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Urban road intersection postinstallation evaluation index system based on floating car data

A technology for intersections and roads, applied in the field of urban road intersection operation evaluation index system, can solve the problems of single evaluation means and inability to dynamically identify the status, and achieve the effect of simple index calculation

Inactive Publication Date: 2018-11-13
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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AI Technical Summary

Problems solved by technology

Since the detection equipment is fixed, it is impossible to dynamically identify the state of the road in all directions at the intersection, and the evaluation method is single, so there are many deficiencies

Method used

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  • Urban road intersection postinstallation evaluation index system based on floating car data
  • Urban road intersection postinstallation evaluation index system based on floating car data
  • Urban road intersection postinstallation evaluation index system based on floating car data

Examples

Experimental program
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specific Embodiment approach

[0042] 1. Floating car data collection

[0043] Use the on-board device or taxi-hailing software installed on taxis and online car-hailing vehicles to collect real-time movement status information of floating cars, including vehicle id, vehicle latitude and longitude, vehicle point speed, vehicle running time stamp, etc., and the data is transmitted through wireless network To the central server, the sampling and transmission frequency of data is high frequency and medium frequency (sampling and transmission interval < 5s / time is called high frequency, 5s / time < sampling and transmission interval < 15s / time is called high frequency);

[0044] 2. Map road network information extraction

[0045] Through the API interfaces provided by map manufacturers such as Google, Baidu, and Gaode, extract the constituent elements in the map road network (the road sections in the map road network are composed of multiple links), including road section links, intersection nodes, etc., and use ...

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Abstract

The invention discloses an urban road intersection signal control optimization method. The method comprises the steps: calculating a delay index, an unbalance index, a saturation index and an overflowindex through floating car data collection and map road network information extraction; quickly and accurately judging current operation states of urban road intersections through a postinstallationevaluation index system containing the indexes. Thus, support is provided for implementing accurate traffic signal control measures, and the purposes of improving urban intersection traffic efficiencyand relieving traffic jam are achieved.

Description

technical field [0001] The invention relates to the field of urban intelligent traffic control, in particular to an urban road intersection operation evaluation index system based on floating car data. Background technique [0002] At present, the evaluation of the operating status of urban road intersections is mainly realized by means of estimation and other methods by using data such as vehicle flow and occupancy detected by fixed detection equipment such as induction coils, geomagnetic or video detection equipment. Since the detection equipment is fixed, it cannot dynamically identify the state of the road in all directions at the intersection, and the evaluation method is single, so there are many deficiencies. Utilizing the dynamic characteristics of floating cars and establishing a rich and accurate evaluation index system can improve the accuracy of the evaluation of intersection operation status, which is an important support for improving the efficiency of traffic ...

Claims

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Application Information

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IPC IPC(8): G08G1/01G08G1/07
CPCG08G1/0112G08G1/07
Inventor 张立立王力戴晓东张海波何忠贺李敏
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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