Document Type
Article
Publication Date
2016
DOI
10.22119/ijte.2016.16179
Publication Title
International Journal of Transportation Engineering
Volume
3
Issue
4
Pages
277-288
Abstract
Optimally minimizing delay times at signalized intersections can significantly improve both traffic flow and safety. However, most traffic flow optimizing tools do not measure the effect on safety. This study uses nonlinear programming (NLP) algorithms to optimally minimize delay times and employs both Safety performance functions (SPFs) and empirical Bayes (EB) before-after methodology to measure the impact on safety presented as a Crash Modification Factor (CMF). A crash modification factor (CMF) is a multiplicative factor used by transportation practitioners to compute the expected number of crashes at specific study site(s) after a countermeasure has been proposed or is implemented. Using 2013 traffic data from seventeen signalized intersections located in Virginia Beach, the results show that optimally minimizing intersection delay times can result in a safety improvement of approximately 26.46% that is a CMF of 0.735. This result is not conclusive, but the significance of the findings shows the need for further investigations and potential inclusion in the future editions of the Highway Safety Manual (HSM).
Rights
© The Authors.
This article is published under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License.
Original Publication Citation
Vida Maina, E., Forde, A., & Robinson, R. M. (2016). Impact of optimally minimizing delay times on safety at signalized intersections in urban areas, case study: The city of Virginia Beach. International Journal of Transportation Engineering, 3(4), 277-288. https://doi.org/10.22119/ijte.2016.16179
Repository Citation
Maina, Eugene Vida; Forde, Albert; and Robinson, R. Michael, "Impact of Optimally Minimizing Delay Times on Safety at Signalized Intersections in Urban Areas, Case Study: The City of Virginia Beach" (2016). VMASC Publications. 109.
https://digitalcommons.odu.edu/vmasc_pubs/109
Included in
Electrical and Computer Engineering Commons, Transportation Commons, Transportation Engineering Commons