By widely introducing information technology tools in the field of traffic control, it is possible to increase the capacity of hubs and reduce vehicle delays. Adaptive traffic light control is one of such tools. Its effectiveness can be assessed through traffic flow simulation. The aim of this study is to create a simulation model of a signal-controlled intersection that can be used to assess the effectiveness of adaptive control in various traffic situations, including the presence or absence of pedestrian traffic through an intersection. The model is based on a numerical experiment conducted using the Monte Carlo method. As a result of the study, vehicle delays, queue length and duration of traffic light cycles are calculated subject to different intensities of incoming traffic flows, and the presence or absence of pedestrian traffic.
Abstract. By widely introducing information technology tools in the field of traffic control, it is possible to increase the capacity of hubs and reduce vehicle delays. Adaptive traffic light control is one of such tools. Its effectiveness can be assessed through traffic flow simulation. The aim of this study is to create a simulation model of a signal-controlled intersection that can be used to assess the effectiveness of adaptive control in various traffic situations, including the presence or absence of pedestrian traffic through an intersection. The model is based on a numerical experiment conducted using the Monte Carlo method. As a result of the study, vehicle delays, queue length and duration of traffic light cycles are calculated subject to different intensities of incoming traffic flows, and the presence or absence of pedestrian traffic.
Рассматриваются результаты внедрения системы адаптивного управления светофорным регулированием «Спектр 2.0» на одном из регулируемых пересечений улиц в Тюмени. Делается вывод о ее эффективности в сравнении как с жестким регулированием, так и с устройством двухуровневой развязки. Ставится дальнейшая задача по определению эффективной области применения адаптивного регулирования в дополнение или вместо применения мероприятий по переустройству пересечений, в том числе устройства развязок, что повысит конечную эффективность мер по изменению организации движения и переустройству пересечений и даст больший интегральный эффект для общества. Ключевые слова: регулируемые пересечения, задержки транспортных средств, заторы, транспортные пересечения в разных уровнях, адаптивное управление движением. The paper considers the results of introduction of the «Spectrum 2.0» adaptive control traffic regulation system at one of the controlled intersections in the city of Tyumen. The conclusion is made about the effectiveness of this system in comparison with both the rigid regulation and the two-level junction arrangement. The authors set a further task aimed at determining the effective area of adaptive regulation application in addition to or instead of applying measures for the reconstruction of intersections, including junction arrangement, which will increase the ultimate effectiveness of measures on changing the traffic organization and reconstruction of intersections and will have a greater integral effect for citizens.
The use of information technology in traffic management can increase the capacity of traffic intersections and reduce vehicle delays. In cities, adaptive traffic control at traffic lights intersections has been well established. Adaptive regulation is applied mainly on isolated traffic lights, where the traffic flow has a predominantly exponential distribution of intervals. It was established experimentally that the effectiveness of the method decreases with a supersaturated traffic flow, which makes it difficult to find a “cutoff point”, a convenient moment for switching the traffic light signal. The article shows that at isolated multi-band intersections, the search for a convenient signal switching time is difficult at low loading levels. At uninsulated intersections, the incoming flow will have clear periods of time without vehicles, which makes the operation of adaptive traffic control in these conditions at a multi-lane crossing more efficient. This suggests the need for further study of the patterns of distribution of intervals between cars in urban environments at the approaches to non-isolated intersections and at the approach to intersections operating without coordination with other traffic lights.
The paper deals with the issue of uniformity indicator of the traffic capacity at the regulated intersections from the standpoint of the traffic management, emphasizing the importance of accounting the value of uniformity, in addition to the value on the traffic performance. The schemes of traffic management are provided, where the interferences, due to turning vehicles and the movement of pedestrians in one phase, reduce the uniformity of the traffic capacity. This reduces the efficiency of traffic light regulation and increases the queue length and overall vehicle delays. The conclusions of the study are confirmed by carrying out a multiple-factor testing with the search for statistically significant coefficients.
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