville, FL 32217

Dear Mr. Pape:

Thank you for your letter of August 6, 1987 in which you have requested information regarding stop lamps on motor vehicles.

The standard for required lighting on motor vehicles is the Federal Motor Vehicle Safety Standard 108. This standard references a number of SAE (Society of Automotive Engineers) standards which to comply with the standard.

For equipment covered by a federal standard, the states are preempted from having any other standard and must, in fact, adopt the very same standard as the federal standard.

For equipment not covered by a federal standard, the states are at liberty individually to adopt any standard they decide to recognize.

The center high mounted stop lamp is a federally regulated lamp.

The FMVSS 108 references SAE J575 for tests and specifically SAE J578d for testing the color. The specific color is shown on the chromaticity diagrams in the standard.

Since your concern is about equipment which is federally regulated, I suggest that the federal agency that administrates the standard for this equipment be contacted directly as follows:

Mr. Taylor Vincent - NHTSA 400 Seventh Street SW Washington, DC 20590 (202) 366-2992

We hope the above information helps you.

Sincerely yours,

George E. Walton, Director Safety Equipment Services

8152 Ladoga Drive Jacksonville, FL 32217

August 6, 1987

Mr. George Walton AAMVA, Suite 910 1201 Connecticut Avenue, NW Washington, D.C. 20036

Dear Mr. Walton:

As a graduate of the Duke School of Engineering and a certified instructor of Lazanov Learning Method (also known as Superlearning), I am writing to you in the interests of public safety.

The third brake light is now mandatory for American motorized vehicles dating from 1986. I have purchased a brake light to be installed on my 1982 Granada station wagon and have considered a modification which I believe to be a decided improvement. Upon asking local automotive dealers about specific regulations, I was directed to The Book of States in the public library, which lists all safety agencies of the individual United States. To determine the precise regulations, nationally, I sent letters to t he individual state agencies, and the replies indicate that there is not a general regulation covering all states, and many agencies have recommended that I correspond directly to you.

The color red is presently used for all brake lights and for traffic signal lights to indicate "stop". I, personally, find the color red, when suddenly flashed on by a car in front of me in moving traffic, to be annoying and irritating. Psychological res earch has indicated that red induces a response of anger. Red is the color of a matador's cape which enrages a bull to charge into a matador's sword. Red is associated with "fire engine red" with a loud siren with a Pavlov's bell effect of emergency, a f light of fight response and a surge of adrenaline and jangled nerves. In other words, this red light, at eye level, in traffic, contributes to unnecessary and unwanted stress, which Americans are notorious for bringing on themselves in profusion.

Thus, it is desirable to consider what may be done for more calming effects. The Lazanov system for Learning and remembering uses words and phrases which have been tested and proven to have specific physical and key word, or sometimes called a "trigger" word for an immediate calming response is the word "peace." This causes an instantaneous effect of calming both mind and body. Also, by softening the hue of bright red to a "hot pink" or even a soft pink, the same conditioned color response to signal "stop" is retained, but with much less stress and unnecessary tension. It is t he conviction of this writer that these simple alterations will reduce accidents, prevent loss of life and limb, and aid drivers to reach their destinations without having their mental, emotional, and physical energies drained. Research shows that we do everything better when in a relaxed and comfortable state, including responding to emergencies. We think more clearly and with enhanced intuition. Fewer accidents will keep insurance rates down and thereby be beneficial to the overall economy.

The intent of the regulations in regard to brake lights is obviously for public safety, and it is clear that the suggestions cited here are intended to increase public safety. In regard to brake lights, I would like to ask you what one may do and what on e may not do.

1. May one word be introduced on the brake light? This is in no way subliminal persuasion or hypnosis. this should not be confusing when one considers that our vehicles are now adorned with make and dealer names, six letter and/or digit license tags, al l kinds of advertising frequently with seven digit telephone numbers, and bumper stickers and decals. The human brain is capable of millions of on and off switches per second, so one word on a brake light will not complicate matters.

2. Is the color red a requirement by law, nationally, for all brake lights? May other colors be substituted? And may the color red be adjusted to a lighter hue?

3. Should one consider marketing a brake light with the above mentioned enhanced safety features; are there any hidden directives which would restrict or prohibit such marketing?

Thank you very much for your time and consideration.

Most gratefully yours,

William R. Pape, Jr.

