A Recognition Method of Prominent Accident Patterns at Two-Display Signal-Controlled Cross-level Intersections

A technology for displaying signals and plane crossings, which is applied in traffic control systems, traffic control systems for road vehicles, traffic flow detection, etc. It can solve the problems of unclear accident patterns and risks at urban signal-controlled intersections, and improve overall traffic efficiency. The effect of improving the safety level and reducing the delay rate

Active Publication Date: 2020-09-08
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the current lack of identification methods for different accident patterns in urban two-display signal-controlled intersections, which leads to the problem that the risk of accident patterns at urban signal-controlled intersections is not clear

Method used

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  • A Recognition Method of Prominent Accident Patterns at Two-Display Signal-Controlled Cross-level Intersections
  • A Recognition Method of Prominent Accident Patterns at Two-Display Signal-Controlled Cross-level Intersections
  • A Recognition Method of Prominent Accident Patterns at Two-Display Signal-Controlled Cross-level Intersections

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Experimental program
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specific Embodiment approach 1

[0032] Specific implementation mode one: combine figure 1 Describe this embodiment mode, a kind of method for recognizing the outstanding accident form of two-display signal control cross plane intersection described in this embodiment mode, this method is realized through the following steps:

[0033] Step 1. Investigate and count the accident data, road geometric condition data, traffic signal control data and traffic flow data of a certain two-display signal control intersection in the city;

[0034] Step 2, calculating the number of accident chances of the bicycle's own accident at the two display signals controlling the intersection;

[0035] Step 3, calculating the number of accident chances of the rear-end collision accident at the two display signal control intersections;

[0036] Step 4, calculating the number of accident chances of the two display signals controlling the collision accident at the level crossing;

[0037] Step 5, calculating the number of accident cha...

specific Embodiment approach 2

[0042] Specific implementation mode two: this implementation mode further limits the prominent accident pattern recognition method of a two-display signal control cross plane intersection described in the first implementation mode, and step two in this implementation mode is specifically:

[0043] Conditions for single-vehicle accidents: when a single vehicle appears at an intersection, there is a chance of a single-vehicle accident;

[0044] The number of accident chances of a single-vehicle accident at a two-display signal-controlled intersection within a year is equal to the total number of vehicles entering the intersection within a year, and its calculation formula is:

[0045]

[0046] Among them, O 1 is the number of accident chances of bicycle accidents at two signal-controlled intersections within one year; q i is the average arrival number of vehicles at the entrance i of the two-display signal control intersection, the unit is pcu / h, the value range of i is 1 to...

specific Embodiment approach 3

[0047] Specific implementation mode three: combination figure 2 This embodiment is described. This embodiment further limits the two-display-signal-controlled method for identifying prominent accident patterns at cross-plane intersections described in Embodiment 2. Step 3 in this embodiment is specifically:

[0048] Conditions for a rear-end collision: two vehicles are traveling in the same direction and both vehicles appear at the intersection;

[0049] The calculation method of the number of accident chances for a rear-end collision accident at entry 1 is as follows:

[0050] (1) The number of accident chances of rear-end collision accidents between straight traffic flows

[0051] The average time for vehicles going through the intersection at entrance 1 is: The headway of the vehicle conforms to the negative exponential distribution, when the headway t of the two arriving vehicles is less than , there is a chance of a rear-end collision between the two vehicles, and t...

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Abstract

The invention discloses a sudden accident type recognizing method of a two-display-signal controlled cross-shaped intersection, and belongs to the field of intersection accident risk evaluation. The problems are solved that currently, there is a lack of a recognizing method of different accident types of the two-display-signal controlled intersection in a city, and then the accident types and risks at the intersection are not clear, and the corresponding safety improvement measures are not effective enough. Actual survey is utilized to obtain the accident frequencies of single-vehicle self accidents, rear-end collision accidents, clashing accidents, oblique collision accidents, same-direction scraping accidents, and direct-angle collision accidents which occur each year at some road-signal-controlled cross-shaped intersection in the city, and the accident risks of the single-vehicle self accidents, the rear-end collision accidents, the clashing accidents, the oblique collision accidents, the same-direction scraping accidents, and the direct-angle collision accidents are calculated respectively according to the accident opportunity numbers of the single-vehicle self accidents, the rear-end collision accidents, the clashing accidents, the oblique collision accidents, the same-direction scraping accidents, and the direct-angle collision accidents to recognize the sudden accident types of the intersection. The sudden accident type recognizing method of the two-display-signal controlled cross-shaped intersection is applicable to recognizing sudden accident types of the two-display-signal controlled cross-shaped intersection on a city road.

Description

technical field [0001] The invention relates to a prominent accident form recognition method for two-display signal-controlled intersections at plane intersections, and belongs to the field of accident risk assessment at two-display signal-controlled intersections at plane intersections in urban roads. Background technique [0002] With the increasing use of automobiles, traffic accidents have become a serious social problem. According to statistics, 60-70% of traffic accidents in cities occur at level intersections. Therefore, it is very important to improve the traffic safety of the whole city to reduce the occurrence of traffic accidents at level intersections. At present, the intersections of the main roads in the city have adopted the signal control method, which has undoubtedly improved the traffic capacity and driving safety of the intersections. However, traffic accidents of various accident forms are still occurring at today's urban road signal control intersectio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08G1/01
CPCG08G1/0129
Inventor 孟祥海吴佩洁梁心雨刘振博柳昕汝
Owner HARBIN INST OF TECH
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