United States Department of Transportation
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An Integrated Intelligent Intersection Control System (III-CS) for Safety Improvement and Delay Minimization
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2022-01-01
[PDF-5.01 MB]
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Edition:SPR-B Final Report (December 12, 2018 – December 31, 2021)
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Abstract:The primary objectives of this research are to develop and test an Integrated Intelligent Intersection Control System (III-CS) that can concurrently address both safety and efficiency issues. Based on the dilemma zone protection system (DZPS) developed jointly by MDOT SHA and the research team, the proposed III-CS will have the following key features: execute the optimal green termination algorithm under the actuated control function to concurrently minimize the likelihood of rear-end collisions and total traffic delay; and activate the all-red extension to prevent potential angled crashes when detecting red-light running vehicles. From in-depth analysis results of two field studies two months apart, the deployed III-CS has proved its effectiveness in preventing angled crashes with its perfect detection rate, optimally activating or terminating the green extension, and significantly reducing the number of vehicles trapped in the dilemma zone, which is the main contributing factor to rear-end collisions.
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