Lamp group based mixed traffic flow signal timing optimization method

Abstract

The invention provides a lamp group based mixed traffic flow signal timing optimization method, which comprises the steps of numbering each lamp group; setting a target function to be solved, wherein the target function takes the shortest period as a solving target, or takes the shortest period as a solution or takes the maximum traffic capacity as a solution; setting constraint conditions of the target function; writing a non-linear optimization solving program according to the target function and the constraint conditions; and finally acquiring an optimization timing result. The method provided by the invention has the advantages and beneficial effects that a signal timing scheme can be flexibly adjusted in allusion to flow requirements of different lamp groups, a concept of phase position is not used, turn-on of the lamp groups is not affected by other traffic flows at the same phase position any more, and the green lamp turn-on time of different traffic flows can be connected flexibly so as to achieve maximization of the traffic efficiency of a road crossing; and the traffic safety of non-motorized vehicles and pedestrians can be effectively ensured, and solving is conducted simply and conveniently.

Description

technical field [0001] The invention belongs to the technical field of timing signal optimization timing, and in particular relates to a method for optimizing the timing of mixed traffic flow signals based on lamp groups. Background technique [0002] There are many non-motorized vehicles and pedestrians in some urban road intersections, which account for a relatively large proportion of the traffic composition at the intersection, and the mutual interference between various modes of traffic flow is serious, which has the characteristics of mixed traffic flow. Especially in recent years, the rapid growth of electric vehicles and power-assisted bicycles has further expanded the speed range of traffic flow at urban road intersections, covering pedestrian traffic flow speeds of 3-5km / h and non-motor vehicle traffic flow speeds of 10-35km / h. Speed ​​and 50 ~ 80km / h motor vehicle traffic flow speed, which makes the signal control of the intersection more complicated. [0003] In...

AI Technical Summary

Problems solved by technology

In this case, when non-motor vehicles and motor vehicles still use the same phase, non-motor vehicles cannot pass within the corresponding green light interval after the green light ends, thus causing safety hazards

[0004] In addition, the research on the signal optimization model under the condition of machine-non-separation often determines the phase structure first, and then optimizes the phase sequence, which greatly limits the scope of the optimization scheme.

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