Method for acquiring mean delay of urban road junction

Abstract

The invention relates to a method for acquiring the mean delay of an urban road junction. The method comprises the following steps of: (1) double section selection: firstly, respectively mounting a plurality of cameras at an inlet passage and an outlet passenger of a junction, and then drawing a virtual detection frame used for detecting vehicles; (2) vehicle detection and traffic flow counting: carrying out information acquisition by utilizing the virtual detection frame, and carrying out vehicle detection in each frame of an acquired video; (3) queue length calculation: detecting the changes of time headway by adopting the virtual detection frame so as to distinguish queue vehicles and non-queue vehicles; and (4) delay value calculation according to a one-to-one principle: calculating according to last data in a inlet passage detector recording list, adopting a calculation policy and eliminating an accumulated error so as to ensure that an error is controlled within the range of theperiod without influencing other periods. The invention has the advantages of simple and convenient calculation, high operation speed, good stability, high reliability, and the like.

Description

technical field [0001] The invention belongs to the field of transportation and relates to a method in the technical field of intelligent transportation, in particular to a method for acquiring delays at urban road intersections. Background technique [0002] With the rapid development of social economy, on the one hand, the demand for traffic has increased greatly, while the growth of roads has gradually reached its limit, which further intensifies the contradiction between traffic demand and supply; on the other hand, the rapid progress of information technology has brought comprehensive solutions to traffic problems. opportunity. It is against this background that the advanced traffic information management system (ATIMS) has received extensive attention before other systems of the intelligent transportation system (ITS), and has developed rapidly in countries all over the world, and has been applied to dynamic route planning, Dynamic navigation, road network coordinatio...

AI Technical Summary

Problems solved by technology

But as he described in the article, this method relies heavily on the calculation accuracy of the traffic flow and speed of the intersection with a single camera at the intersection. The characteristics of the traffic flow at the intersection are not obvious, especially in my country where the traffic flow is affected by the mixture of people and vehicles. The intersection presents a typical stop wave-start wave type, so it is difficult to accurately derive the speed and obtain an accurate average delay at the intersection through the method proposed in this paper, which restricts this method for intersections with particularly complex traffic flow characteristics. Important reasons to promote

Images