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Entrance acceleration lane service level grading method based on VISSIM simulation and lane change conflict

A technology of service level and grading method, applied in data processing applications, instruments, complex mathematical operations, etc., to achieve the effects of low cost of use, improved traffic efficiency, and real and reliable simulation results

Active Publication Date: 2022-06-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to classify the service level of the entrance acceleration lane of the built expressway or urban expressway, and provide a basis for the subsequent road design, transformation and improvement , to solve the current problems of low traffic efficiency and high traffic accident rate in the entrance acceleration lane, and propose a service level classification method for entrance acceleration lanes based on VISSIM simulation and lane change conflicts

Method used

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  • Entrance acceleration lane service level grading method based on VISSIM simulation and lane change conflict
  • Entrance acceleration lane service level grading method based on VISSIM simulation and lane change conflict
  • Entrance acceleration lane service level grading method based on VISSIM simulation and lane change conflict

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specific Embodiment approach 1

[0016] Specific implementation mode 1: In this implementation mode, a method for grading the service level of the entrance acceleration lane based on VISSIM simulation and lane change conflicts. The specific process is as follows:

[0017] Step 1: Combining the specific conditions of the entrance acceleration lane (lane length and width, type of acceleration lane, etc.), determine the simulation parameters;

[0018] Step 2: Use the simulation parameters in step 1 as VISSIM simulation modeling parameters, input the combination of different main line traffic volumes and ramp traffic volumes into the VISSIM simulation modeling software, and output the main line and ramp running trajectories (speed, acceleration, position, etc.);

[0019] Import the trajectory of the main line and the ramp into the traffic conflict analysis software SSAM to analyze the lane change conflict value, and form the correspondence table of the lane change conflict value under the different traffic volume ...

specific Embodiment approach 2

[0022] Specific embodiment two: the difference between this embodiment and specific embodiment one is that in the step 1, in conjunction with the specific conditions of the entrance acceleration lane (lane length and width, acceleration lane type, etc.), the simulation parameters are determined:

[0023] The simulation parameters include: main line speed limit value (for example, expressway operating speed limit 120), ramp speed limit value, ramp single-lane acceleration lane length (ramp is single lane), main line traffic volume, ramp traffic volume, traffic composition (passenger car , medium-sized cars, large-sized cars and the proportion of traffic composition of car trains), vehicle running speed, etc.

specific Embodiment approach 3

[0024] Specific implementation mode three: the difference between this implementation mode and specific implementation modes one or two is that in the step 3, the number of lane change conflicts is comprehensively analyzed, and the value of lane change conflicts is divided into intervals of equal steps and counted; the specific process is as follows :

[0025] Arrange and analyze the corresponding table of lane-changing conflict values ​​obtained in step 2, and find the maximum and minimum conflict numbers in the corresponding table of lane-changing conflict values ​​as max and min respectively;

[0026] Set the step size b (b≤3), and divide the conflicting values ​​into [min,min+b], (min+b,min+2b]...(max-b,max]([min,min+b] ], (min+b, min+2b]...(max-b, max] total t groups) in the t group of intervals, and count the number of data y classified into each interval, and form the abscissa as the interval median The number x and the ordinate are the relationship table of the number...

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Abstract

The invention discloses an entrance acceleration lane service level grading method based on VISSIM simulation and lane changing conflicts, and relates to the entrance acceleration lane service level grading method based on the VISSIM simulation and the lane changing conflicts. The invention aims to grade the service level of the entrance acceleration lane of the built expressway or the urban expressway, provide a basis for the subsequent road design and improvement, and solve the problems of low traffic efficiency, high traffic accident rate and the like of the existing entrance acceleration lane. The method comprises the following steps: 1, determining simulation parameters; 2, main line and ramp moving tracks are output; a lane changing conflict value corresponding table under different traffic volume combinations of the main line and the ramps is formed based on the lane changing conflict values; 3, determining a ramp entrance acceleration lane service level grading threshold value; and 4, drawing an entrance acceleration lane service level grading table under different traffic volume combinations. The method is applied to the field of expressway or urban expressway design.

Description

technical field [0001] The invention belongs to the field of expressway or urban expressway design, and in particular relates to a method for grading the service level of an entrance acceleration lane based on VISSIM simulation and lane change conflict. Background technique [0002] With the rapid development of economy and society, the construction of highways and urban expressways is in full swing. However, with the increase of traffic volume in the later period, its traffic capacity has been overwhelmed, which seriously reduces the service level of the original design. Especially at the merging of the entrance acceleration lane, because of the large traffic volume and the large difference between the running speed of the main line and the merging speed of the ramp, it is easy to cause traffic accidents and reduce the traffic capacity and service level. Therefore, in order to improve the service level of the entrance acceleration lanes, it is first necessary to classify t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/26G06F17/16G06F17/18
CPCG06Q10/06393G06Q10/067G06Q50/26G06F17/16G06F17/18Y02T10/40
Inventor 孟祥海魏鹏儒邱志雄黄兰
Owner HARBIN INST OF TECH
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