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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/19150

Title: Drivers' behavioral responses to combined speed and red light cameras
Authors: Polders, Evelien
Cornu, Joris
De Ceunynck, Tim
Daniels, Stijn
Brijs, Kris
Brijs, Tom
Hermans, Elke
Wets, Geert
Issue Date: 2015
Abstract: Background: Numerous signalized intersections worldwide have been equipped with enforcement cameras in order to tackle red light running and often also to enforce speed limits. However, various impact evaluation studies of red light cameras (RLCs) showed an increase of rear-end collisions (up to 44%). Objective: The principal objective of this study is to provide a better insight in possible explaining factors for the increase in rear-end collisions that is caused by placing combined speed and red light cameras (SRLCs). Method: Real-world observations and driving simulator-based observations are combined. Video recordings at two signalized intersections where SRLCs were about to be installed are used to analyze rear-end conflicts, interactions and driver behavior in two conditions (i.e., with and without SRLC). Furthermore, one of these intersections was rebuilt in a driving simulator equipped with an eye tracking system. At this location, two test conditions (i.e., SRLC and SRLC with a warning sign) and one control condition (i.e., no SRLC) are examined. The data of 63 participants were used to estimate the risk of rear-end collisions by means of a Monte Carlo Simulation. Results: The results of the on-site observation study reveal decreases in the number of red and yellow light violations, a shift (i.e., closer to the stop line) in the dilemma zone and a time headway reduction after the installation of the SRLC. Based on the driving simulator data, the odds of rear-end collisions (compared to the control condition) for the conditions with SRLC and SRLC+ warning sign is 6.42 and 4.01, respectively. Conclusion: The real-world and driving simulator observations indicate that the risk of rear-end collisions increases when SRLCs are installed. However, this risk might decrease when a warning sign is placed upstream. (C) 2015 Elsevier Ltd. All rights reserved.
Notes: [Polders, Evelien; Cornu, Joris; De Ceunynck, Tim; Daniels, Stijn; Brijs, Kris; Brijs, Tom; Hermans, Elke; Wets, Geert] Hasselt Univ, Transportat Res Inst, BE-3590 Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/19150
DOI: 10.1016/j.aap.2015.05.006
ISI #: 000357548800016
ISSN: 0001-4575
Category: A1
Type: Journal Contribution
Validation: ecoom, 2016
Appears in Collections: Research publications

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