Crash risk evaluation of aggressive driving on motorways: Microscopic traffic simulation approach |
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| Affiliation: | 1. Hanyang University Erica Campus, Department of Transportation and Logistics Engineering, 55 Hanyangdaehak-ro, Sangnok-gu, Ansan 15588, Republic of Korea;2. Korea Railroad Research Institute, Future Transport Policy Research Division, 176 Railroad Museum Road, Uiwang-si, Gyeonggi-do 16105, Republic of Korea;1. Department of Construction Management, Louisiana State University, United States;2. Department of Civil, Environmental, and Geo-engineering, University of Minnesota, United States;3. Department of Civil and Architectural Engineering, University of Wyoming, United States;4. Department of Civil, Architectural and Environmental Engineering, University of Texas at Austin, United States;1. Civil Engineering and Built Environment School, Queensland University of Technology, 2 George St. GPO Box 2434, Brisbane, QLD 4001, Australia;2. Centre for Accident Research and Road Safety (CARRS-Q), Faculty of Health and Civil Engineering and Built Environment, Science and Engineering Faculty, Queensland University of Technology, 2 George St. GPO Box 2434, Brisbane, QLD 4001, Australia;1. Department of Civil and Environmental Engineering, University of Utah, Salt Lake City, UT 84112, USA;2. Armstrong Forensic Engineers Austin, TX 78757, USA;3. Department of Civil and Environmental Engineering, Arizona State University, Phoenix, AZ 85004, USA |
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| Abstract: | This paper provides quantitative evaluation of safety implications of aggressive driving (speeding, following closely and weaving through traffic) by using microscopic traffic simulation approach. Combination of VISSIM and Surrogate Safety Assessment Model (SSAM) were used to model motorway and assess safety of the simulated vehicle. The use of vehicle conflicts was validated by correlating it to historic crashes. Crash risk, severity levels and the magnitude of the perceived benefits of aggressive driving were quantified relative to normal drivers under two scenarios: (1) congested, and (2) non-congested traffic conditions. Involvement in vehicle conflicts is used to determine crash-risk while reductions in Post Encroachment Time (PET) and travel time were used to determine the severity levels of the expected crashes and the magnitude of the perceived benefits. The results indicated that the crash risk of aggressive drivers was found to be in the range 3.10–5.8 depending on traffic conditions and type of road aggression. PET of the conflicts involving aggressive drivers reduced by 7–61% indicating high severity levels of the expected crashes. Moreover, the magnitude of the perceived benefit in terms of reduction in travel time was found to be as little as 1–2%. The study concluded that aggressive driving is entailed with a massive risk while its benefits are actually very little. |
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| Keywords: | Aggressive driving Crash risk Odds ratio Surrogate Safety Assessment Measures SSAM VISSIM |
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