Hrytsun O. Justification of rational regimes of traffic light control taking into account traffic flow characteristics and pedestrian behavior

The paper is dedicated to choose of rational (by duration) regimes of traffic light control, during which number and duration of delays in traffic flows and probability of commission of road traffic incidents, which are the result of road users behavior, reduces. Backgrounds for these negative phenomena are: variation of traffic intensity, when pedestrian, during continuous restrictive signals for him, can start to cross the roadway that is unexpected for vehicle driver, especially in nighttime; observation the requirements of only regulatory documents during designing the elements of road network that is not always adequate for different functional areas of settlements and movement conditions of its users; absence of distinct regulation of traffic light control parameters limits which would create its rational regimes taking into account traffic flow characteristics and pedestrian behavior. Such methods are proposed: determination the change of pedestrian patient waiting time in different control regimes and roadway parameters; investigation of traffic flow delays depending from control parameters. In the paper experimental research on pedestrian behavior are conducted on controlled intersections for different functional areas and in different daytime and also dynamic parameters in traffic flow are investigated. Methods for choose the rational regimes of traffic light control is developed, based on minimization of number of violations by pedestrians requirements of traffic light signals depending from volume-capacity ratio and maximum queue length on approach to the stop-line. Estimation of rationality is performed with consideration of simultaneous influence of such factors: volume-capacity ratio, duration of traffic light restrictive signal, number of violations by pedestrians and maximum queue length. On this basis in program software MATLAB the model for choose the rational control regime is developed, taking into account intersection type which (type) depends from traffic flow characteristics, pedestrian behavior and movement conditions. In this paper first: the model for change the number of violations of pedestrians is developed, depending on volume-capacity ratio on intersections of different types; the model for determination maximum queue length is developed, depending from volume-capacity ratio and restrictive signal rate on the line in control cycle; recommendations about choose the rational regimes of traffic light control are proposed, depending from traffic delay, planning parameters of road network and pedestrian behavior.