Interpretation ID: nht92-6.37

DATE: May 26, 1992

FROM: Steven Henderson -- Department of Psychology, McGill University

TO: Howard Smolkin -- Acting Administrator, NHTSA

TITLE: None

ATTACHMT: Attached to letter dated 6-28-93 from John Womack to Steven Henderson (A41; Std. 108).

TEXT: My name Steven Henderson. I am PhD student in the Department of Psychology a McGill University, where I am studying visual perception. My coinventor David Kernaghan and I have designed, built and filed a patent application for a horn-activated headlight/signallight flasher system that enables motorcyclists to temporarily make themselves more conspicuous to other drivers. I have enclosed the patent application for your information. The U.S. Patent Office has granted claims 1-3 and 7-9 in their first response. Claims 4-6 were contained in a more recently submitted continuation in part (CIP).

The horn flasher is used in the following manner. When a motorcyclist becomes aware that another vehicle is about to encroach on his or her path of travel, a push of the motorcycle's horn button causes the headlight and signal lights to flash 10 times per second. (Ten hz is the frequency to which the human eye is most sensitive.) The flickering light in the car driver's visual periphery will immediately cause him or her to flexively fixate the motorcycle's location. By being made aware of the motorcycle's presence, the car driver is prevented from causing an accident. Our hope is that this invention will help to avert some of the approximately three thousand fatalities suffered annually by motorcyclists in North America.

I have exchanged correspondence with Mr. Paul Jackson Rice, Chief Council, NHTSA, concerning the application of DOT Standard No. 108 to our device. I have found his recommendations to be invaluable to our efforts to modify the device to more closely comply with the standard. However, as the invention was not envisioned when the standard was initially written, our device appears not to be in compliance with S5.5.10(c) and (d), and S5.6 of the standard. In his letter of August 28, 1992, Mr. Rice recommends the following:

The agency shares your concern with improving the detectability of motorcycles and their riders ... You may petition the agency for rulemaking to amend Standard No. 108 in a manner that would allow your device. A petition must set forth facts which it is claimed establish that a change in the standard is necessary, and a brief description of the changes which should be made. This means that you should show how your device is expected to improve safety, or, at a minimum, not decrease the existing level of safety.

Accordingly, I am acting on Mr. Rice's suggestion, and have enclosed a petition requesting that the agency for rulemaking amend Sections S5.5.10 and S5.6 of Standard No. 108 in order to permit the use of our device. I have also enclosed the U.S patent application submitted for the device. (On the advice of Mr. Rice, the circuit has been modified so that if the horn button is pressed while signalling for a turn, the appropriate signal light flickers at 2 hz, as required by SAE J590, rather than emitting 2 hz bursts of 10 hz flicker,

as does the unmodified circuit. Please also note that the tail light is always steady-burning, as required by Section S5.5.10(d).

As I state in the enclosed petition, I feel very strongly that our device furthers the purpose of Standard No. 108 as stated in Section S2, as it will:

reduce traffic accidents and deaths and injuries resulting from traffic accidents ... by enhancing the conspicuity of motor vehicles on the public roads so that their presence is perceived and their signals understood.

Furthermore, Section S5.5.10(b) illustrates an intent to allow a device similar to ours, by stating:

(b) Headlamps and side marker lamps may be wired to flash for signalling purposes.

I therefore request that you grant careful consideration to our petition to amend DOT Standard No. 108 so as to allow the use of our device.

Thank You.