Thesis
A framework for analyzing the effects of left-turn control modes on intersection operations
Washington State University
Master of Science (MS), Washington State University
2018
Handle:
https://hdl.handle.net/2376/104481
Abstract
Under this research a time-of-day variable left-turn phasing framework was developed. Operational impacts of each left-turn control mode were evaluated as well. The simulation framework was designed with a combination of five geometries, six through demand volumes, three left-turning percentages (5%, 10%, and 25%), and three left-turn control modes (a total of 5x6x3x3=270 scenarios). Signal timing plans of the scenarios were optimized using the 2016 Highway Capacity Manual methodologies. Each scenario was run with 15 different random seeds. A total of 4050 delay observations for left-turn and opposing through movements were collected. The statistical analysis of the observations showed that the number of left-turning vehicles, and the left-turn control modes were among the factors influencing intersection delay the most. Data results showed that protected-only left-turn control mode yields the highest intersection delays compared to protect-permissive or permissive-only left-turn control modes. A binary logit model was fitted to select the best left-turn control mode based on the intersection geometry and cross product of left-turn movement and opposing through movement volumes.
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Details
- Title
- A framework for analyzing the effects of left-turn control modes on intersection operations
- Creators
- Sattar Sattarov
- Contributors
- Ali Hajbabaie (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Civil and Environmental Engineering, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525398601842
- Language
- English
- Resource Type
- Thesis