Optimized layout method of road section traffic monitors

Abstract

The invention discloses an optimized layout method of road section traffic monitors. The method comprises the following steps: firstly, establishing a travel time error estimation model of vehicles ona road section L, and calculating travel time estimation errors of M vehicles on the road section L; establishing an optimized layout 0-1 integer programming model of road monitor and converting theoptimal monitor layout problem when the travel time estimation errors of M vehicles on the highway section L are minimum into the shortest path problem when the travel time estimation errors of the directed graph are minimum; and solving the shortest path when the travel time estimation error of the directed graph is minimum, wherein the node position corresponding to the shortest path is the optimal layout position of the monitor. According to the invention, on the premise that the number of the detectors is given, the optimal arrangement position of the traffic detectors can be optimally selected, the minimum estimation error of the whole journey time of the road section is ensured, the monitoring accuracy of the traffic monitor is improved, and the economical efficiency is very high.

Description

technical field [0001] The invention belongs to the technical field of intelligent traffic information collection, and in particular relates to an optimal layout method of traffic monitors on road sections. Background technique [0002] With the development of emerging technologies such as sensor technology, computer technology, and big data, it is possible to collect high-precision traffic spatio-temporal data in real time. In the smart traffic architecture system, traffic monitoring provides a basic data collection network for road users and traffic management departments by optimizing the deployment of traffic monitors such as microwave, video, and geomagnetic monitoring; therefore, traffic monitoring is the underlying foundation of smart traffic architecture. It is the tactile perception network of the intelligent transportation system and one of the core contents of realizing intelligent transportation. At present, the real-time dynamic data collection of highway traff...

AI Technical Summary

Problems solved by technology

Under the premise of a given number of traffic monitors, the present invention converts the 0-1 integer programming model for the optimal layout of road section traffic monitors into the shortest path solution algorithm, optimizes the optimal location of traffic monitor layout, and ensures that the entire road section Minimize the error of travel time estimation; solve the problem of large error in traffic state estimation of road sections based on empirical layout, and improve the monitoring accuracy of road monitors

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