A systematic review of definitions of motor vehicle headways in driver behaviour and performance studies |
| |
Institution: | 1. Transport and Road Safety (TARS) Research Centre, School of Aviation, University of New South Wales, Australia;2. School of Mathematics and Statistics, University of New South Wales, Australia;3. Centre for Accident Research and Road Safety – Queensland (CARRS-Q), Queensland University of Technology – QUT, Australia;1. Civil and Environmental Engineering, University of Tennessee, Knoxville, TN, United States;2. Norwegian University of Science and Technology, Department of Psychology, Norway;1. School of Mechanical System Engineering, Nippon Institute of Technology, 4-1 Gakuendai, Miyashiro, Saitama 3458501, Japan;2. Faculty of Engineering, Hokkaido University, North 13, West 8, Sappporo, Hokkaido 0608628, Japan;1. Queensland University of Technology, Centre for Accident Research and Road Safety – Queensland (CARRS-Q), Institute for Health and Biomedical Innovation, Brisbane, Australia;2. School of Criminology and Criminal Justice and Griffith Criminology Institute, Griffith University, Brisbane, Australia |
| |
Abstract: | Headway is a safety measure commonly used to investigate driving behaviour and driver performance. Its purpose is to reflect the following distance or time between a leading and following vehicle in traffic. It is therefore associated with drivers’ response time, such as in braking or swerving, during safety critical events. In the literature, distance and time headway are defined in different ways, despite standard definitions in the traffic engineering literature, which prompted this systematic review of headway definitions across a range of study designs, in order to recommend approaches to improve the accuracy and reproducibility of headway definitions used in road safety contexts. PRISMA guidelines were followed to search four databases (EMBASE, COMPENDEX, SCOPUS and MEDLINE) for studies that reported on headways or discussed methodological approaches. The search and filtering of abstracts identified 110 articles for a qualitative synthesis. Four broad approaches to measuring headways were detected: studies using simulation, roadside external features, on-road features, and on-vehicle features. Studies were coded as to whether they included written explanation, mathematical statements, or pictorial depictions of headway. Only 49.6% of studies contextualised headway sufficiently for reproducibility. Reproducibility is crucial for accurate interpretation of research findings and comparisons across studies. It is recommended that headway definitions should a) exclude vehicle or parts of vehicle lengths, b) include reference points (e.g., bumper/axle/rear), c) have a consistent terminology, and d) include the accuracy of headway measuring devices to report the precision of a study’s findings. |
| |
Keywords: | Time headway Distance gap Time to collision Car following Rear-end crash |
本文献已被 ScienceDirect 等数据库收录! |
|