Interpretation ID: aiam1125
Diamond Reo Trucks
Inc.
1331 S. Washington
Lansing
MI 48920;
Dear Mr. Schuppert: By petition of March 16, 1973, Diamond Reo requested the Nationa Highway Traffic Safety Administration to delay implementation of Motor Vehicle Safety Standard No. 121, *Air Brake Systems*, with respect to certain categories of large capacity trucks with high centers of gravity.; We are uncertain from your petition as to the defining characteristic of the vehicles that you would have us temporarily exempt from the standard. We are also uncertain as to the magnitude of the problem that is being encountered by the vehicles in question: there would seem to be a problem with high speed stops, but there are no indications as to whether the parking brakes and other required systems also present difficulties.; After considering the request, which asks relief from all provisions o the standard, the agency has concluded that an exception of such magnitude is not warranted and therefore denies the request. The agency makes no finding as to whether more limited relief may be appropriate, and does not consider the denial of the March 16 request to preclude the company from submitting petitions for relief from specific aspects of the standard.; Sincerely, James E. Wilson, Associate Administrator, Traffic Safet Programs;