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Estimating Safety Effects of Green-Man Countdown Devices at Signalized Pedestrian Crosswalk Based on Cellular Automata
Joint Authors
Wong, Yiik Diew
Chai, Chen
Shi, Xiupeng
Source
Journal of Advanced Transportation
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-06-07
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Safety effects of Green-Man Countdown Device (GMCD) at signalized pedestrian crosswalks are evaluated.
Pedestrian behavior at GMCD and non-GMCD crosswalks is observed and analyzed.
A microsimulation model is developed based on field observations to estimate safety performance.
Simulation outputs allow analysts to assess the impacts of GMCD at various conditions with different geometric layout, traffic and pedestrian volumes, and the green time.
According to simulation results, it is found that the safety impact of GMCD is affected by traffic condition as well as different time duration within green-man signal phase.
In general, GMCD increases average walking velocity, especially during the last few seconds.
The installation of GMCD improves safety performance generally, especially at more crowded crossings.
Conflict severity is increased during last 10 s after GMCD installation.
Findings from this study suggest that the current practice, which is to install GMCD at more crowded crosswalks or near the school zone, is effective.
Moreover, at crosswalks with GMCD, longer all red signal phase is suggested to improve pedestrian safety during intergreen period.
American Psychological Association (APA)
Chai, Chen& Shi, Xiupeng& Wong, Yiik Diew. 2017. Estimating Safety Effects of Green-Man Countdown Devices at Signalized Pedestrian Crosswalk Based on Cellular Automata. Journal of Advanced Transportation،Vol. 2017, no. 2017, pp.1-13.
https://search.emarefa.net/detail/BIM-1171023
Modern Language Association (MLA)
Chai, Chen…[et al.]. Estimating Safety Effects of Green-Man Countdown Devices at Signalized Pedestrian Crosswalk Based on Cellular Automata. Journal of Advanced Transportation No. 2017 (2017), pp.1-13.
https://search.emarefa.net/detail/BIM-1171023
American Medical Association (AMA)
Chai, Chen& Shi, Xiupeng& Wong, Yiik Diew. Estimating Safety Effects of Green-Man Countdown Devices at Signalized Pedestrian Crosswalk Based on Cellular Automata. Journal of Advanced Transportation. 2017. Vol. 2017, no. 2017, pp.1-13.
https://search.emarefa.net/detail/BIM-1171023
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1171023