Interpretation ID: 9146
600 Ridgely Avenue, Suite 130
Annapolis, MD 21401
Dear Dr. Wells:
Thank you for your letter describing a device you called an "Emergency Brake Technology" (E.B.T.) system that you believe would eliminate jackknifing and improve the stopping distances of tractor trailers. A video tape accompanying your letter stated that the E.B.T. system operates by having a metal wedge slide below each wheel in response to an action by the driver. You requested the opportunity to testify or submit written comments about the benefits of this device. You also requested that the agency test the E.B.T. system.
As Marvin Shaw of my staff explained to you, NHTSA issued a notice of proposed rulemaking (NPRM) on September 28, 1993, that addresses the lateral stability and control of medium and heavy vehicles. The agency is proposing to require these vehicles to be equipped with an antilock brake system (ABS) and to comply with a 30 mph braking-in-a-curve test on a low coefficient of friction surface. Mr. Shaw advised you that while the agency does not anticipate holding a public hearing on this rulemaking, you could submit written comments to the NPRM. In addition, we have submitted this correspondence, including your incoming letter and the video tape, to the public docket.
We regret that we are unable to fulfill your request for NHTSA to test the E.B.T. system. Given our limited research budget, it is not possible for us to test every automotive safety- related piece of equipment that is introduced into the marketplace.
I hope this information is helpful. If you have any further questions about NHTSA's activities, please feel free to contact Marvin Shaw at this address or by telephone at (202) 366-2992. Sincerely,
John Womack Acting Chief Counsel ref:121 d:11/30/93