WRP:bj

ID: nht87-3.20

Open

TYPE: INTERPRETATION-NHTSA

DATE: NOVEMBER 3, 1987

FROM: HUNT, BILL -- PROJECT ENGINEER, HY-GAIN DIVISION-TELEX COMMUNICATION, INC

TO: ERICA Z. JONES -- NHTSA CHIEF COUNSEL

TITLE: NONE

ATTACHMT: 12/19/88 letter from Erika Z. Jones to Bill Whiteside (Harris Corp.)

TEXT: I am writing to you concerning the interpretation of CFR 567 and 568 regarding ultimate responsibility for DOT certification.

I have spoken with Joan Tilghmam concerning this. She suggested I write to you explaining the circumstances. Please review the enclosed information. I will call soon to discuss this further.

Thank you.

TELEX COMMUNICATIONS, INC.

The parties:

Telex Communications - Trailer manufacturer

Customer: Company XYZ

Company ABC - Generator Manufacturer & Installer

Customer: Company XYZ

Company DEF - Radio Equipment Manufacturer & Installer

Customer: Company XYZ

Company XYZ - Buyer of trailer & additional installed equipment.

TELEX

ABC

DEF

TELEX COMMUNICATIONS, INC., Lincoln, NE.

Manufactures a trailer with running gear, brakes, lights, VTN, etc.

Total vehicle wt = 8000/9000#

Axle rating - 9000# ea., 18,000# total Telex work is complete.

Telex' Customer, XYZ has permanent components added to trailer by two other sub contractors (after delivery from Telex). These are items such as generators (1) & communications equipment (2).

Telex is aware of general nature and weight and location of added equipment. These factors have been used to determine trailer design.

However, Telex does not have any contractual relationship with the other subcontractors. Telex does not install and is not responsible for the installation of the added equipment.

The problem: Certification of trailer.

Telex' position:

Telex is an incomplete vehicle manufacturer and should provide documentation as stipulated in CFR 568.4a.

XYZ's position:

Telex is an incomplete vehicle manufacturer that assumes legal responsibility as in CFR 568.7a. and is responsible for final vehicle certification per 567.5e.

INTERFACE CONTROL DOCUMENT

FOR

LOS SUBSYSTEM ANTENNA TRAILERS

ESD 21410

APPROVED:

R. B. Strock, LOS Subsystem Mechanical Engineer, DATE 2/11/88;

G. M. Turner, LOS Subsystem Manager, DATE 2/10/88;

B.A. Dougherty, Quality Assurance Engineer, DATE 2/12/88;

R.E. Becerra, LOS Subsystem SPO, DATE 2/12/88

REVISION

REVISION RECORD LEVEL APPROVED ACKNOWLEDGEMENT REVISION DATE BUYER SELLER A SELLER B SELLER CFirst Release 12/11/87 ( Illegible Rev A 2/10/88 Word)

By acknowledging this document, a subcontractor agrees that the document has been reviewed and recognizes that the requirements contained herein have been imposed. TABLE OF CONTENTS Paragraph Title Page 1.0 SCOPE 1 2.0 APPLICABLE DOCUMENTS 1 3.0 REQUIREMENTS 2 3.1 General Requirements 2 3.2 Mechanical Requirements 2 3.2.1 Mechanical Interfaces 2 3.2.1.1 Antenna Trailer - Configuration and Outline Dimensions 2 3.2.1.2 Equipment Mounting Interfaces 2 3.2.1.3 Equipment Envelopes and Mounting Locations 3 3.2.1.4 Fuel Tank Interfaces 5 3.2.1.5 Connector Locations 63.2.1.6 Integrated Antenna Trailer - Weight and Center of Gravity 10 3.3 Electrical Interfaces 12 3.3.1 Contingency Van Configuration 17 3.3.1.1 Mobile Antenna Tower Interfaces 17 3.3.1.2 Contingency Van Interfaces 17 3.3.1.3 Mobile Power Subsystem Interfaces 22 3.3.2 Repeater/RIU Configuration 24 3.3.2.1 Mobile Antenna Tower Interfaces 24 3.3.2.2 Electronics Enclosure Interfaces 25 3.3.2.3 Mobile Power Subsystem 26 Appendix Mechanical Drawings A LIST OF ILLUSTRATIONS Figure Title Page 3.2.1.1.1 Antenna Trailer Outline Dimensions Appendix CV Configuration as Delivered from Subcontractor A A 3.2.1.1.2 Antenna Trailer Outline Dimensions Appendix Repeater/RIU Configuration as Delivered from Subcontractor A. A 3.2.1.2.1 Antenna Trailer Frame Appen. A3.2.1.2.2 Mobile Power Subsystem and Electronic Enclosure Mounting Holes Appen. A3.2.1.3.1 Equipment Envelopes and Mounting Locations - CV Configuration Appen. A3.2.1.3.2 Equipment Envelopes and Mounting Locations - Repeater Configuration Appen. A3.2.1.3.3 Equipment Envelopes and Mounting Locations - RIU Configuration Appen. A 3.2.1.4 Fuel Tank Cluster Plate Locations Appen. A3.2.1.5.1 RIU and Repeater Enclosure Power and Signal Entry Panel Locations 8 3.2.1.5.2 Antenna Trailer Power and Control I/O 9 3.3.1 Interconnection Diagram Contingency Van Configuration 14 3.3.2 Interconnection Diagram, Repeater/RIU Configuration 16 LIST OF TABLES Table Title Page 3.2.1.3.1 CV Configuration 3 3.2.1.3.2 Repeater Configuration 3 3.2.1.3.3 RIU Configuration 4 3.2.1.3.4 Ancillary CFE - CV Configuration 5 3.2.1.3.5 Ancillary CFE - Repeater/RIU Configuration 5 3.2.1.5 Power Subsystem Connector Locations 6 3.2.1.6.1 CV Trailer Weight and CG Summary 10 3.2.1.6.2 Repeater Trailer Weight and CG Summary 11 3.2.1.6.3 RIU Trailer Weight and CG Summary 11 3.3.1 Interconnection Cables - Contingency Van Configuration 12 3.3.2 Interconnection Cables - Repeater/RIU Configuration 15 3.3.1.2 Pin Assignments - Remote Control and Monitor 20

