Investigating roundabout properties and bicycle accident occurrence at Swiss roundabouts: A logistic regression approach
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Publication date
2019
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01A - Journal article
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Parent work
ISPRS International Journal of Geo-Information
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Volume
8
Issue / Number
2
Pages / Duration
95
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MDPI
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Abstract
The positive effects of active mobility on mental and physical health as well as on air quality are widely acknowledged. Increasing the share of active travel is therefore an aim in many countries. Providing bicycle-safe infrastructure is one way to promote cycling. Roundabouts are a common traffic infrastructure and are supposed to facilitate safe and smooth traffic flow. However, data on road traffic accidents indicate an over-proportional involvement of cyclists in accidents at roundabouts. In the present study, the influence of roundabout geometry and traffic flow on bicycle accident occurrence was investigated using a logistic regression approach on twelve parameters of N = 294 mostly small- and mini-sized single-lane roundabouts in the Canton of Berne, Switzerland. Average weekday motorized traffic was identified as a major factor in explaining bicycle accident occurrence at roundabouts. Further, the radius of the central island, the location of the roundabout (in town vs. out of town) and the number of legs were significantly related to bicycle accident occurrence. While these results are in general agreement with findings from similar studies, the findings regarding the central island’s radius and the number of legs underpin the need for roundabout type-specific studies: Some parameters may not prove relevant in intermediate- to large-sized roundabouts, but become critical in small or mini roundabouts, which are common in Switzerland and numerous in the present sample.
Keywords
Logistic regression, Roundabout, Bicycle, Accident analysis
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ISBN
ISSN
2220-9964
Language
English
Created during FHNW affiliation
Yes
Strategic action fields FHNW
Publication status
Published
Review
Peer review of the complete publication
Open access category
Gold
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Citation
Hollenstein, D., Hess, M., Jordan, D., & Bleisch, S. (2019). Investigating roundabout properties and bicycle accident occurrence at Swiss roundabouts: A logistic regression approach. ISPRS International Journal of Geo-Information, 8(2), 95. https://doi.org/10.3390/ijgi8020095