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Interpretation ID: nht73-2.30

DATE: 12/26/73

FROM: DARROLL P. YOUNG -- PRESIDENT YOUNG'S MACHINE COMPANY

TO: OFFICE OF CHIEF COUNCIL NHTSA U.S. DEPT OF TRANSPORTATION

TITLE: NONE

ATTACHMT: ATTACHED TO LETTER DATED 1/8/74 FROM RICHARD B. DVSON -- NHTSA TO DARRELL P. YOUNG -- PRESIDENT YOUNG'S MACHINE COMPANY

TEXT: We are manufacturers of Diesel powered underground mine trucks. These vehicles utilize truck differential having hydraulic brakes. Most of the vehicles have two wheel drive, and in such cases have brakes only on the driving axles.

The maximum speed attainable under full power is approximately 12 miles per hour. The vehicles are not designed to operate on highways or public roads.

Kindly supply us with regulations number 121 and 105A in order that we may determine our responsibility as regards compliance with the above regulations.

Thank you very much.

Very truly yours,