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Rethinking false alarms by automotive active safety systems
Linköping University, Department of Computer and Information Science. Linköping University, The Institute of Technology.
2011 (English)In: Ergonomics, ISSN 0014-0139, E-ISSN 1366-5847Article in journal (Other academic) Submitted
Abstract [en]

In this paper I address the issue of false alarms as they relate to the development of automotive active safety systems. I argue that false alarms are not only unavoidable; they should be considered an integral part of the design of active safety systems that address potential accident situations. Accidents are rare. Hence the base rate of true alerts will also be rare. This fact has two undesirable consequences if designers strive to eliminate all false alarms. First, the few true alerts would be so rare that the driver’s reaction can not be expected to be efficient. Second, the few issued alerts would be insufficient in number to enable drivers to calibrate trust in the system. I suggest that it is more prudent to acknowledge that there will be false alarms and focus on achieving driver acceptance for the issued alerts. We can take advantage of the drivers’ subjective perception of potential accident situations to guide the specification of the system’s alerting criteria. Such systems are likely to achieve higher driver acceptance.

Place, publisher, year, edition, pages
2011.
Keyword [en]
false alarms; active safety systems; alert acceptance; driver behaviour; low base rate accidents
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-68103OAI: oai:DiVA.org:liu-68103DiVA: diva2:416277
Available from: 2011-05-11 Created: 2011-05-11 Last updated: 2017-12-11Bibliographically approved
In thesis
1. Using False Alarms when Developing Automotive Active Safety Systems
Open this publication in new window or tab >>Using False Alarms when Developing Automotive Active Safety Systems
2011 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis develops and tests an empirical method to quantifying drivers’ level of acceptance for alerts issued by automotive active safety systems. The method uses drivers’ subjective level of acceptance for alerts that are literally false alarms as a measure to guide the development of alerting criteria that can be used by active safety systems. Design for driver acceptance aims at developing systems that overcome drivers’ dislike for false alarms by issuing alerts only when drivers finds them reasonable and therefore are likely to accept them. The method attempts to bridge the gap between field experiments with a high level of ecological validity and lab based experiments with a high level of experimental control. By presenting subjects with video recordings of field data (e.g., traffic incidents and other situations of interest), the method retains high levels of both experimental control and ecological validity.

This thesis first develops the theoretical arguments for the view that false alarms are not only unavoidable, but also that some false alarms are actually useful and, hence, desirable as they provide useful information that can be used (by the proposed method) to assess driver acceptance of active safety systems. The second part of this thesis consists of a  series of empirical studies that demonstrates the application of the assessment method. The three empirical studies showed that drivers’ subjective level of acceptance for alerts that are literally false alarms are a useful measure that can guide system designers in defining activation criteria for active safety systems. The method used to collect the driver’s subjective acceptance levels has also been shown to produce reliable and reproducible data that align with the view of the drivers who experienced the situations in the field. By eliciting responses from a large number of observers, we leverage the high cost of field data and generate sample sizes that are amenable to statistical tests of significance.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2011. 58 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1374
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-68109 (URN)978-91-7393-153-3 (ISBN)
Public defence
2011-05-26, Visionen, hus B,, Campus Valla, Linköpings universitet, Linköping, 13:15 (English)
Opponent
Supervisors
Available from: 2011-05-11 Created: 2011-05-11 Last updated: 2011-05-11Bibliographically approved

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