Impact of Traffic Signal Control Parameters on Frequency and Severity of Intersection-Related Crashes
While previous research in the area of intersection crash modeling mostly distinguishes between signalized and unsignalized intersections, this paper provides a detailed insight into the association of signal timing parameters with intersection-related crashes. Crash data were collected for 148 urban signalized intersections in Fort Lauderdale, Florida, for 11 years. Crash frequency is modeled using negative binomial regression, while distinguishing between the crashes that occur upstream and downstream of the intersection. Crash severity is modeled using multinomial logit model for three crash categories: no injury, possible injury, and severe injury or fatality. The results obtained from the crash frequency models clearly show how signal timing parameters have higher influence on crashes that occur upstream of the intersection, as expected. It is found that the average annual daily traffic (AADT) volume, cycle length, offset, number of phases and all-red clearance time have significant impact on intersection crash frequency. Severity of the crashes which were intersection related was influenced by the speed limit, AADT, all-red clearance time, left turn phase setup, number of signal phases, number of approach lanes, split time, and cycle length. Crash frequency models obtained and presented in this paper show the potential for future exploration of developing separate models for crashes that occur upstream and downstream of the intersection. Developed severity models show the need for future consideration of signal timing parameters when modeling intersection-related crashes.
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Supplemental Notes:
- This paper was sponsored by TRB committee ANB25 Standing Committee on Highway Safety Performance.
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Jolovic, Dusan
- Mudgal, Abhisek
- Tasic, Ivana
- Stevanovic, Aleksandar
- Martin, Peter T
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Conference:
- Transportation Research Board 96th Annual Meeting
- Location: Washington DC, United States
- Date: 2017-1-8 to 2017-1-12
- Date: 2017
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; Maps; References; Tables;
- Pagination: 18p
- Monograph Title: TRB 96th Annual Meeting Compendium of Papers
Subject/Index Terms
- TRT Terms: Crash characteristics; Crash rates; Crash severity; Signalized intersections; Traffic signal control systems; Traffic signal timing; Urban areas
- Geographic Terms: Fort Lauderdale (Florida)
- Subject Areas: Highways; Safety and Human Factors;
Filing Info
- Accession Number: 01624353
- Record Type: Publication
- Report/Paper Numbers: 17-01695
- Files: TRIS, TRB, ATRI
- Created Date: Jan 30 2017 9:54AM