Regional signal control method based on dynamic OD flow prediction and simulating optimization
A traffic forecasting and signal control technology, applied in the direction of traffic signal control, etc., can solve the problems of unreliable knowledge of dynamic traffic demand changes, difficult road network supply capacity and traffic demand matching, and achieve the effect of saving investment
Inactive Publication Date: 2015-04-29
CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
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Problems solved by technology
As far as the current technology is concerned, the regional signal control system does not predict the dynamic OD flow (traffic demand) of the road network, and cannot reliably know the dynamic traffic demand change situation of the entire regional road network, making the supply control method based on the traffic signal controller It only has the characteristics of partial vision and passive response, and it is difficult to match the supply capacity of the road network with the traffic demand
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[0021] The present invention will be described in further detail below by means of specific embodiments:
[0022] The embodiment is basically as figure 1 Shown: The regional signal control method based on dynamic OD flow prediction and simulation optimization mainly includes the following steps:
[0023] (1) Historical data collection and processing: For the same day in the previous week, use the license plate number data automatically obtained by the high-definition bayonet electronic police at major intersections in the road network, combined with the flow data of some road sections, to estimate the historical dynamics of each time period of the day OD flow; use dynamic OD matrix estimation methods, such as recursive least squares (RLS) algorithm, etc., without any historical or prior OD flow, only cross-sectional flow or speed detection data of some road sections , it is possible to estimate a set of equivalent dynamic OD matrix. For the expressway network, historical dyn...
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The invention discloses a regional signal control method based on dynamic OD flow prediction and simulating optimization. According to the regional signal control method based on the dynamic OD flow prediction and the simulating optimization, the matching of road network requirements and supply capacity is achieved, and the function that a regional signal control system can reduce traffic jams is better developed. The regional signal control method comprises the steps of collecting and processing historical data, acquiring license plate number data through using high definition bayonet electronic police according to a last historical period, and calculating to obtain historical dynamic OD flow of each cycle in the same day; transmitting the optimized signal timing parameters to traffic signal controllers of each crossing for specific implementation. According to the regional signal control method based on the dynamic OD flow prediction and the simulating optimization, the problem that a timing plan can not conduct automatic adjustment according to actual flow for a signal controlled crossing without installing any detector is solved.
Description
technical field [0001] The invention relates to a traffic control system in the field of intelligent traffic. Background technique [0002] Intelligent traffic signal optimization control is an important means to alleviate urban road traffic congestion and improve the operating efficiency of urban traffic systems. At present, a series of adaptive traffic signal control systems have been successfully developed at home and abroad, such as SCOOT system in the UK, SCAT system in Australia, CRONOS system in France, RHODES system, OPAC system, ACS Lite system in the United States, HiCon system in my country, etc. , and achieved relatively good application benefits. [0003] The survey of the origin and destination of motor vehicle travel is referred to as OD traffic survey. This survey is to understand the overall traffic travel characteristics of the highway, and to serve for the planning of the road network and the adjustment of the road network structure. OD flow refers to the...
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IPC IPC(8): G08G1/08
Inventor 林勇
Owner CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST