Interpretation ID: nht93-4.20

DATE: June 3, 1993

FROM: David L. Degenstein -- Manager, Product Safety & Compliance, Kenworth Truck Company

TO: John Womack -- Acting Chief Counsel, NHTSA

TITLE: None

ATTACHMT: Attached to letter dated 9/7/93 from John Womack to David Degenstein (A41; Std. 101)

TEXT:

Kenworth Truck Company, a manufacturer of heavy duty Class 7 and 8 trucks and truck tractors, respectfully submits the following request for interpretation of Federal Motor Vehicle Safety Standard (FMVSS) No. 101, Controls and Displays.

FMVSS 101 specifies requirements for the location, identification, and illumination of motor vehicle controls and displays. One of the vehicle controls regulated by this standard is the automatic vehicle speed system, or cruise control.

Kenworth is in the process of developing a new product that will locate a cruise control switch in a console that is attached to the manual transmission shift lever, adjacent to the shift knob (see the attached photographs). One switch in the console will control the SET and RESUME functions of the cruise control, and the other switches will control the engine brake. The switches are operable by the driver, and the identification is visible to the driver in accordance with S5.1 of Standard No. 101; therefore, Kenworth believes this location to be in compliance. For your information, the switch which controls the ON and OFF function of the cruise control will remain located on the dash panel. Of course, while operating, the cruise control can be disengaged by depressing the brake, or clutch pedal.

Illumination requirements for control identifications are specified in S5.3, and listed in Table 1(a), column 4, of Standard No. 101. Accordingly, Automatic - Vehicle Speed control (cruise control) is listed on Table 1(a) and accompanied by the word "yes" under column 4, indicating illumination is required whenever the headlights are activated. Exception to the illumination requirement is allowed provided the control is mounted to the floor, floor console, or steering column.

Kenworth requests an interpretation regarding the applicability of the illumination requirement to a transmission shift lever mounted cruise control switch. Kenworth believes this cruise control switch location is similar, relative to driver's accessibility and visibility of the control, to an automobile switch located on a floor console, and therefore, illumination should not be necessary or required.

Please confirm that our proposed location for a cruise control switch does not require illumination, and that the location complies with FMVSS No. 101.

We look forward to hearing from you concerning our request. In the meantime, if you have any questions or need additional information, please do not

hesitate to contact me.

(Attached photos and drawing omitted.)