Method and device for simulating time-varying traffic state of urban express road network

Abstract

The invention discloses a method and a device for simulating a time-varying traffic state of an urban express road network, and relates to the technical field of traffic, and the main purpose thereofis to reproduce the process of forming and dissipating traffic congestion of a road network, and at the same time, evaluate the implementation effect of traffic control measures. The method comprises:collecting road network information of an urban express road and coil inspection data of each section in the road network, and obtaining an all-day travel distribution table and a time-varying splitratio; determining a road section capacity of the road network according to the coil inspection data, and constructing a road network model of the an urban express road according to the road network information and the preset road network model building software; importing the road network model, the all-day travel distribution table, the time-varying split ratio, and the preset vehicle attributesinto the simulation software of the preset dynamics traffic simulation model, and inputting the traffic capacity to the road network attribute information of the road network model to construct a dynamic traffic simulation model of the urban express road. The invention is applicable to the simulation of the time-varying traffic state of the urban express road network.

Description

technical field [0001] The invention relates to the field of traffic technology, in particular to a method and device for simulating time-varying traffic states of an urban expressway network. Background technique [0002] Urban expressway is the main skeleton of urban road traffic network, which undertakes a large number of urban motorized travel. However, under the background of the rapid development of social economy and motorization process, the growth rate of motor vehicle traffic demand in some cities far exceeds expectations, and the traffic conditions of urban expressways are gradually congested, especially when traffic emergencies (such as bad weather, traffic accidents, When highway construction accidents, etc.) occur, the efficiency and service level of road traffic operation will drop significantly. Urban expressway congestion not only causes traveler time and economic loss, but also causes environmental pollution and energy waste. [0003] At present, in the p...

AI Technical Summary

Problems solved by technology

However, although the macroscopic four-stage traffic model can present the traffic conditions of the overall urban expressway network, it can only reflect the average level of the traffic conditions during the analysis period, and cannot simulate the changes in the time dimension of the traffic conditions that are particularly important for traffic management. process

Although the micro-traffic simulation model can describe time-varying traffic conditions, the defects in the route selection model make it difficult to apply to large-scale road networks. At the same time, the calculation amount of the micro-traffic simulation model is proportional to the number of simulated vehicles, and its computational efficiency is also difficult. Suitable for urban expressway network with huge traffic

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