Urban expressway interleaving area dynamic influence range calculation method based on VISSIM simulation

Abstract

The invention discloses an urban expressway interleaving area dynamic influence range calculation method based on VISSIM simulation, which comprises the following steps: firstly, constructing a VISSIM simulation model according to design parameters of an urban expressway interleaving area and upstream and downstream road sections thereof, and selecting proper driving behavior parameters and simulation parameters; inputting different main road driving-in traffic volume data and main-main traffic volume to main road driving-in traffic volume proportion data to carry out traffic simulation, and extracting traffic flow running speed parameters of each lane on the data acquisition points; then drawing a position-speed scatter diagram under each simulation condition, and defining the influence range of each lane under the condition according to a defining method; and finally, drawing scatter diagrams of different traffic conditions and corresponding interlaced area influence ranges, fitting to obtain a function relationship, and obtaining a formula for calculating the dynamic influence range. The method for calculating the influence range of the urban expressway interleaving area under different design parameters and different traffic conditions is provided, and a research basis is provided for traffic organization of the urban expressway interleaving area.

Description

technical field [0001] The invention relates to a VISSIM simulation-based calculation method for a dynamic influence range of an urban expressway weaving area, and belongs to the technical field of research on the influence range of an urban expressway weaving area. Background technique [0002] Urban expressway is an extremely important part of the urban road network, while the weaving area connects the expressway and other urban roads in series, and is an important part that affects the expressway capacity and operating speed. In the road sections before and after the entrance and exit of the weaving area of ​​urban expressways, the driver will adjust the running state of the vehicle according to the actual situation of the weaving area and his own driving needs, resulting in a large dispersion of vehicle speed in the road section and an increase in lane changing behavior, which affects the speed of the expressway. Road traffic flow operation status and traffic safety leve...

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Problems solved by technology

[0003]Referring to the U.S. "Traffic Capacity Handbook", the influence range of the existing weaving area is defined by specific values, which does not take into account the geometric structure differences and real-time Differences in traffic conditions

In addition, the design speed of urban expressways is relatively high, and the traffic volume is relatively large. There are certain difficulties in traffic surveys, and it is difficult to collect data under all traffic conditions.

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