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Safety and Mobility Improvement at Highway-rail Grade Crossings Using Real-Time Optimized Preemption of Traffic Signal Strategies
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2024-04-15
[PDF-2.65 MB]
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Edition:Final Report (December 1, 2022 - April 30, 2024)
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Abstract:This research project embarked on a crucial endeavor to enhance safety and efficiency at highway-rail grade crossings (HRGCs) through the innovative development and application of real-time optimized traffic signal preemption strategies. Recognizing the significant risks associated with HRGCs, especially in urban areas where such crossings are in close proximity to signalized intersections, this study aimed to address the complexities of traffic flow and preemptive signal operations to improve both safety and mobility. The project progressed through the completion of four major tasks: 1) Review and Identification of Limitations: Conducting a holistic review of existing preemption operations, national guidelines, and current engineering practices, the study began with studying in current HRGC preemption strategies. 2) Effectiveness Verification: Through the development of microsimulation models and sensitivity analysis, the project rigorously tested the efficacy of various preemption plans across different HRGC scenarios. 3) Standard Optimization Process: Aiming to maximize safety and operational efficiency, a standard optimization process for designing preemption strategies was developed. 4) Guideline Development: A significant outcome of the project was the development of a guideline that provides a standardized process for evaluating the effectiveness of signal control at HRGCs and adjacent arterials. This research represents a significant step forward in traffic safety and efficiency management at HRGCs, providing a model for similar traffic situations in other regions and laying the groundwork for future technological advancements in the field. The developed guideline serves to offer technical support in terms of application conditions, plan formation, and system operations, aiming to facilitate implementation while enhancing coordination between railway and highway agencies.
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