Design and Evaluation of a Dynamic Dilemma Zone System for a High Speed Rural Intersection
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2012-08-01
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Alternative Title:Design & Evaluation of a Dynamic Dilemma Zone System for a High Speed Rural Intersection
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Edition:Final report.
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Abstract:The goal of this research was to develop a system that utilizes the dynamic detection technology and
to evaluate the performance of this system. The first step of this study was to select an intersection
experiencing a high frequency of crashes that could be remedied by a dilemma-zone protection system.
Next, a dynamic dilemma-zone protection system was designed using three microwave sensors to track
vehicles approaching the intersection on the major approach. The data collected by these sensors were
then used in real-time to control the signal logic, providing green extensions and all-red extensions when
pre-defined parameters of detected vehicles are met. To evaluate the performance of the system design
and the appropriateness of the associated parameters, a field test was conducted. The data analysis
included the identification of false called all-red extensions (related to efficiency) and missed all-red
extensions (related to safety) to assess the overall performance of the newly installed dynamic dilemma
zone protection system.
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