Method of simulated estimate of expressway-traffic-accident-affected areas based on particle filter algorithm

A particle filter algorithm, expressway technology, applied in the traffic control system of road vehicles, traffic flow detection, traffic control system, etc., can solve the problem that it is difficult to accurately reflect the traffic operation status and development trend

Active Publication Date: 2017-01-25
CHONGQING UNIV
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Problems solved by technology

The real-time measured traffic flow data cannot be introduced into the simulation environment, and the output results of the simulation cannot accurately reflect the actual traffic operation status and development trend of the real road

Method used

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  • Method of simulated estimate of expressway-traffic-accident-affected areas based on particle filter algorithm
  • Method of simulated estimate of expressway-traffic-accident-affected areas based on particle filter algorithm
  • Method of simulated estimate of expressway-traffic-accident-affected areas based on particle filter algorithm

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Embodiment

[0067] The method for simulating and estimating the impact range of expressway traffic events based on the particle filter algorithm provided by this embodiment includes the following steps:

[0068] Step 1, obtain the highway traffic network structure data, the highway traffic road network structure data mainly includes the length of each road section, the number of lanes, and the connection of lanes, and draw the corresponding simulated road through the highway traffic road network structure data Network structure diagram, and according to the actual position information of the vehicle detector layout, virtual vehicle detectors are deployed at the corresponding positions of the simulated road network to establish a highway simulation model;

[0069] Step 2. Obtain the traffic event information in the scope of influence to be estimated, including the event occurrence time, stake number range, driving direction and expected duration;

[0070] Step 3, according to the traffic e...

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Abstract

The invention discloses a method of simulated estimate of expressway-traffic-accident-affected areas based on particle filter algorithm. First, the data of highway traffic network structure is obtained to build the simulation model of expressway traffic network and in the corresponding location of the actual vehicle detector a simulated vehicle detector is arranged; the traffic accident information on spot is obtained together with the history data provided by vehicle detectors on the accident section to estimate the dynamic OD data on the accident road section when the accident takes place; and the traffic flow the next moment is simulated and compared, and the weight of simulation particles and queue length and output start and end position of the jam are calculated to get the maximum area affected by the accident.The method provided by the invention combines VISSIM with the particle filter data assimilation, allowing the simulation system to dynamically absorb real-time expressway traffic state data, track the traffic trend and estimate the traffic accident-affected area.

Description

technical field [0001] The invention relates to the technical field of intelligent traffic systems, in particular to a method for simulating and estimating the impact range of expressway traffic events based on particle filter algorithms. Background technique [0002] Traffic incidents on expressways will reduce the traffic efficiency of road sections, and may cause road traffic jams and vehicle queuing problems in the case of large traffic volumes. Reliable estimation of the scope of influence and development trend of traffic events is the premise and basis for formulating targeted traffic control strategies, and it has important practical significance for ensuring the smooth operation of expressways and improving the management and service level of expressways. [0003] The current method of predicting the impact range of expressway traffic events is mainly based on the traffic wave theory, by estimating the traffic density upstream and downstream of the event section, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01
CPCG08G1/0104
Inventor 赵敏孙棣华郑林江胡沧粟
Owner CHONGQING UNIV
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