Method for determining pedestrian crosswalk width under signal control
A technology of pedestrian crossing and determination method, which is applied to the determination of the width of the pedestrian crossing under signal control. Given the field of the width of the pedestrian crossing, it can solve the problems of not considering the influence of the two-way pedestrian flow on the lateral space of pedestrians crossing the street, and achieve reference and practicality, efficiency and stability. Safety Avoidance, Reduction of Pedestrian Violations
Active Publication Date: 2017-05-31
JILIN UNIV
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to overcome the problem that the existing method for setting the width of a pedestrian crossing does not consider the influence of two-way pedestrian flow on the lateral space of pedestrians crossing the street, and provides a method for determining the width of a pedestrian crossing under signal control
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[0113] In order to verify the effect of the present invention, the crossing behavior of pedestrians at two crosswalks in Changchun City's Hongqi Street during the peak period was photographed at high altitude, and the temporal and spatial information of pedestrians was extracted using video extraction technology to complete the following experiments.
[0114] The survey obtained 4 hours of non-working days and 6 hours of working days, a total of 138 signal periods, of which non-working days and working days accounted for 35% and 65% respectively. The geometric characteristics of the survey locations are shown in the table below.
[0115] Table 1. Characteristic parameters of survey sites
[0116]
[0117] 1. Selection of verification indicators
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The invention discloses a method for determining the pedestrian crosswalk width under signal control, which is aimed at overcoming the problem that the existing pedestrian crosswalk width setting method does not consider the influence of the bi-directional pedestrian flow on the pedestrian horizontal space. The method comprises the following steps that 1, pixel coordinates (x, y) in a pedestrian crossing image and coordinates (v, w) in a rectangular plane coordinate system are converted; 2, the relation between the single side maximum width of the pedestrian crosswalk and the pedestrian sharing rate in each direction is calculated; 3, the maximum widths at two sides of the pedestrian crosstalk are determined and subjected to rounding and optimization: (1) the bi-directional maximum width of the pedestrian crosstalk is determined, (2) the bi-directional maximum width of the pedestrian crosstalk is subjected to rounding and optimization, wherein according to the concrete bi-directional pedestrian sharing rate and the pedestrian flow at the pedestrian crosstalk, the maximum of the maximum width values of all pedestrian ranges obtained by calculation is subjected to upward rounding as the final width of the pedestrian crosswalk, and in the formula Wmax=max{int(W1)+1, int(W2)+1, ... , int(Wk)+1, ... , int(Wn)+1}, Wmax is the maximum width values of the two sides of the pedestrian crosstalk after rounding and optimization, and the unit is m.
Description
technical field [0001] The invention relates to a method for specifying the width of a pedestrian crossing in the technical field of traffic engineering design, more precisely, the invention relates to a method for determining the width of a pedestrian crossing under signal control. Background technique [0002] As an important part of urban traffic, walking has stronger freedom compared with other modes of transportation. Therefore, when crowds cross the street, there will be crowd dispersion, which will lead to changes in pedestrian activity areas. Therefore, the study of the spatial distribution characteristics of pedestrian crossings not only provides a basis for the reasonable setting of pedestrian green light time, but also has important theoretical significance for the optimal setting of the width of pedestrian crossings. [0003] At present, scholars at home and abroad have little research on pedestrian crossing activity areas, mainly focusing on directly starting wi...
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IPC IPC(8): G06T3/60G06F17/50
CPCG06F30/20G06T3/604
Inventor 宋现敏李志慧高雨虹邓晓磊魏巍陶鹏飞
Owner JILIN UNIV
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