Safety Assessment of Heterogeneous Traffic at Urban Intersections Using Simulated Conflicts
In this paper, an attempt was made to investigate the potential of traffic conflicts, identified from microscopic simulation model as explanatory variables in crash prediction models for intersections having heterogeneous traffic. Such traffic streams are characterized by absence of lane discipline and the presence of non-motorized vehicles. Hence, role of non-motorized traffic in influencing safety at such intersections was also investigated. Simulated conflict based crash prediction models were developed for intersections of Dhaka City, the capital of Bangladesh. Intersections were modeled in a suitably calibrated simulation platform, VISSIM, for 8 hours of peak hour traffic and the resulting trajectory file of every hour analyzed in SSAM to identify the corresponding simulated hourly conflicts. It was found that hourly simulated conflicts had a significant statistical relationship with hourly crash count but the fit of the simulated conflict based crash prediction model was poorer compared to traffic volume based model.
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Supplemental Notes:
- This paper was sponsored by TRB committee ANB20 Standing Committee on Safety Data, Analysis and Evaluation.
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Corporate Authors:
500 Fifth Street, NW
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Authors:
- Islam, Nayeem
- Faruk, Md Omar
- Shimu, Tahmida Hossain
- Hadiuzzaman, Md
- Musabbir, Sarder Rafee
- Rahman, Farzana
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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; References; Tables;
- Pagination: 18p
- Monograph Title: TRB 96th Annual Meeting Compendium of Papers
Subject/Index Terms
- TRT Terms: Crash causes; Intersections; Nonmotorized transportation; Traffic volume; Urban highways; Vehicle mix
- Geographic Terms: Dhaka City (Bangladesh)
- Subject Areas: Highways; Safety and Human Factors;
Filing Info
- Accession Number: 01625681
- Record Type: Publication
- Report/Paper Numbers: 17-04116
- Files: TRIS, TRB, ATRI
- Created Date: Feb 9 2017 11:11AM