(Document omitted here.)

ID: nht87-3.21

Open

TYPE: INTERPRETATION-NHTSA

DATE: 11/05/87

FROM: AUTHOR UNAVAILABLE; Erika Z. Jones; NHTSA

TO: Patterson Incorporated

TITLE: FMVSS INTERPRETATION

TEXT: Mr. Barry Patterson President Patterson Incorporated 1920 Springfield Road Kelowna, B.C. VlY 7R8

Dear Mr. Patterson:

This is in reply to your letter of September 21, 1987, asking for our "acceptance and recommendation" of a safety device "endorsed" by the government of the province of Saskatchewan. This device automatically activates parking lamps, and the lower beams of headlamps "with the touch of the Brake Pedal".

The National Highway Traffic Safety Administration has no authority to accept, recommend, or endorse any item of motor vehicle equipment. We can, however, discuss the relationship of your device to U.S. Federal Motor Vehicle Safety Standard No. 109, Lamp Reflective Devices, and Associated Equipment, and the National Traffic and Motor Vehicle Safety Act ("the Act") under which the standard was issued. This standard applies to the manufacture and sale of new motor vehicles. A device such as yours is permi ssible as original vehicle equipment as long as it does not impair the effectiveness of lighting equipment required by Standard No. 108. There is no indication in your descriptive literature that the effectiveness of packing lamps, headlamps, or the stop lamps would be impaired by the installation and operation of your device. With respect to sale in the aftermarket for vehicles in use, your device is not prohibited under the Act if its installation by a person other than the vehicle owner does not rend er inoperative in whole or in part any lamps installed to comply with Standard No. 108. We see no indication that this would occur. However, such an installer should be aware of the wiring requirement in Standard No. 108 that taillamps, parking lamps, si de marker lamps, and the license plate lamp shall be activated when the headlamps are on. The rules for operation of vehicles in use are established by the individual States, and several of these may have restrictions on the use of headlamps during daylight hours. For further information on this subject you should write the American Associati on of Motor Vehicle Administrators, 1201 Connecticut Ave., N.W., Washington, D.C. 20036.

This agency has proposed that motor vehicles be equipped with daytime running lights, in a manner similar, though not identical, to the new requirement of the Canadian Ministry of Transport. If this proposal is adopted, the Act would prohibit any State f rom having a different standard than the Federal one. As of the effective date of such an amendment to Standard No. 108 daytime operation of frontal lighting should be permissible in all States. If you have any further questions we will be pleased to answer them.

