A green wave coordinated control method and device for a tram network

Abstract

The invention discloses a green wave coordinated control method and device for a tram network. The mixed integer linear programming model constructed by the method of the invention aims to maximize the weighted sum of the two-way green wave bandwidth of social vehicles, and the model constraints include intersection phase Sequence constraints, social vehicles and tram green wave constraints, social vehicle tram interaction constraints, intersection arterial intersection constraints and network outer circle closed-loop constraints, etc., and through the 0‑1 variable that indicates whether the green wave of the road section is interrupted The constraints are relaxed, and while the green wave bandwidth of social vehicles is expanded as much as possible, the green wave bandwidth of trams is guaranteed to meet the traffic demand. The present invention can optimize the green wave of trams on the entire road network instead of a single line, and the green wave band can reflect the size of the road flow demand, and can interrupt the green wave of some road sections under necessary conditions to achieve the global optimum Excellent solution. Finally, the coordinated, efficient and smooth operation of trams and social vehicles in the entire road network is realized.

Description

technical field [0001] The present invention relates to the field of road traffic signal control in the field of intelligent transportation, in particular to a green wave coordinated control method and device for a tram network, which ensures the traffic efficiency of social vehicles in the road network and takes into account the traffic demand of trams; At the cost of not setting up green waves on some road sections, the pursuit of the overall green wave bandwidth and maximum of the network. Background technique [0002] With the continuous improvement of China's urbanization level and the continuous increase of car ownership, the pressure of urban traffic congestion is increasing. At the same time, the demand for urban transportation tends to be stratified and diversified. As a public transportation system between urban rapid rail transit and traditional public transportation, modern trams will have broad development prospects in China. [0003] However, trams have uniqu...

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Problems solved by technology

[0005] On the basis of the green wave of the main line, the network green wave model introduces the crossing constraint of the main line at the intersection and the closed-loop constraint of the outer circle of the network, but the additional constraints further narrow the scope of the feasible region, and sometimes even lead to no feasible solution

[0006] To sum up, scholars at home and abroad have achieved certain research results in green wave algorithm and tram signal priority, but there are still some deficiencies: (1) At present, most of the tram traffic signal coordination control methods are based on MAXBAND Based on the research, the latest achievements only stop at the green wave control of the main line of the single-line straight tram, and lack the consideration of the tram line into the network

(2) The development of the network green wave control model is not yet mature, especially to deal with the problem of too tight constraints, lack of effective methods, and it is difficult to obtain the global optimal solution

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