Speed safety factor-based method for determining road limited speed value

A technology of safety factor and speed limit value, applied in the field of road traffic management and road traffic safety, it can solve problems such as high subjective experience requirements, few factors to consider, and conservativeness.

Inactive Publication Date: 2010-05-26
SOUTHEAST UNIV
View PDF0 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The design speed method is simple and easy to implement, but there are few factors to consider, high requirements for subjective experience, and there is a problem of "one size fits all" for all road sections. In this way, the speed limit may be conservative on road sections with good conditions; 85% percentile The speed of the vehicle is based on statistics and considers the situation of most veh

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Speed safety factor-based method for determining road limited speed value
  • Speed safety factor-based method for determining road limited speed value
  • Speed safety factor-based method for determining road limited speed value

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0055] A method for determining the highway speed limit value based on the speed safety factor provided by the present invention is realized in this way:

[0056] (1) Collect the basic data of the road, the basic data of the road include: flat curve radius R h (m), vertical curve radius R v (m), road surface friction coefficient (unitless), lateral friction coefficient (no unit), longitudinal slope i v (no unit, uphill is positive, downhill is negative), road cross slope i h (No unit, it is positive when it is beneficial for the vehicle to drive on a horizontal curve, otherwise it is negative), sight distance S(m);

[0057] (2) Calculate the maximum axial travel speed V respectively cs 1 , the maximum lateral speed V cs 2 and the maximum vertical travel speed V cs 3 , the maximum axial travel speed V cs 1 The calculation method is:

[0058]

[0059] The maximum lateral travel speed V cs 2 The calculation method is:

[0060]

[0061] The maximum vertical...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a speed safety factor-based method for determining a road limited speed value, which comprises the following steps: collecting basic data, namely design parameters of plane and vertical lines of a road; in three dimensionalities of an axial direction, a horizontal direction and a longitudinal direction, calculating the highest running speed of the road; selecting a proper speed safety factor for each dimensionality; dividing the highest running speeds in the three dimensionalities by the speed safety factors to obtain optical limited speeds of the three dimensionalities, and selecting the minimal value of the three limited speed values as an upper limit of a limited speed aggregate to obtain an initially determined limited speed value; and preferring a limited speed according to the expected speed of a driver. The limited speed value determined by the method reflects the quality of a driving condition, a safety space is reserved, and the driver is easy to observe the limited speed value.

Description

technical field [0001] The invention relates to a method for determining a highway speed limit value, in particular to a method for determining a highway speed limit value based on a speed safety factor, which can be used to set the speed limit value for road vehicles to achieve the purpose of improving driving safety. The invention belongs to the field of highway traffic management and highway traffic safety. Background technique [0002] The speed limit of road vehicles is an important measure to improve the safety of road traffic, ensure the smooth flow of roads and improve the efficiency of road traffic. A reasonable speed limit value should be able to reflect the pros and cons of driving conditions, and meet the driver's expectations as much as possible, and serve the purpose of assisting the driver to choose a vehicle speed that is suitable for the driving conditions; too high a speed limit value will cause vehicle speed dispersion If the speed limit is too large, it ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G08G1/052
Inventor 陆建李鑫铭
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap