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Speed consistency-considered highway traffic safety evaluation method

A traffic safety and evaluation method technology, applied in the direction of instruments, data processing applications, resources, etc., can solve the problem of not considering speed consistency, and achieve the effect of improving traffic safety level and coordination.

Active Publication Date: 2019-10-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the existing road alignment design does not consider the speed consistency and there are potential safety hazards, and proposes a highway traffic safety evaluation method that considers the speed consistency

Method used

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  • Speed consistency-considered highway traffic safety evaluation method
  • Speed consistency-considered highway traffic safety evaluation method

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Experimental program
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specific Embodiment approach 1

[0024] Specific implementation mode one: combine figure 1 Describe this embodiment, the concrete process of a kind of expressway traffic safety evaluation method that considers speed consistency in this embodiment is:

[0025] Step 1. Organize road alignment data;

[0026] Step 2, dividing road segments according to the road alignment data;

[0027] Step 3. Select the desired speed;

[0028] Step 4. Predict the speed of each road section;

[0029] Step 5. Predict the acceleration and deceleration between each road section according to the acceleration formula under different conditions;

[0030] According to the acceleration and deceleration, adjust the running speed of the straight line section predicted in step 4 to obtain the final running speed curve;

[0031] Step 6: Perform speed consistency evaluation on the final running speed curve segment obtained in Step 5.

specific Embodiment approach 2

[0032] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the road alignment data is sorted out in the step 1; the specific process is:

[0033] Road alignment data include: plane alignment data, longitudinal section alignment data;

[0034] Planar alignment data mainly include: straight line road section, transition curve road section and circular curve road section data;

[0035] The data of the straight road section includes: starting and ending point numbers;

[0036] The data of the circular curve road section includes: the start and end point stake numbers, and the radius of the circular curve;

[0037] The data of the transitional curve road section includes: the start and end point stake numbers, the radius of the connected circle curve;

[0038] Alignment data of the profile mainly include: slope change points and vertical curves of the profile;

[0039] The data of the slope change point includes: the pile number of the slope change poin...

specific Embodiment approach 3

[0042] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in the step two, road sections are divided according to the road alignment data; the specific process is:

[0043] Step 21, divide the straight road section and the horizontal curve road section with the plane alignment data, sort out the starting point number, the end point number, the flat curve radius of the straight road section and the flat curve road section respectively;

[0044] The horizontal curve road section includes a transitional curve road section and a circular curve road section;

[0045] Step 22, divide the straight section and flat curve section divided by the step 21 again with the longitudinal section alignment data, and divide the section into: straight section, flat curve section, combination section of horizontal curve and vertical curve (i.e. vertical curve starting point pile number or The terminal chainage is included in the start and e...

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Abstract

The invention discloses a speed consistency-considered highway traffic safety evaluation method and relates to an expressway traffic safety evaluation method. The invention aims to solve the problem that the existing road alignment design does not consider the speed consistency, so that the road alignment design has potential safety hazards. The method comprises the steps of 1, arranging road alignment data; 2, dividing road sections according to the road alignment data; 3, selecting an expected vehicle speed; 4, predicting the speed of each road section; step 5, predicting acceleration and deceleration among the road sections according to acceleration formulas under different conditions; adjusting the running speed of the straight line section predicted in the step 4 according to the acceleration and deceleration to obtain a final running speed curve; and 6, carrying out speed consistency evaluation on the final operation speed curve segment obtained in the step 5. The method can be applied to the field of highway traffic safety evaluation.

Description

technical field [0001] The invention relates to a highway traffic safety evaluation method. Background technique [0002] With the rapid development of my country's economy, the construction of expressways has also developed rapidly. However, there are still deficiencies in the alignment design of some expressways, which are manifested in the coordination of vehicle speed and alignment, resulting in black spots of accidents on the highway. While exposing the deficiencies in expressway design, it also reflects the pivotal role of alignment design in expressway operation safety, so the safety evaluation of expressway alignment is an essential work. [0003] Patent CN105138733A discloses a two-lane highway traffic safety evaluation method based on driving comfort. This method is based on the driver comfort cooperative oscillation model, and analyzes the comprehensive influence of human, vehicle, road and environmental factors on the change of driver's heart rate. The optimized...

Claims

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Application Information

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IPC IPC(8): G06Q10/06
CPCG06Q10/0639
Inventor 马艳丽田佳佳蒋贤才常梦雪朱洁玉
Owner HARBIN INST OF TECH
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