Method for measuring interval between highway detectors

Abstract

The invention discloses a method for measuring an interval between highway detectors. The method comprises the following steps of: 1, acquiring the basic information indexes of a highway, wherein the unidirectional lane number n, the service level, the designed vehicle speed v and the maximum service flow rate k1 of the highway are taken as the basic information indexes; 2, acquiring the normal state flow rate k2 and the abnormal state flow rate k0 of vehicles on the highway; 3, detecting the time t0 of sensing the abnormal event of the highway by the detectors; and 4, measuring the interval between the highway detectors. By the method, the number of the detectors can be reduced and input cost can be lowered under the condition of fully ensuring the detecting effect of the detectors.

Description

technical field [0001] The invention belongs to the field of road equipment layout in traffic engineering, and in particular relates to a method for measuring the layout distance of expressway detectors. [0002] Background technique [0003] With the rapid development of highways, car ownership is also increasing. Traffic congestion, traffic accidents and other problems inevitably appear on expressways, which seriously hinder the pace of its high-speed development. In order to improve the safety and smoothness of expressway operation, it becomes a necessary means to deploy detectors on the expressway to monitor it. If the density of detectors deployed on the expressway is too small, it cannot achieve a good monitoring effect, and if the density is too high, it does not mean that the detection effect is better, and the cost of too many detection equipment is also high. How to effectively determine the detector layout spacing becomes a technical issue. At present, in vari...

AI Technical Summary

Problems solved by technology

If the density of detectors deployed on the expressway is too small, it cannot achieve a good monitoring effect, and if the density is too high, it does not mean that the detection effect is better, and the cost of too many detection equipment is also high. How to effectively determine the detector layout spacing become a technical problem

At present, in various literature researches, the layout spacing of detectors on the expressway can only be proved through multiple experiments, and the detection effect of the detector is used as the target value to select the spacing multiple times, and the spacing value with the best result is selected by comparison , it is generally believed that the detection effect is the best between 200 meters and 700 meters. This method is very cumbersome, and it is only determined from the results of event detection experiments, lacking consideration for various actual conditions

In the actual layout of detectors, the spacing is determined only by experience and cost, which is obviously even more unscientific

Therefore, no matter in terms of theoretical research or practical operation, the selection range of highway detector layout spacing is too large and has no effective basis, and it cannot be specifically determined.

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