Expressway congestion state judgment and traffic flow management and control system and method
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A congested state, expressway technology, applied in the traffic control system of road vehicles, traffic control system, traffic flow detection, etc., can solve the problems of lack of front-end display layer and back-end business processing layer, lack of processing capacity of the system, etc.
Inactive Publication Date: 2021-05-11
SHANDONG UNIV OF SCI & TECH
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In addition, the system mentioned in the above invention lacks a description of the front-end display layer and the back-end business processing layer, and the system lacks corresponding processing capabilities for traffic accidents, emergencies, etc.
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Embodiment 1
[0122] Such as figure 1 As shown, a highway congestion state discrimination and traffic flow control system, including a data acquisition module, a data processing module, a back-end service module and a front-end display module;
[0123] The data collection module is configured to collect traffic flow data at the trunk line of the expressway and vehicle queuing length information at the entrance ramp;
[0124] The data processing module is configured to divide the degree of traffic congestion, determine the congestion state, and perform flow control judgment according to the congestion state;
[0125] The back-end service module is configured to provide a data interface responsible for data interaction and realize data storage, query, and update functions;
[0126] The front-end display module is configured to realize the visual display of traffic conditions and equipment management data of different road sections;
[0127] The data acquisition module collects the traffic f...
Embodiment 2
[0152] On the basis of above-mentioned embodiment 1, the present invention also mentions a kind of expressway congestion status discrimination and traffic flow control method, and its flow process is as follows figure 2 As shown, it specifically includes the following steps:
[0153] Step 1: selection of congestion speed threshold;
[0154] Utilizing the current highway section and ramp service level standards, the design speed is based on the 120km / h highway operation evaluation standard, and the speed congestion is divided into four levels, 04 3 2 1 <120;
[0155] v 1 Indicates unimpeded; v 2 Indicates that it is basically unblocked; v 3 means crowded; v 4 indicates severe congestion;
[0156] Step 2: Transform the speed congestion level into three road operation states;
[0157] Transform the speed congestion level into three road operation states: no congestion, no serious congestion, and severe congestion;
[0158] The speed congestion level is unblocked and basic...
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Abstract
The invention discloses an expressway congestion state judgment and traffic flow management and control system and method, and belongs to the field of intelligent traffic management and control. The system comprises a data acquisition module, a data processing module, a back-end service module and a front-end display module. According to the invention, the road congestion state is divided into three types, i.e., no congestion, no serious congestion and more serious congestion, and the traffic congestion index is calculated in combination with the traffic parameters, such as speed, occupancy and traffic flow, acquired by a system detector; the calculated data are compared with a specific threshold value to obtain an initial pre-judgment result; in order to reduce the misjudgment rate and realize accurate judgment, the system maintains the continuity of detection and carries out pre-judgment for multiple times, and finally completes one-time traffic congestion state evaluation; and finally, vehicle management and control are carried out on an entrance ramp by adopting a hierarchical flow control method so as to relieve the traffic pressure of an expressway main line. According to the method, the traffic congestion state of the expressway can be accurately pre-judged, so that hierarchical flow control is better realized.
Description
technical field [0001] The invention belongs to the field of intelligent traffic management and control, and in particular relates to a system and method for judging congestion state of expressways and controlling traffic flow. Background technique [0002] The rapid development of the economy has led to the overall improvement of the national economy. In recent years, the number of cars owned in my country has increased year by year. The positive impact of this situation is the general improvement of residents' travel efficiency, but the subsequent negative impact is Gradually serious traffic congestion, the phenomenon of highway traffic congestion in my country is particularly serious, especially during holidays and daily travel peak periods, this traffic congestion is even more serious, and has developed into a frequent traffic congestion phenomenon. How to effectively alleviate this kind of expressway congestion, which has gradually grown into a frequent occurrence, has b...
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