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

A wireless sensor and traffic signal technology, applied in the field of traffic control, can solve problems such as poor control effect and lack of real-time accurate traffic data

Inactive Publication Date: 2009-07-29
ZHEJIANG UNIV OF TECH
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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

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

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Embodiment Construction

[0099] The present invention will be further described below in conjunction with the accompanying drawings.

[0100] refer to Figure 1 to Figure 5 , a single-point ad hoc traffic signal control method based on a wireless sensor network, comprising the following steps:

[0101] 1) Deploy the information collection nodes, information convergence nodes and vehicle nodes in the wireless sensor network: place the vehicle nodes inside the moving vehicles, arrange the information collection nodes on the roadside, and arrange the convergence nodes at the intersections;

[0102] 2) Design candidate phase sets: the intersection has four entrance directions: east, south, west, and north, and the entrance direction can be expressed as η∈{E, S, W, N}, where E represents east and S represents south , W means west, N means north; the running direction of the vehicle can be expressed as θ ∈ {L, T, R}, where L means turn left, T means go straight, R means turn right, {η, θ} means where the v...

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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 tim...

Claims

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Application Information

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IPC IPC(8): G08G1/081
Inventor 郭海锋张贵军俞立
Owner ZHEJIANG UNIV OF TECH
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