Interpretation ID: nht94-4.71

TYPE: INTERPRETATION-NHTSA

DATE: October 31, 1994

FROM: Philip R. Recht -- Chief Counsel, NHTSA

TO: Trevor Buttle -- McLaren Cars Limited

TITLE: None

ATTACHMT: ATTACHED TO LETTERS DATED 6/30/94 AND 8/9/94 FROM TREVOR BUTTLE TO JOHN WOMACK

TEXT: This responds to your letters concerning the F1 road car manufactured by your company. The F1 has a unique seating configuration, with the driver's seat located at the longitudinal centerline of the vehicle. The vehicle also has two passenger seats, lo cated on each side of the driver's seat, with the seating reference points for the passenger seats located 320 mm rearward of the driver's seating reference point. You stated that the driver's seat is fitted with a four-point harness (which you say is n ot a Type 1 or Type 2 belt), while the passenger seats both have three-point, Type 2 belts. You are considering importing the car into the United States and asked whether the restraint systems installed in the vehicle meet the requirements of Federal Mo tor Vehicle Safety Standard No. 208, Occupant Crash Protection. As explained below, the restraint system installed at the driver's seat may comply with the requirements of Standard No. 208, but the restraint systems installed at the passenger seats do n ot.

By way of background information, the National Highway Traffic Safety Administration (NHTSA) is authorized under Title 49, Chapter 301 of the U.S. Code to issue Federal Motor Vehicle Safety Standards that set performance requirements for new motor vehicl es and new items of motor vehicle equipment. NHTSA does not approve or certify any vehicles or items of equipment, as is the practice in Europe. Instead, Chapter 301 establishes a "self-certification" process under which each manufacturer is responsible for certifying that its products meet all applicable safety standards. The agency periodically tests new vehicles and items of equipment for compliance with the standards.

One of the standards established by NHTSA, Standard No. 208, requires seat belts to be installed at all designated seating positions in all passenger cars. The F1 road car would be subject to these requirements. Different belt installation requirements apply depending on the seating position within the vehicle and the date of manufacture. For passenger cars manufactured on or after September 1, 1989, but before September 1, 1996, Standrad No. 208 requires automatic crash protection at every front out board seating position, Type 2 belts at every forward facing rear outboard designated seating position, and a Type 1 or Type 2 seat belt assembly at every other seating position.

Thus, to determine what type of occupant protection is required at each of the seating positions in the F1 road car, it is necessary to determine how each of the seating positions would be categorized. An "outboard designated seating position" is define d in 49 CFR @ 571.3 as "a designated seating position where a longitudinal vertical plane tangent to the outboard side of the seat cushion is less than 12 inches from the innermost point on the inside surface of the vehicle at a height between the design H-point and the shoulder reference point . . . and longitudinally between the front and rear edges of the seat cushion." Based on the location of the two passenger seats, it appears that the driver's seat is located at least 12 inches from the side of t he vehicle and would not be considered an "outboard designated seating position." Therefore, Standard No. 208 requires a Type 1 or Type 2 seat belt assembly at the driver's seat in the F1 road car. If the four-point harness installed at the driver's sea t does not meet the requirements for one or the other of these two types of belts, the vehicle would not comply with Standard No. 208.

Standard No. 208, at S4.1.4.2(c), defines "rear outboard designated seating position," in relevant part as "any outboard designated seating position . . . that is rearward of the front seat(s). . ." We interpret this to mean that an outboard designated s eating position must be completely rearward of the front seat or seats in order to be considered a rear outboard designated seating position. Therefore, the two passenger seats in the F1 road car would be considered front outboard designated seating pos itions, and as such, would be required to provide automatic crash protection for the occupants. Automatic crash protection systems protect their occupants by means that require no action by vehicle occupants. Compliance with the automatic crash protect ion requirements of Standard No. 208 is determined in a dynamic crash test. That is, a vehicle must comply with specified injury criteria, as measured on a test dummy, in a 30 mph barrier crash test. The two types of automatic crash protection currentl y offered are automatic safety belts (which help to assure belt use) and air bags (which supplement safety belts and offer some protection even when safety belts are not used). Beginning with passenger cars manufactured on or after September 1, 1996, a new Federal requirement will be phased in making air bags accompanied by manual Type 2 seat belts mandatory.

Although Standard No. 208 does not require it, this agency strongly encourages you to provide an air bag for the F1's driver. In establishing Standard No. 208's automatic protection requirements and later amending the standard to require air bags, NHTSA anticipated that applying the requirements to the front outboard positions would result in all driver's seating positions being covered. The agency did not apply the requirements to the center seating position largely because that seating position is ra rely used. However, that would not be true if that position were also the driver's seating position. Especially since air bags will be provided for the drivers of all other passenger cars, we urge you to provide that same added protection for drivers o f the F1.

I note that NHTSA has procedures in 49 CFR Part 555 for temporarily exempting vehicles from our safety standards. These procedures may be used by small volume manufacturers such as McLaren to market vehicles that do not (or cannot) comply with the stand ards. For your convenience, I have enclosed a copy of Part 555.

I hope this information is helpful. If you have any further questions, please contact Edward Glancy of my staff at this address or by telephone at (202) 366-2992.