Method for judging passing capability of traffic intersection
A technology of intersection and traffic capacity, which is applied in the field of urban traffic data analysis, and can solve problems such as traffic interference at intersections, small traffic levels, and inconsistencies with actual traffic levels at intersections.
Inactive Publication Date: 2018-11-16
安徽畅通行交通信息服务有限公司 +1
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Problems solved by technology
[0002] At present, the saturation flow applied to the signal control calculation of urban road intersections mostly adopts the design traffic capacity, which is inconsistent with the actual traffic level of the intersection. The main reason is that the traffic at the intersection is disturbed by various factors. The traffic level is much smaller than the design traffic capacity
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[0027] The present invention will be further described below in conjunction with accompanying drawing:
[0028] Such as figure 1 As shown, a method for judging the traffic capacity of an intersection in this embodiment includes the following steps:
[0029] S1: Set a detection line near the lower edge of the video detector;
[0030] S2: Count the number of vehicles passing the detector within one signal period;
[0031] S3: Calculate intersection saturation;
[0032] S31: Calculate the number Q of vehicles passing by each lane per hour in a signal cycle i :
[0033]
[0034] Among them, q i Indicates the actual number of vehicles passing within the effective green light time within a signal cycle, G i Indicates the green light passing time within one cycle of lane i;
[0035] S32: Calculate the saturation of each vehicle in a signal period:
[0036] x i =Q i / S i
[0037] where x i Indicates the saturation of each vehicle in one signal period, S i Indicates th...
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The invention relates to a method for judging the passing capability of a traffic intersection, and the method comprises the following steps: (1), setting a detection line at a position close to the lower edge of a video detector; (2), counting vehicles passing by the detector in one signal period; (3), calculating the saturation degree of the intersection; (4), calculating the lane saturation degree when the vehicles passes by a gate; (5), comparing the saturation degrees of the intersection and the lane saturation degree with a threshold value: taking the data as invalid data and deleting the data if the saturation degrees of the intersection or the lane saturation degree is greater than the threshold value, or determining that the passing capability of the intersection is good when thesaturation degrees of the intersection and the lane saturation degree with a threshold value are less than the threshold value. The method employs the tracking and detection advantages of the video detector, extracts the time interval of the heads of the vehicles moving at a constant speed as the key basis for the calculation of saturation flow, calculates the saturation degree of the intersection, and provides a basis for the evaluation of the signal timing dial and effect of the intersection.
Description
technical field [0001] The invention relates to the technical field of urban traffic data analysis, in particular to a method for judging traffic capacity of an intersection. Background technique [0002] At present, the saturation flow applied to the signal control calculation of urban road intersections mostly adopts the design traffic capacity, which is inconsistent with the actual traffic level of the intersection. The main reason is that the traffic at the intersection is disturbed by various factors. The traffic level is much smaller than the design traffic capacity. Contents of the invention [0003] The purpose of the present invention is to provide a method for judging traffic capacity of an intersection, which can provide a basis for traffic signal control at the intersection through the analysis of the recorded data of passing vehicles at the checkpoint. [0004] To achieve the above object, the present invention adopts the following technical solutions: [00...
Claims
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CPCG08G1/08
Inventor 宋志洪石勇吕红振梁子君
Owner 安徽畅通行交通信息服务有限公司