The article describes the issues related to determining time conditions for adaptive control algorithms. It outlines the current state of knowledge regarding the determination of time conditions. The description is based on an analysis of approximately 300 traffic signal projects from across Poland. Subsequently, the most frequently occurring time conditions in control algorithms were classified. A practical method for determining selected time conditions is also described. The article further defines directions for future research in the field of determining these conditions.Currently used traffic control solutions are predominantly adaptive, where traffic control depends on the traffic situation at the intersection. Information about vehicle traffic is obtained from traffic detectors.
The states of traffic signals in adaptive control are determined based on a control algorithm that decides on the extension or termination of individual traffic phases. Depending on the decision-making criteria in adaptive control, many control methods can be distinguished. Depending on the criteria for terminating (changing) traffic phases, these methods can be based on time intervals (actuated control) as well as other, more complex parameters, such as queue length, traffic volume, level of traffic freedom, etc. (…)
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Source: Logistyka Magazine 4/2010
Determining time conditions for the operation of adaptive control algorithms – PDF file for download