Implementation of specialized traffic controllers

Abstract: The article presents the important role played by local controllers in traffic control systems. Increasing requirements for these controllers lead to the search for new ways of implementing traffic control devices. Technological development and the introduction of programmable circuits into common use contribute to the creation of new solutions. Combining these issues allowed for the construction of specialized hardware traffic controllers using SoC technology.The article presents the main points and assumptions of the method for implementing traffic control devices in the form of specialized programmable devices, including the specification of control device models in hardware description languages using finite state machine transition graphs, where the introduction of hierarchy eliminated the flatness of the model. The assumptions for device model verification and elements of reliability analysis are also presented.
1. INTRODUCTION
The increasing intensity of road traffic, which worsens its conditions, forces the search for increasingly modern and effective methods of traffic control at intersections, which also ensure a high class of safety. This forces the continuous development of traffic control systems.
The high dynamics of traffic processes mean that most traffic control functions are transferred to the local level of the system, where local traffic controllers are located [10]. These devices are directly responsible for traffic control at the intersection. These digital reactive systems operate under conditions of incomplete information about the traffic process and are controlled by events occurring in this process. Information about the state of the process is provided through a network of sensors and traffic detectors. Decisions affecting traffic safety often have to be made in real time, which in turn is not favored by complex traffic control algorithms.
2. TRAFFIC CONTROL DEVICES
2.1. Traffic control algorithms
The idea of traffic control in modern local traffic controllers is based on the controller executing a traffic control algorithm, i.e., a finite, ordered sequence of clearly defined actions necessary to perform the assumed traffic control function. (…)

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