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Expressway section real-time flow estimation method based on portal data

A real-time traffic and expressway technology, applied in the field of traffic engineering, can solve the problems of difficulty in obtaining the traffic flow at the entrance and exit of the ramp, affecting the accuracy of the traffic flow estimation of the expressway section, and the limited layout of vehicle detectors, so as to meet the needs of operation and management. Effect

Pending Publication Date: 2022-06-07
KUNMING UNIV OF SCI & TECH
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  • Claims
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AI Technical Summary

Problems solved by technology

However, due to the limited deployment of vehicle detectors on expressways, there are no vehicle detectors installed on many entrance and exit ramps, which makes it difficult to obtain the traffic flow at the entrance and exit of the ramp, which seriously affects the accuracy of traffic flow estimation on expressway sections.

Method used

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  • Expressway section real-time flow estimation method based on portal data
  • Expressway section real-time flow estimation method based on portal data
  • Expressway section real-time flow estimation method based on portal data

Examples

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Embodiment 1

[0031] A real-time traffic estimation method for highway sections based on gantry data, such as figure 1 shown, including the following steps:

[0032] (1) Section division

[0033] Taking the data collected by a highway gantry in Yunnan Province in January 2021 as an example for analysis, the highway gantry is used as the basic section division unit, and the section between two adjacent gantry is the research section, such as figure 2 , the entrances and exits in the observed road section may be toll booths or interchanges;

[0034] (2) Data quality control

[0035] Determine the data source required for real-time traffic estimation of the road section, collect the traffic flow data of the road section with a sampling period of 1min, and construct the road section database in combination with the design speed of the road section, the gantry and the position of the entrance and exit;

[0036] Since there are many uncontrollable factors in the data collection process of the...

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Abstract

The invention discloses an expressway road section real-time flow estimation method based on portal data, and the method comprises the steps: taking an expressway ETC portal as a basic road section division unit, and taking a road section between two adjacent portals as a flow estimation road section; the method comprises the following steps: collecting road traffic flow data by taking 1 min as a sampling period, and constructing a road flow estimation historical database in combination with static data such as design vehicle speed, portal and entrance and exit positions of a road; average travel time is determined according to historical data of a road section, average speed is calculated through the average travel time of the road section, then vehicle passing time under the average speed is calculated, and a statistical time period of road section flow estimation is determined according to the vehicle passing time. The current traffic flow of the road section is the sum of the number of vehicles recorded by the upstream portal and the net entrance and exit inflow traffic flow in the statistical time period; the highway real-time traffic flow estimation method is constructed, highway managers are supported to formulate dynamic management measures, and better travel service is provided for highway travelers.

Description

technical field [0001] The invention belongs to the technical field of traffic engineering, and in particular relates to a method and system for estimating real-time traffic flow in a highway section based on gantry data. Background technique [0002] In recent years, with the continuous improvement of my country's national economic level, the construction and operation of expressways has been in a state of rapid development, and the traffic flow on expressways has also increased year by year. Especially during holidays, expressway congestion occurs frequently. Therefore, it can reflect the traffic status of the expressway in a timely and intuitive manner, estimate the traffic flow of the expressway section accurately in real time, and manage and control the expressway scientifically and effectively on this premise, becoming the intelligent traffic management of expressways and providing better quality for expressway users services and relieve highway congestion. [0003] A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01G08G1/052G08G1/065
CPCG08G1/0129G08G1/0137G08G1/052G08G1/065
Inventor 戢晓峰王涛覃文文鄢祺阳戴秉佑
Owner KUNMING UNIV OF SCI & TECH
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