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Stability in drivers' speed choice
Affiliation:1. Centre for Public Safety, Karlstad University, Sweden;2. Department of Environmental and Life Sciences, Karlstad University, Sweden;3. Department Health Sciences, Karlstad University, Sweden;1. INRA, UR50, Laboratoire de Biotechnologie de l''Environnement, Avenue des Etangs, Narbonne, F-11100, France;2. Naskeo Environnment, 52 rue Paul Vaillant Couturier, F-92240 Malakoff, France;1. The George Institute for Global Health, Sydney Medical School, The University of Sydney, GPO Box 5389, Sydney, NSW 2001, Australia;2. Safer Roads Consulting, 53 Lachlan St, Thirroul, NSW 2515, Australia;3. Kolling Institute of Medical Research, Sydney Medical School, The University of Sydney, Level 10, Kolling Building 6, Royal North Shore Hospital, St Leonards, NSW 2065, Australia;4. The Centre for Road Safety, Transport for NSW, Level 3, 84 Crown St, Wollongong, NSW 2500, Australia;5. School of Science and Health, Western Sydney University, Narellan Road Campbelltown, NSW 2560, Australia;6. Neuroscience Research Australia (NeuRA), Margarete Ainsworth Building, Barker St, Randwick, NSW 2031, Australia;1. U.S. EPA, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Atlantic Ecology Division, 27 Tarzwell Drive, Narragansett, RI 02882, USA;2. University of Wisconsin-Madison, 7187 H.C. White Hall, 600 N. Park St., Madison, WI 53706, USA;1. CDV – Transport Research Centre, Líšeňská 33a, 63600 Brno, Czech Republic;2. Graduate Institute of Injury Prevention and Control, College of Public Health, Taipei Medical University, 250 Wuxing Street, Taipei City 110, Taiwan
Abstract:Repeated speed measurements were obtained to examine drivers' consistency in speed choice. Drivers were observed at two locations along a route or for two days at the same location. Single carriageway roads were used with posted speed limits of 70 and 90 km/h. Correlation coefficients between repeated speed measures ranged from .49 to .81 for free-flowing vehicles. Higher consistency between measures was found where segments of the road were homogenous. Consistency in relation to speed limit varied as a function of roads and direction of travel. From 4% to 41% of the drivers observed legal speeds at both sites and between 43% and 100% travelled over the speed limits at both sites. The results are discussed in terms of using self-reported speed in driver surveys and modelling of driver behaviour.
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