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Expressway speed limit control method based on time stability

A control method and expressway technology, applied in the arrangement of variable traffic indications, etc., can solve the problems of lack of time stability of speed limit control, large difference of speed limit value, and large change of speed limit control, so as to reduce the time and cost. The effect of stability, reducing running speed and improving traffic safety

Active Publication Date: 2019-07-19
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are obvious defects in existing control methods
In the existing dynamic speed limit control process, only the large difference in the speed limit value of the upstream and downstream sections is considered, which leads to the sudden deceleration of the vehicle during operation, but it lacks the consideration of the time stability of the speed limit control
Speed ​​limit control is a multi-cycle process. If the speed limit control changes too much in the same road section in two adjacent time periods, it will also cause a sudden change in the speed of the vehicle during operation, thereby causing serious safety hazards. The existing speed limit control is lacking in Research on Temporal Stability

Method used

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  • Expressway speed limit control method based on time stability
  • Expressway speed limit control method based on time stability
  • Expressway speed limit control method based on time stability

Examples

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Embodiment

[0070] figure 2 Shown is a one-way three-lane (two-way six-lane) expressway. The meanings of the labels in the figure are: 1-control center, 2-roadside information board, 3-road section detector. The expressway is controlled by the present invention.

[0071] Step 1, divide the expressway into 3 road sections in total, each road section is numbered i=1, 2,...,I, I=3, set roadside information boards and road section detectors on each road section, and the detectors collect traffic data Information, sent to the control center, the length of the road section L i Both are 1km.

[0072] Step 2: Divide the total duration of the speed limit control into T cycles, where t is the sequence number of the cycle, t=1, 2, ..., T, T=3. In the t=1st cycle, the control center calculates the speed limit value V at the downstream section i i (1), and released on the roadside information board; the speed limit value V at the downstream first road section i=1 place calculated by the control c...

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Abstract

The invention discloses an expressway speed limit control method based on time stability. According to the method, through cooperative control of an expressway roadside information board, a road section detector and a control center, speed limit control is carried out by utilizing a time stability constraint condition, so that the safety of dynamic expressway speed limit control is improved, and the road traffic accident rate is reduced. The method comprises the following step of detecting and collecting traffic information, determining an alternative speed limit value of each position, selecting an optimal space speed limit function based on the time stability, and determining a final speed limit value. The method is simple in design and easy to calculate; by means of time stability constraint, a defect of existing dynamic expressway speed limit control can be overcome, the time instability of speed limit control is reduced, and the traffic safety of expressways is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of intelligent traffic management and control, and in particular relates to a time-stability-based expressway speed limit control method. Background technique [0002] In recent years, with the rapid development of my country's economy, people's living standards are improving day by day, and the number of motor vehicles is also increasing day by day. According to relevant data from the Ministry of Public Security, as of the end of 2018, the number of motor vehicles in my country reached 325 million, and it still maintains a rapid growth trend. The sharp increase in motor vehicles has brought about a series of social problems such as serious traffic congestion and exhaust emissions, and has also caused a great impact on safety. According to the National Bureau of Statistics, in 2016, the number of traffic accidents nationwide reached 212,846, the total number of traffic accident injuries was 226,430, and the...

Claims

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Application Information

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IPC IPC(8): G08G1/09
CPCG08G1/09
Inventor 李烨黄合来唐进君
Owner CENT SOUTH UNIV
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