Sincerely,

Erika Z. Jones Chief Counsel

ID: nht87-3.22

Open

TYPE: INTERPRETATION-NHTSA

DATE: 11/09/87

FROM: AUTHOR UNAVAILABLE; Erika Z. Jones; NHTSA

TO: D. Burkard; H.T. Ebner -- Alfred Teves GMBH

TITLE: FMVSS INTERPRETATION

TEXT:

Mr. D. Burkard Mr. H. T. Ebner Alfred Teves GMBH Postfach 900120 6000 Frankfurt 90 FEDERAL REPUBLIC OF GERMANY

Dear Mr. Burkard and Mr. Ebner:

This responds to your letter concerning the brake fluid reservoir labeling requirements of Federal Motor Vehicle Safety Standard No. 105, Hydraulic Brake Systems. You enclosed a sample and drawing of a new labeling design and asked whether it complies wi th the standard, even if there is no warning on the filler cap. Your labeling consists of a white plastic sleeve which is inserted over the mouth of the reservoir, such that the following lettering, in red, surrounds the filler cap: WARNING--CLEAN FILLER CAP BEFORE REMOVING. USE ONLY DOT 4 BRAKE FLUID FROM A SEALED CONTAINER. The plastic sleeve can be removed undamaged by lifting it over the mouth of the reservoir. You stated that the material is resistant to DOT brake fluid. Your question is addressed below.

By way of background information, the National Highway Traffic Safety Administration does not provide approvals of motor vehicles or motor vehicle equipment. Under the National Traffic and Motor Vehicle Safety Act, it is the responsibility of the manufac turer to ensure that its vehicles or equipment comply with applicable standards. The following represents our opinion based on the facts provided in your letter.

Section S5.4.3 of Standard No. 105 reads as follows:

S5.4.3 Reservoir labeling--Each vehicle shall have a brake fluid warning statement that reads as follows, in letters at least one-eighth of an inch high: "WARNING, Clean filler cap before removing, Use only fluid from a sealed container". (Inserting the recommended type of brake fluid as specified in 49 CFR 571.116, e.g., "DOT 3"). The lettering shall be--

(a) Permanently affixed, engraved, or embossed;

(b) Located so as to be visible by direct view, either on or within 4 inches of the brake fluid reservoir filler plug or cap; and

(c) Of a color that contrasts with its background, if it is not engraved or embossed.

It is our opinion that your new design would not comply with the requirement in section S5.4.3 that the lettering be permanently affixed, engraved, or embossed. Since the lettering is obviously not engraved or embossed, I will discuss the only remaining option, that the lettering be "permanently affixed." The dictionary defines "affix" as follows: to attach physically (as by nails or glue) . . . ." The word "permanent" is defined as "continuing or enduring (as in the same state, status, place) without f undamental or marked change: not subject to fluctuation or alteration: fixed or intended to be fixed . . . ." (Webster's Third New International Dictionary, unabridged edition.) In light of these definitions, we do not believe that your brake fluid warni ng lettering would be "permanently affixed." Since your design permits the lettering to easily be removed and replaced, its physical attachment cannot be considered to be continuing or enduring and not subject to fluctuation or alteration. However, it ma y be possible for you to attach the lettering to the reservoir in a manner that it would be permanently affixed. One such method would appear to be bonding, although there may be other methods as well.

Sincerely, Erika Z. Jones Chief Counsel

Ms. Kathleen DeMeter Assistant Chief Counsel for General Law National Highway Traffic Safety Administration U.S. Department of Transport 400 Seventh Street S.W. Washington DC 20 590 U.S.A.

Hauptverwaltung

Your Ref. Our Ref. Extension Date TPV/Eb/ik -2991 07.08.1987

Re.: Brake fluid reservoir labeling Our request for interpretation of FMVSS 105

Dear Ms. DeMeter,

Thank you very much for your letter of July, 1987.

The drawing No. 3-04066-26 concerning reservoir labeling is released for publication.

In anticipation that nothing will stand against further actions in interpretation of our matter,

Sincerely, Alfred Teves GMBH ppa. D. Burkard I.A. H.T. Ebner

ID: nht87-3.23

Open

TYPE: INTERPRETATION-NHTSA

DATE: 11/09/87

FROM: AUTHOR UNAVAILABLE; Erika Z. Jones; NHTSA

TO: Karl F. Milde, Jr.

TITLE: FMVSS INTERPRETATION

TEXT:

Karl F. Milde, Jr., P.C. Law Office RFD #8, Box 369 Union Valley Road Mahopac, NY 10541

Dear Mr. Milde:

This is in reply to your letter of October 2 1987 with reference to an electronic circuit that would automatically activate a vehicle's hazard warning system when the vehicle is proceeding slowly, or has stopped in the roadway. You have asked whether suc h a system has been proposed before, or field tested, and whether federal Motor Vehicle Safety Standard No. 108 would permit its installation on motor vehicles.

