This content is not included in your SAE MOBILUS subscription, or you are not logged in.
An Improved Braking Indicator
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1989 by SAE International in United States
Annotation ability available
Conventional brake lights require 250 msec to reach 90% intensity, thereby causing potentially important delays of warning information to following drivers. Several improvements are possible, including the use of LED displays. LED's, however, are more expensive than conventional incandescent bulbs and require redesign of lamp housings. As an alternative, we have designed a simple and relatively inexpensive circuit that produces a faster warning signal using a conventional bulb. We have evaluated the benefits of this device in a laboratory study that measured subjects' reaction times to the onset of brake lights in a simulated car-following situation. Our data indicate that the benefit of the device is on the order of 115 msec. For a vehicle traveling at 65 miles per hour, that benefit translates to a decrease in stopping distance of 11 feet.
|Technical Paper||New Automotive Applications for Liquid Crystal Displays|
|Technical Paper||Heads Up Display|
CitationFlannagan, M. and Sivak, M., "An Improved Braking Indicator," SAE Technical Paper 890189, 1989, https://doi.org/10.4271/890189.
- Swets J. A. 1964 Signal detection and recognition by human observers New York Wiley
- Sivak M. Post D.V. Olson P.L. 1981 Driver responses to high-mounted brake lights in actual traffic Human Factors 23 231 235
- Yantis S. Jonides J. 1984 Abrupt visual onsets and selective attention: evidence from visual search Journal of Experimental Psychology: Human Perception and Performance 10 601 621