Path dynamic grading method of intersection group surrounding express way entrance ramp

Abstract

The invention relates to a path dynamic grading method of an intersection group surrounding an express way entrance ramp. The method comprises the following steps: 1) determining an intersection groupsurrounding the entrance ramp; 2) computing traffic time sequence similarity of an approach of each intersection in the intersection group and the entrance ramp; and 3) and clustering the paths in the intersection group by taking the traffic time sequence similarity of each intersection and the entrance ramp, the distance between the intersection and the entrance ramp, and the intersection traffic as the feature vectors of the intersection approach, classifying path level as the traffic control reference base. Compared with the prior art, the limitation that the intersection group surroundingthe ramp is unconsidered since the collaborative control on the ramp and the ground intersection only consider the joint intersection is broken, a more comprehensive control range is proposed for theintersection group adjacent to the ramp; the grading control is adopted on the path in the region on the partition basis, a more precise control policy is proposed; the original data is analyzed based on de-noising, and the short-time change feature of the traffic stream is highlighted.

Description

technical field [0001] The invention relates to a method for grading traffic paths, in particular to a method for dynamically grading paths in intersection groups around entrance ramps of expressways. Background technique [0002] When implementing coordinated control of signal lights on a large-scale traffic network, the target network is often divided into several control sub-areas, and the traffic sub-areas are controlled separately. seldom involved, because different paths in the same control sub-area play different roles, some paths need to bear a large amount of traffic flow, some paths are relatively secondary, and in the case of limited road resources, the first Regulating the critical path is the most efficient way. Therefore, it is of great significance to perform hierarchical positioning on different paths in a control sub-area. [0003] In addition, as more and more cities in our country have established urban viaducts, there will often be unbalanced resource u...

AI Technical Summary

Problems solved by technology

[0003] In addition, as more and more cities in my country have established urban viaducts, there will often be unbalanced resource utilization and low traffic efficiency between the ground road network and the express road network. Therefore, the coordinated management and control of the two networks It is very important, and the ramp, as the interface between the two networks, is the most prone to congestion, and there is a high probability that the congestion will spread to the surrounding intersections, which will have a great impact on the traffic of the ground road network

The existing research on the coordinated control of ramps and ground traffic is basically about the coordinated control of ramps and connecting intersections, but in fact, once a ramp is congested, the scope of influence is often not limited to a connecting intersection, but rather It may affect the traffic in the surrounding area. Therefore, it is necessary to comprehensively consider the ramp and the surrounding intersection groups for management and control

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