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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
Michael R. Williamson1, Ryan N. Fries2, Yan Qi2, and Praveen Mandava2
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DOI:10.17265/2328-2142/2018.02.002
Affiliation(s)
1. Department of Civil Engineering, Indiana State University, Terre Haute, IN 47809-1902, USA
2. Department of Civil Engineering, Southern Illinois University Edwardsville, Campus Box 1800 Edwardsville, IL 62026-1800, USA
ABSTRACT
The safety impact of changes to roadway operations have been of
interests in recent years with the publication of the Highway Safety Manual. One area that is in need of further study is the safety impact of traffic
signal coordination projects in urban areas. Specifically, this study seeks to
identify the safety benefit from traffic signal coordination projects on major
arterial roadways through urban areas using a before and after study with a
comparison groups approach and a meta-analysis method.
The findings suggest that traffic signal coordination could decrease total
crashes by 21 percent, injury
crashes by 52 percent and
property-damage-only crashes by 21 percent. The results can be utilized by engineering practitioners to estimate the safety benefits for projects that seek to coordinate traffic signals
along an urban corridor. Because these projects can both improve the safety of
roadways while improving traffic flow, the application of these findings could
be broad.
KEYWORDS
Traffic safety, traffic signal optimization, traffic signal coordination, meta-data analysis, crash modification factors.
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