Traffic dispersion method formulated based on traffic flow assignment distribution difference

Abstract

The invention discloses a traffic dispersion method formulated based on traffic flow assignment distribution difference, and belongs to the technical field of urban traffic management. The traffic dispersion method is a traffic dispersion method in view of the non-emergency traffic state. According to the method, road impedance function scaling factors are determined according to the actual traffic conditions of urban roads and the congestion conditions of each road segment, a road impedance function is established, user flow assignment is quantified to the scaling factors of the road impedance function, and calculation of the scaling factors is performed based on system flow assignment distribution with optimal dynamic system and optimal dynamic users; difference of flow assignment results is compared, and minimum difference is obtained through the specific value of every two flow assignment results; and the scaling factors of each road segment are updated until an optimization objective is achieved or no scaling factors of the road segments require to be optimized and adjusted, user flow assignment is inducted to be dispersed to the optimal system situation of traffic decision makers, stable operation capacity of the system is enhanced and the objective of optimal traffic dispersion is realized.

Description

[0001] Patent field [0002] The invention belongs to the technical field of urban traffic management, and in particular relates to a traffic dredging method formulated based on differences in traffic distribution distribution. Specifically, focusing on the traffic control method under non-emergency traffic conditions, it is proposed to quantify the flow distribution strategy into the proportional factor of the road resistance function, and calculate the proportional factor based on the dynamic system optimal and dynamic user optimal system distribution distribution. Background technique [0003] In the traffic management system, dynamic traffic allocation (hereinafter referred to as DTA) is its theoretical basis. DTA is an algorithm that allocates traffic demand to road sections according to certain optimization principles. [0004] Optimization principles include: Dynamic User Optimal (DUO) and Dynamic System Optimal (DSO). In 1956, Wardrop proposed two criteria. The first...

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Problems solved by technology

[0007] 2) Limitation of user's knowledge of road conditions: users cannot have an overall grasp of road condition knowledge, mainly because of knowledge limitations on the way of driving, and at the same time, users have individualized historical experience, thus forming a deviation in understanding of road condition knowledge;

Existing traffic guidance systems and technologies generally only provide route planning functions to meet users' specific travel purposes

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