Field Evaluation of an Advance Brake Warning System Presented by Adhit Dhar and Cortlon Snyder.
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Transcript of Field Evaluation of an Advance Brake Warning System Presented by Adhit Dhar and Cortlon Snyder.
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Field Evaluation of an Advance Brake Warning System
Presented by Adhit Dhar and Cortlon Snyder
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Advanced Braking Warning systems (ABW) are devices installed on automobiles that will trigger a car’s brake lights before the driver will press the brake pedal.
What is ABW?
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PurposeThe purpose of this article is too study
the effects of a advanced brake light warning system.
The main goal of this article is to conclude whether or not the warning system is a driving hazard.
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Background SupportStudy regarding rear-end collisions
National Accident Sampling System (NHTSA, 1994)
Study of center high-mounted stop light(McKnight and Shinar, 1992) (Sivak, Post, and Olsen, 1981)
Study of reductions in rear-end collisions(Kahane, 1989)(Rausch, Wong, and Kirkpatrick, 1982)
Study on advanced brake warning system(Morrison, Swope, and Halcomb, 1986)(Olsen, 1988)
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Theoretical BasisThe theoretical basis is to study the
effects of the advanced braking warning system and its effects on safety. A study was performed to prove the system is not a driving safety hazard.
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Practical ContributionsA practical contribution this article
provides is proof that this system is not a safety hazard. Thus, if cost-feasible, it should be implemented in automobiles to reduce the number of rear-end collisions.
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Theoretical ContributionThis study could improve the design of
future automobiles if they are all built with ABW systems. In this case, it could lead to other studies regarding vehicle safety.
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Methodologies-Subjects aged 18-65 yrs, median age 38 yrs-743 trips made, averaging 83 km per trip-6 Community cars used with Advanced Brake Warning-Men made 80% of trips-Sensor placed on rod of gas pedal, attached to brake
lights-System initiates 2 minutes after car starts-Electronic event recorder installed behind dashboard5 Types of Events Recorded-Total number of braking actions-Total number of ABW activations-Number of braking actions < 1 s (brief braking actions)-Number of ABW activations followed by braking within 1
s-Number of ABW activations followed by brief braking (<
1 s) within 1 s
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Statistical Analysis-Total brake applications and # of brief
brakes (braking for < 1 s) correlated highly with km driven, with r = 0.96 and r = 0.89 for each, respectively
-But, correlations between km driven and abrupt braking triggering ABW + brakes was only 0.34, and not significant at p < 0.05 (2 readings from each car)
-Correlation between total braking actions and ABW + brakes failed to reach statistical significance at r = 0.34
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Presentation of Results-6 vehicles driven for a total of 61,668 km
and generated 95,394 brake applications
-820 brake applications were abrupt enough to activate ABW system (0.9%)
-ABW activation followed by brake application occurred at a rate of 13.3 times per 1,000 km
-False alarms occur at a rate of 23%, or 4 times per every 1000 km traveled
-Brief braking occurred at a rate of 167 times per 1,000 km
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Reasonable ConclusionsABW system does not appear to pose a
safety hazard, and can benefit rather than harm traffic safety due to the fact that:
-With brief braking actions occurring 167 times per 1000 km, false alarms are very rare
-In normal course of driving, ABW system would activate brake lights without braking occurring only once out of 50 times
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Future Work/ResearchExperiment leads to many possibilities:
-More females subjects can be tested in a new study
-Stopping distance can be recorded for trailing cars under many different scenarios
-Experiment can be run in a more rigorous setting like the NASCAR circuit