Tramcar network green wave coordination control method and device

Abstract

The invention discloses a tramcar network green wave coordination control method and device. A mixed integer linear programming model constructed by the method aims to maximize the weighted sum of thebidirectional green wave bandwidths of social vehicles; wherein model constraints comprise intersection phase sequence constraints, social vehicle and tramcar green wave constraints, social vehicle and tramcar interaction constraints, intersection trunk line intersection constraints, network outer ring closed-loop constraints and the like; and the constraints are relaxed through a 0-1 variable representing whether the green wave of a road section is interrupted or not, so that the green wave bandwidth of a tramcar is ensured to meet the traffic demand while the green wave bandwidth of socialvehicles is expanded as much as possible. According to the method, tramcar green waves of the whole road network rather than a single line can be optimized, the green wave band can reflect the road flow demand, and green waves of part of the road section can be interrupted under necessary conditions so as to achieve a globally optimal solution. And finally, cooperative, efficient and smooth operation of the tramcar and the social vehicle in the whole 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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