This issue contains 14 papers concerning traffic signal systems. Specific topics addressed include: intelligent dilemma-zone protection systems for high-speed rural intersections; adaptive signal control in Germany; queue length estimation under connected vehicle technology; signal timing optimization of full continuous flow intersections; transit priority strategies for multiple routes under headway-based operations; multiregime adaptive signal control for congested urban roadway networks; and metered entry volume on an oversaturated network with dynamic signal timing. Additional topics include: arterial queue spillback detection and signal control based on connected vehicle technology; transit priority control under arterial progression; dynamic programming approach for arterial signal optimization; self-organizing control logic for oversaturated arterials; microwave radar vehicle detectors at signalized intersections under adverse weather conditions; a performance diagnosis tool for arterial traffic signals; and the impact of adaptive traffic signal control on traffic and transit performance.
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