Effects of driver-side mirror type on lane-change accidents

Juha Luoma, M. Sivak, M. Flannagan

Research output: Contribution to journalReview ArticleScientific

9 Citations (Scopus)

Abstract

This quasi-experiment was designed to investigate the effects of the type of driver-side mirror on lane-change accidents.
The analysis was based on 407 accidents reported from 1987 to 1992 to Finnish insurance companies, for vehicles with passenger-side convex mirrors and one of three types of driver-side mirrors (flat, convex or multiradius).
The results showed that there was no difference between the multiradius and convex mirrors in the frequencies of lane-change accidents to the left. Compared to the flat mirror, the mean effect of the multiradius and convex mirror was a 22% decrease. However, the statistical strength of the data was low; 95% confidence interval ranged from a 51% decrease to a 25% increase. This result was not related to driver characteristics or driving conditions.
In conclusion, the multiradius and convex driver-side mirrors, in comparison to the flat mirror, are more likely to reduce than increase lane-change accidents. A theoretical implication of this study is that minimizing the blind spot is likely to be more important than providing an undistorted image of objects.
From a practical point of view, the present findings support the use of multiradius and convex driver-side mirrors.
Original languageEnglish
Pages (from-to)1973-1978
JournalErgonomics
Volume38
Issue number10
DOIs
Publication statusPublished - 1995
MoE publication typeB1 Article in a scientific magazine

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Accidents
Mirrors
accident
driver
Optic Disk
Insurance
insurance company
Theoretical Models
Confidence Intervals
confidence
experiment
Industry
Experiments

Cite this

Luoma, Juha ; Sivak, M. ; Flannagan, M. / Effects of driver-side mirror type on lane-change accidents. In: Ergonomics. 1995 ; Vol. 38, No. 10. pp. 1973-1978.
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title = "Effects of driver-side mirror type on lane-change accidents",
abstract = "This quasi-experiment was designed to investigate the effects of the type of driver-side mirror on lane-change accidents. The analysis was based on 407 accidents reported from 1987 to 1992 to Finnish insurance companies, for vehicles with passenger-side convex mirrors and one of three types of driver-side mirrors (flat, convex or multiradius). The results showed that there was no difference between the multiradius and convex mirrors in the frequencies of lane-change accidents to the left. Compared to the flat mirror, the mean effect of the multiradius and convex mirror was a 22{\%} decrease. However, the statistical strength of the data was low; 95{\%} confidence interval ranged from a 51{\%} decrease to a 25{\%} increase. This result was not related to driver characteristics or driving conditions. In conclusion, the multiradius and convex driver-side mirrors, in comparison to the flat mirror, are more likely to reduce than increase lane-change accidents. A theoretical implication of this study is that minimizing the blind spot is likely to be more important than providing an undistorted image of objects. From a practical point of view, the present findings support the use of multiradius and convex driver-side mirrors.",
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Luoma, J, Sivak, M & Flannagan, M 1995, 'Effects of driver-side mirror type on lane-change accidents', Ergonomics, vol. 38, no. 10, pp. 1973-1978. https://doi.org/10.1080/00140139508925244

Effects of driver-side mirror type on lane-change accidents. / Luoma, Juha; Sivak, M.; Flannagan, M.

In: Ergonomics, Vol. 38, No. 10, 1995, p. 1973-1978.

Research output: Contribution to journalReview ArticleScientific

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AB - This quasi-experiment was designed to investigate the effects of the type of driver-side mirror on lane-change accidents. The analysis was based on 407 accidents reported from 1987 to 1992 to Finnish insurance companies, for vehicles with passenger-side convex mirrors and one of three types of driver-side mirrors (flat, convex or multiradius). The results showed that there was no difference between the multiradius and convex mirrors in the frequencies of lane-change accidents to the left. Compared to the flat mirror, the mean effect of the multiradius and convex mirror was a 22% decrease. However, the statistical strength of the data was low; 95% confidence interval ranged from a 51% decrease to a 25% increase. This result was not related to driver characteristics or driving conditions. In conclusion, the multiradius and convex driver-side mirrors, in comparison to the flat mirror, are more likely to reduce than increase lane-change accidents. A theoretical implication of this study is that minimizing the blind spot is likely to be more important than providing an undistorted image of objects. From a practical point of view, the present findings support the use of multiradius and convex driver-side mirrors.

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