This paper presents the design and evaluation of a dilemma zone protection system that utilizesthe dynamic detection technology to track individual vehicles as they approach an intersection ofinterest. A high-speed rural intersection in Maryland experiencing a high frequency of crasheswas selected for system installation and evaluation. Data collected from 3 sensors, designedspecifically for tracking individual vehicles, were deployed along the target approach were usedin real time to control the signal logic, providing green or all-red extensions when the pre-defined parameters of detected vehicles are met. To evaluate the performance of the systemdesign and the effectiveness of the associated parameters, a field test was further conducted. Thedata analysis included the identification of falsely-called red extensions (related to efficiency)and missed red extensions (related to safety) to assess the overall performance of the newlyinstalled system. The field observation results indicate that the newly designed dynamicdilemma zone protection system using an all-red extension offers distinct advantages overtraditional systems by providing additional protection to high-speed vehicles even when they arein the "cannot go zone" and make an incorrect decision to go.
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