The traffic hazard that concerns you, especially that presented by a vehicle that has stopped in the roadway without activation of either brakes or hazard warning system, is one that is familiar to many motorists. However, it appears that in actuality mo st motorists confronted with this hazard are able to react in time to avoid a rear end collision. Accident data available to the agency indicate that crashes of this nature are relatively rare. As you know, many States require activation of the hazard wa rning system at speeds less than 40 mph on the Interstate system. NHTSA has not proposed a system of this nature, nor has it field tested one. The agency has participated in research with deceleration warning systems, a similar though not identical conce pt, and concluded that safety benefits were insufficient to propose their adoption.

We see no Federal prohibition against installation of a circuit that would activate the hazard warning system at a predetermined low rate of speed. Equipment that is not prescribed by the lighting standard is permissible as original equipment as long as it does not impair the effectiveness of equipment that Standard No. 108 does require. And modifications of vehicles in use by persons other than the vehicle owner are permissible as long as they do not render inoperative, in whole or in part, vehicle equ ipment necessary for compliance with a Federal motor vehicle safety standard. Not are we aware of any State restrictions on the use of such Q system, though you should consult the American Association of Motor Vehicle Administrators for a definitive answ er. Its address is 1201 Connecticut Avenue, M, Washington, DC 20036.

Sincerely, Erika Z. Jones Chief Counsel

October 2, 1987 CERTIFIED MAIL, RRR

Erica Z. Jones, Esq. Chief Counsel National Highway Traffic Safety Administration Room 5219 400 7th Street, Southwest Washington, D.C. 20590

Re: Automatic Hazard light for motor vehicles Dear Ms. Jones:

Brian O'Neill of the Insurance Institute for Highway Safety suggested that I write to you and request your comments on the memorandum.

In particular, I respectfully request your answers to the following two questions:

(1) Has an automatic hazard light been proposed before? If so, has its effectiveness been field tested?

(2) Does the federal Standard 108, as presently formulated, permit the installation of an automatic hazard light on a motor vehicle?

Your comments on any prior experience with this safety device as well as your "interpretation letter" on its legality would be greatly appreciated.

Very truly yours, Karl F. Milde, Jr. Enclosure cc: Mr. Brian O'Neill

MEMORANDUM

TO: N H T S A FROM: Karl F. Milde, Jr. DATE: October 1, 1987 RE: Automatic Hazard Light

I would like to alert you to a traffic hazard that has plagued me personally, many times, and which can be completely eliminated by a simple electronic circuit on a motor vehicle:

Frequently, the vehicle in which a motorist is driving - call it "vehicle 2" - is proceeding down a highway at a normal highway speed: e.g., 30-55 MPH. The vehicle of another motorist - call it "vehicle 1" - is stopped or is proceeding very slowly on the same highway ahead of vehicle 2. (There may be any number of reasons why the vehicle 1 has stopped or proceed slowly: the operator of vehicle 1 may intend to turn left after oncoming cars have passed; there may be traffic congestion ahead of vehicle 1; or vehicle 1 may be disabled with an overheated engine, flat tire or the like.) Normally, the operator of vehicle 1 will have applied the brakes so that the brake lights of vehicle 1 are illuminated, alerting the operator of vehicle 2. Often, however, th e operator of vehicle 1 does not have a need to apply the brakes because vehicle 1 has either stopped or is proceeding slowly at a steady speed. Alternatively, the operator of vehicle 1 can switch on flashing "hazard" lights, but this requires positive a ction on the operator' s part which is frequently forgotten. In the absence of any warning lights, the operator of vehicle 2 may not notice that vehicle 1 has stopped or is proceeding slowly until it is too late to prevent vehicle 2 from colliding with t he rear of vehicle 1.

There is a simple solution to this all-too-frequent traffic hazard: namely, an electronic circuit which will automatically switch on the hazard lights of a motor vehicle when this vehicle is detained (has stopped or proceeds slowly) on a highway.

With such a circuit the hazard lights will warm the drivers of vehicles approaching from the rear, even though the operator of the motor vehicle has forgotten to manually actuate the hazard light switch.

Such a circuit could not possibly cost more than a couple of dollars and, if every vehicle were so equipped, many accidents (and personal injuries) could be avoided.

As an example, I am attaching a newspaper report of a truck driver who failed to notice that traffic had stopped in front of him on the New Jersey Turnpike. The consequence was fatal. Had the cars ahead of him been flashing hazard lights, the truck drive r would surely have brought his vehicle to a safe stop.

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.