Exploring the Safety Effects of Adaptive Signal Control Systems

The purpose of this paper is to investigate the safety impacts of adaptive signal control systems (ASCS). The authors developed a series of negative binomial regression models of different crash types to explore the relationships between the number of crashes and the factors influencing those crashes (traffic characteristic and roadway geometric features). Four hundred forty-nine observations of yearly intersection crashes were used to develop different regression models. An indicator variable tracking the installation of ASCS at the intersections was introduced into all regression models to determine the efficacy of the ASCS in terms of improving intersection safety. Analyses revealed that the deployment of ASCS in three corridors have resulted in crash reduction at a 0.05 significance level. The ASCS system resulted in a 24% reduction in the total number of crashes, a 29% reduction in the number of fatal and non-fatal injuries, a 31% reduction in the number of rear-end collisions, and an 18% reduction in the number of angle crashes. Further, a series of variables related to the roadway geometric features were deemed statistically significant at a 0.05 level in all models analyzed in this study.

• Record URL:
  • https://doi.org/10.1061/9780784482575.002
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784482575
• Supplemental Notes:
  • © 2019 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Jin, Weimin
  • 0000-0003-0148-6834
  • Khan, Sakib Mahmud
  • Chowdhury, Mashrur
• Conference:
  • International Conference on Transportation and Development 2019
  • Location: Alexandria Virginia, United States
  • Date: 2019-6-9 to 2019-6-12
• Publication Date: 2019-8

Language

• English

Media Info

• Media Type: Web
• Pagination: pp 8-18
• Monograph Title: International Conference on Transportation and Development 2019: Smarter and Safer Mobility and Cities

Subject/Index Terms

• TRT Terms: Adaptive control; Crashes; Intersections; Regression analysis; Traffic safety; Traffic signals
• Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors;

Filing Info

• Accession Number: 01729738
• Record Type: Publication
• ISBN: 9780784482575
• Files: TRIS, ASCE
• Created Date: Jan 30 2020 11:09AM