Control method for single-point self-organizing traffic signal based on wireless sensor network

Abstract

The invention relates to a single-point self-organization traffic signal controlling method based on a wireless sensor network. The method comprises the following steps: (1) a vehicle node is arranged in the interior of a running vehicle, information collecting nodes are arranged at a road side, and converging nodes are arranged at a crossroad; (2) (Eta, Theta) represents a driveway where the vehicle is in, and every driveway is allocated with a phase p(Eta, Theta) to construct a candidate phase set; (3) traffic data is collected in real time; (4) discrimination is carried out on traffic status of the crossroad, if a non-congestion status is discriminated, an original single time allocation scheme is implemented, but if not, Step (5) is carried out; (5) when waiting time of a certain direction exceeds the upper limit of waiting time, the flow direction with maximum waiting time is selected as a key flow direction which is otherwise determined by calculating pkey (Eta, Theta), green light time is allocated for a planned release phase where the key flow direction is and the wayleave of a green light is granted. The method can provide real-time accurate traffic data detection and realize good controlling result in traffic jams.

Description

technical field [0001] The invention relates to the field of traffic control, in particular to a traffic signal control method. Background technique [0002] Traffic signal control can effectively improve the order and efficiency of road traffic. The traffic signal control method has been developed from single-point fixed timing signal control to network adaptive signal control, which has played a pivotal role in the development of urban road traffic. At present, the biggest problem facing the traffic signal control system is that it is difficult to effectively guide the congested traffic flow. The main reasons are: [0003] (1) Lack of sufficient real-time traffic data [0004] In the prior art, dynamic traffic signal control is mainly based on loop induction coil data. Since the layout position of the coil is usually limited to the upstream of the road section or near the intersection stop line, the collected traffic data is relatively limited, so the existing signal ti...

AI Technical Summary

Problems solved by technology

[0012] In order to overcome the lack of real-time and accurate traffic data and poor control effect under congested conditions in existing traffic signal control methods, the present invention provides a real-time and accurate detection Traffic data, a wireless sensor network-based single-point self-organizing traffic signal control method that achieves good control effects under congested conditions, abbreviated as DTSC-WSN

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