Method for acquiring mean delay of urban road junction

An intersection and average delay technology, applied in the field of transportation, can solve problems such as difficulty and deriving speed, and achieve the effects of simple calculation, high reliability and fast calculation speed.

Inactive Publication Date: 2010-07-14
TONGJI UNIV
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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 ve

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  • Method for acquiring mean delay of urban road junction
  • Method for acquiring mean delay of urban road junction
  • Method for acquiring mean delay of urban road junction

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[0029] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0030] The present invention only needs to rely on virtual detectors with two cross-sections and does not need to rely on other parameters, and adopts the principle of "one-to-one correspondence" to match the vehicles detected in the exit detection area with the detection results in the entrance detection area, and calculate each The transit time of a vehicle from the entrance detection area to the exit detection area, so that the delay value of each vehicle can be calculated, and the calculation method adopted can effectively eliminate the cumulative error between cycles. The input data required by this embodiment is the video collected by the low-altitude camera installed at a height of about 10 meters, the traffic light duration data and the virtual detection frame set by the user.

[0031] figure 1 As shown, in this embodiment, the average...

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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...

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Application Information

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IPC IPC(8): G08G1/01G08G1/065
Inventor 李克平刘富强孙剑李志鹏张姗姗张惠玲苏贵民王沣徐超潘斌
Owner TONGJI UNIV
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