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Method for determining dynamic speed limit value of highway road section based on visibility meter

A technology of visibility meter and dynamic speed limit, which is applied in the direction of instruments, arrangement of variable traffic indications, traffic control systems of road vehicles, etc., can solve problems such as unreasonable speed, impracticality, and inability for drivers to provide reasonable speed limit values. , to achieve the effect of reducing hidden dangers and improving driving safety.

Inactive Publication Date: 2016-09-07
ANHUI SUN CREATE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defects of the 85% quantile speed method are as follows: first, the whole method assumes that the driver has the ability and willingness to choose an appropriate speed; however, in fact, the driver is often forced to Choose an unreasonable speed, resulting in traffic accidents
Second, this method uses past traffic data as the basic data, which is not practical for new roads and other occasions without past data
However, the expressway is a complex dynamic system under the interaction of people, vehicles, roads and the environment. Speed ​​schemes cannot provide drivers with reasonable speed limits in changing road traffic environments

Method used

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  • Method for determining dynamic speed limit value of highway road section based on visibility meter
  • Method for determining dynamic speed limit value of highway road section based on visibility meter
  • Method for determining dynamic speed limit value of highway road section based on visibility meter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Select a test road section on the Hefei Ring Expressway, install and calibrate the visibility meter according to the relevant provisions of the "Forward Scatter Visibility Instrument Observation Specifications (Trial)", and carry out data return work through communication services. Due to the large number of cross-border vehicles in this test section, large trailer-type vehicles account for a large proportion of vehicle types, so dynamic speed limits are required.

[0067] Take the 10-minute average value of a certain period for example calculation, the visibility of this period is 100m, and the response time t is 2.5s. Of course, 2.5s is an ideal value. In practical applications, 3.0s can be selected for safety redundancy considerations. Referring to Table 1, the trailer-type large vehicles belong to the column of articulated trackless vehicles, so the vehicle braking deceleration can be selected as 4.5m / s 2 . Get the dynamic speed limit value v:

[0068] ...

Embodiment 2

[0073] Select another test section on the Hefei Ring Expressway, install and calibrate the visibility meter according to the relevant provisions of the "Forward Scatter Visibility Instrument Observation Specifications (Trial)", and carry out data return work through communication services.

[0074] Take the 10-minute average value of a certain period for example calculation, the visibility of this period is 50m, and the response time t is 2.5s. Due to the large proportion of small vehicles in this test road section, the value in the "Other Vehicles" column in Table 1 is taken when the vehicle brakes and decelerates, which is 5.0m / s 2 ; Of course, this value is the average deceleration that is fully released, that is, the braking deceleration when the brakes are stepped on. In practical applications, it can be properly set to a value lower than this value.

[0075] Through the calculation formula of the dynamic speed limit value v, it can be known that:

[0076] ...

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Abstract

The invention relates to the technical field of highway traffic safety management, and specifically to a method for determining the dynamic speed limit value of a highway road section based on visibility meters. The method includes the steps of determining a speed limited road section of a highway, selecting the addresses of the visibility meters, arranging, installing and calibrating the visibility meters, returning real-time visibility data, and calculating the dynamic speed limit value. The visibility meters monitor visibility of a highway on a real-time basis, and a reasonable safety driving speed is determined according to the visibility as a speed limit value. In this way, occurrence of traffic accidents can be prevented, and driving safety can be improved.

Description

technical field [0001] The invention relates to the technical field of expressway traffic safety management, in particular to a method for determining a dynamic speed limit value of an expressway section based on a visibility meter. Background technique [0002] Highway traffic safety is very serious. The number of fatalities per 100 kilometers is 5-6 times that of ordinary roads, and direct property losses account for more than 40% of the total. Among them, speeding and large speed dispersion are one of the main reasons for frequent highway traffic accidents in my country. A scientific and reasonable speed limit can keep the driver's driving speed within the safe range allowed by the current road traffic environment, thereby improving road driving safety. At present, the traditional speed limit determination methods are mainly divided into the design speed method and the 85% percentile speed method. The design speed method has been widely used in our country. Its design id...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08G1/01G08G1/09
CPCG08G1/0137G08G1/09
Inventor 邹娇孙晓静董婉丽杨灿
Owner ANHUI SUN CREATE ELECTRONICS
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