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High-grade road multi-bottleneck-point congestion evolution space-time range identification method

An identification method and bottleneck point technology, applied in the field of traffic control and management, can solve the problem that the congestion spreading mode cannot be effectively detected

Active Publication Date: 2015-07-15
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, based on the balance between cost and efficiency, in the road network, the arrangement density of traffic flow detection equipment is about one every 300-1000 meters, and the congestion spreading mode between equipment cannot be effectively detected

Method used

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  • High-grade road multi-bottleneck-point congestion evolution space-time range identification method

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Embodiment 1

[0066] 1. The multi-bottleneck point congestion evolution space-time range identification method proposed by the present invention is applied to figure 2 In the multi-bottleneck area road section shown, the multi-bottleneck area includes 3 off-ramps and an up-ramp, and 8 sets of double-coil traffic flow detection equipment are arranged. The average layout spacing of traffic flow detection equipment is about 400m, and the data collection interval is 20s. Its specific geometric layout and location of traffic flow detection equipment are as follows: figure 2 shown. The time period for congestion evolution recognition is from 5:00 to 24:00.

[0067] 2. In this embodiment, the minimum threshold of vehicle average speed Take it as 45km / h, the highest threshold of road occupancy Take it as 25%.

[0068] 3. At 10:54:00, the traffic flow data read by the traffic flow detection device 7 is, , , . According to the double-threshold method, it was found that , , it can ...

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Abstract

The invention discloses a high-grade road (highway and city expressway) multi-bottleneck-point congestion evolution space-time range identification method and aims to overcome the defect that in existing road bottleneck congestion evolution range identification, mutual influence among multiple bottlenecks cannot be identified. The method comprises the steps of: firstly, carrying out traversing and operation on data in time and space on the basis of data acquired by traffic flow detection equipment in a multi-bottleneck region; according to a traffic flow theory building algorithm, carrying out real-time operation and reproduction on boundaries of traffic flow congestion and dissipation and simultaneously, identifying and judging relevance among bottleneck points in the region; and finally, obtaining a complete congestion evolution space-time range in the multi-bottleneck-point region.

Description

technical field [0001] The invention belongs to the field of traffic control and management. More specifically, the invention relates to a method for identifying the complete temporal and spatial scope of road multi-bottleneck congestion evolution based on limited traffic flow data. Background technique [0002] With the development of the economy and the continuous expansion of the city scale, the contradiction between the demand and supply of urban traffic becomes more and more prominent, and the problems of traffic congestion and environmental pollution become more and more serious. Finding efficient means to deal with traffic congestion is one of the main issues in the field of contemporary traffic engineering. [0003] With the rapid urbanization and motorization process in my country, the distance between the entrances of continuous flow facilities on high-grade roads (expressways and urban expressways) is small, and continuous congestion hotspots can easily form a spr...

Claims

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Application Information

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IPC IPC(8): G08G1/01G08G1/052
CPCG08G1/0104G08G1/052
Inventor 孙剑李铁男李峰陈长李莉
Owner TONGJI UNIV
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