Coordination And Optimization Method Of Signal Control And Tram Network Dispatching

The economical,energy-saving and high-efficiency of trams have made them a key mode of transportation for many cities in our country.The current research on the calculation of the minimum departure interval in tram dispatching under the consideration of green waves is mainly focused on the study of single-line trams,and there is a lack of research on the minimum departure interval of double-line trams under networked operation conditions.And it does not take into account the fact that the tram departure interval in actual engineering applications may not be an integer multiple of the intersection cycle.In view of the deficiencies of current research,the research content of this article is as follows:Under the conditions of networked operation,there are many forms of lines in the tram network.Based on the analysis of the characteristics of the tram lines,the tram lines are classified,which can be divided into two types: single line and double line.The double-line tracks can be combined into a variety of forms of lines by straight lines and turning lines.For different forms of lines,according to the number of trams in a single cycle,study the pressure that trams bring to the road network and intersections,and give feedback on the bottleneck of the tram network.According to the bottleneck of the road network,the bottleneck of the tram departure interval is deduced,that is,the minimum departure interval.Based on the existing green wave model,combined with social vehicle driving characteristics,tram driving characteristics,and intersection level,the green waves in the road network are divided into green waves that only consider trams,and trams and Social vehicles are considered at the same time.According to different green wave conditions,study the cycle of tram intersections along the line,and study the minimum departure interval of trams under different green wave conditions.Considering the capacity of the tram station platform in the section,the number of trams arriving at the intersection per cycle is limited according to the platform capacity,and then the minimum tram departure interval is restricted.In view of the fact that the tram departure interval and the intersection cycle are not integer multiples,an intersection signal priority control plan is proposed.According to the relationship between the tram and the intersection cycle,the time when the intersection needs to turn on the signal priority control and duration are calculated.In order to understand the calculation of the minimum tram departure interval,construct a tram network case,use the tram network split method to split the road network into multiple associated small road networks,and study the traffic characteristics of each associated small road network.According to the number of tram line overlaps,tram station capacity,intersection cycle,social vehicles and tram green wave restrictions,calculate the minimum departure interval of trams on different lines of different associated small road networks.Take a main tram line as an example,study the signal priority control scheme of the main line intersection when the tram departure interval and the intersection cycle are not integer multiples under the condition of the public cycle,and set the scheme in the tram operation diagram.