Influence of road markings, lane widths and driver behaviour on proximity and speed of vehicles overtaking cyclists

Shackel, S. C. and Parkin, J. (2014) Influence of road markings, lane widths and driver behaviour on proximity and speed of vehicles overtaking cyclists. Accident Analysis & Prevention, 73. pp. 100-108. ISSN 0001-4575 Available from:

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The proximity and speed of motor traffic passing cyclists in non-separated conditions may be so close and so great as to cause discomfort. A variety of road design and driver behaviour factors may affect overtaking speeds and distances. The investigation presented in this paper builds on previous research and fills gaps in that research by considering the presence of cycle lanes on 20 mph and 30 mph roads, different lane widths, different lane markings, vehicle type, vehicle platooning and oncoming traffic. Data were collected from a bicycle ridden a distance of one metre from the kerb fitted with an ultrasonic distance detector and forward and sideways facing cameras. Reduced overtaking speeds correlate with narrower lanes, lower speed limits, and the absence of centre-line markings. Drivers passed slower if driving a long vehicle, driving in a platoon, and when approaching vehicles in the opposing carriageway were within five seconds of the passing point. Increased passing distances were found where there were wider or dual lane roads, and in situations where oncoming vehicles were further away and not in a platoon. In mixed traffic conditions, cyclists will be better accommodated by wider cross-sections, lower speed limits and the removal of the centre-line marking.

Item Type:Article
Additional Information:NOTICE: this is the author’s version of a work that was accepted for publication in Accident Analysis & Prevention. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Accident Analysis & Prevention, [100, (December 2014)] DOI: 10.1016/j.aap.2014.08.015
Uncontrolled Keywords:bicycle, lane markings, lane widths, overtaking speed, overtaking proximity
Faculty/Department:Faculty of Environment and Technology > Department of Geography and Environmental Management
ID Code:23922
Deposited By: Professor J. Parkin
Deposited On:25 Sep 2014 10:21
Last Modified:22 Aug 2016 19:02

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