A method for judging the collision probability of motor vehicles at unsignalized intersections
A technology of conflict probability and intersection, applied in the field of judging the probability of motor vehicle conflict at unsignalized intersections
Active Publication Date: 2017-10-20
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
[0003] It can be seen that there are certain deficiencies in the existing methods for calculating the conflict probability of motor vehicles at unsignalized intersections
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[0077] The present invention will be further described below in conjunction with specific examples.
[0078] Such as figure 1 As shown, the non-signalized intersection motor vehicle conflict probability judging method described in the present embodiment includes the following steps:
[0079] 1) Select the researched intersection and obtain the basic information, including four aspects of information in total: intersection geometric information, intersection traffic management strategy, intersection traffic flow data and vehicle-related parameters;
[0080] 2) Evenly divide N grid cells on the design graph of the selected intersection and perform approximate processing, and use the probability of a vehicle appearing at the center of each grid cell as the probability of a vehicle appearing in the grid cell;
[0081] 3) Calculate the probability of vehicles appearing in each flow direction, and assign values to the internal grid; first, determine the trajectory of the vehicle ...
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The invention discloses a no-signalized-intersection motor vehicle conflict probability determining method, and the method comprises the steps: 1), selecting a research intersection, and obtaining the geometrical information of the intersection, the traffic management strategy of the intersection, the traffic flow data of the intersection, and the related parameters of a vehicle; 2), uniformly dividing N grid units on a design graph of the selected intersection, carrying out approximate treatment, and enabling the probability of vehicle appearing at the center of each grid unit to serve as the probability of vehicle appearing of the grid unit; 3), calculating the appearing probability of each vehicle, and assigning a value to an internal grid; 4), determining the conflict probability of any grid unit in the range of the intersection, solving two or more flow probabilities according to the result obtained at step 3), and reassigning values to the grids; 5), outputting a final assignment result of the conflict probabilities of all grids of the intersection. The method can solve a problem of the conflict probability of an internal area of the whole intersection.
Description
technical field [0001] The invention relates to the technical field of urban road intersection safety design and evaluation, in particular to a method for judging the collision probability of motor vehicles at unsignalized intersections considering the driving area of physical vehicles. Background technique [0002] Intersection is the "bottleneck" of urban traffic operation, and its safety has always been the focus of people's attention. Intersection conflict analysis and safety evaluation have become a very important content in the field of traffic engineering research. At present, the methods for calculating the conflict probability of motor vehicles at intersections can be mainly divided into two categories: 1) Shen Jiajun and others use the probability density distribution function of the time headway of motor vehicle flow and the critical gap as the main parameters to establish a conflict probability model between motor vehicles and motor vehicles, Integral solution;...
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IPC IPC(8): G08G1/01
CPCG08G1/0125
Inventor 马莹莹秦筱然陈枝伟马赟赟曹宇超石一飞
Owner SOUTH CHINA UNIV OF TECH