Method for extracting vehicle queue length based on floating vehicle data
A technology of floating car data and queuing length, which is applied to road vehicle traffic control systems, instruments, traffic control systems, etc. It can solve the problem of poor model portability, a large amount of measured data, and lack of floating car data intersection queuing vehicle point extraction and judgment Methods and other issues to achieve the effect of saving manpower, easy and fast estimation
Active Publication Date: 2012-12-26
RES INST OF HIGHWAY MIN OF COMM
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Problems solved by technology
It needs to install detection equipment at intersections. In addition, the queue length of video stream detection is easily affected by factors such as weather, light, and camera shake.
[0007] The second is to establish a statistics-based relationship model between queue length and signal light timing, vehicle arrival rate, and traffic volume. It requires a large amount of measured data, and the model has poor portability.
This is due to the lack of an effective method for extracting and judging points of queuing vehicles at intersections using floating car data
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[0054] The present invention is a method for extracting vehicle queuing length based on floating vehicle data, comprising eleven steps, and the flow process is as follows: figure 1 shown. Each step of the method is realized by processing data through a computer running a program, and has practical value. The principle is described in detail below:
[0055] Please refer to figure 2 , figure 2 Indicates the distribution of floating cars within 20 minutes near the intersection of a road section. The intersection is composed of road section 1, road section 2, and road section 3. The small black circle represents the stopping point of the floating car.
[0056] In the present embodiment, there are 43 floating car stop points. The GPS device numbers of the floating vehicles corresponding to these stopping points are: 5097, 6694, 3313, 2469, 2006, 4752, 9284, 7262, 7826, 5861, 7710, 8112, 3571, 9828, 7716, 5384, 4115, 3319, 1915, 7351, 1960, 3483, 4901, 7364, 7878, 6816, 7649,...
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The present invention relates to a method for extracting vehicle queue length based on floating vehicle data, which comprises the following steps: step 1, establishing a stop point floating vehicle record subdatabase; step 2, calculating the projection distance of the stop point floating vehicle; step 3, filtering the road where the stop point floating vehicle stays with the maximum allowable value of the projection distance; step 4, secondarily determining the road where the stop point floating vehicle stays in a check-back manner; step 5, calculating the distance from each stop point floating vehicle to the crossing; step 6, sorting the queuing position of the stop point floating vehicle; step 7, setting a reference length threshold value; step 8, carrying out a primary statisticsfor the number of the stop point floating vehicles; step 9, obtaining the maximum sum; step 10, carrying out a secondary statistics for the stop point floating vehicle; step 11, determining the queue length. The method can estimate the queue length of the vehicles in the crossing on the road by employing the floating vehicle data, thereby avoiding the shortage in the prior art which use video detecting devices and on-site actual measurement data.
Description
technical field [0001] The invention belongs to the technical field of real-time information processing of intelligent traffic roads, and in particular relates to a method for obtaining traffic information by using floating car data. Specifically, it is a method for extracting the queue length of road segment intersections using floating car data. Background technique [0002] Floating car, also known as GPS detection car, is one of the advanced technical means used in the international intelligent transportation system (ITS) to obtain road traffic information in recent years. It has the characteristics of convenient application, economy and wide coverage. [0003] Floating vehicles are composed of vehicles equipped with on-board GPS (Global Position System, Global Positioning System) equipment and can freely drive on actual road sections. At present, most floating vehicles are composed of taxis equipped with GPS equipment in normal operation. The floating car returns data ...
Claims
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IPC IPC(8): G08G1/00
Inventor 王东柱李亚檬朱书善宋向辉陈艳艳谌仪刘楠赵佳海
Owner RES INST OF HIGHWAY MIN OF COMM