Traffic condition analyzing device and method based on vector mode

Abstract

The invention discloses a traffic condition analyzing device based on a vector mode. A road section between two adjacent intersections is taken as a unit road section. A collecting module, a normalized module and a comparison module are arranged. The collecting module is used for acquiring five traffic condition parameters of the unit road section at current time bucket; the normalized module is used for performing short-time prediction and normalization on the traffic condition parameters respectively and constituting a five-dimensional feature vector; and the comparison module is used for comparing the five-dimensional feature vector with various preset reference value respectively and the basic traffic condition corresponding to the reference value with the biggest similarity is determined as the current traffic condition of the unit road section. The device and the method have a simple model mode and low computation complexity. Meantime, the possible traffic change trend is the key consideration, thus the traffic condition analysis can have actual and practical effects. The device and the method have the advantages of low installation and maintenance cost, high working efficiency, high precision, strong adaptability and the like. The invention also discloses a traffic condition analyzing method based on a vector mode.

Description

technical field [0001] The invention relates to a traffic management device and method, in particular to a vector mode-based traffic state analysis device and method. Background technique [0002] In traffic management, traffic signal coordination control and vehicle guidance are two important components of urban road traffic control system, and the traffic status analysis device and the analysis method using the analysis device provide current traffic information for these two control parts is a key component. [0003] At present, there is no uniform definition and standard of urban road traffic status in the world. However, the three-phase flow theory that divides traffic flow into free flow, synchronous flow and blocked flow is widely used, among which free flow, synchronous flow and blocked flow Congestion flow corresponds to the three states of smooth, normal and congested traffic conditions (or low traffic, medium traffic and heavy traffic) on the mesoscopic level. M...

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Problems solved by technology

Theoretically, these methods will have better results when applied to a mature and complete road traffic system. However, for most cities that are still in development, these methods use more control facilities and excessive capital investment. large, and the computational complexity of the model is high, which puts huge pressure on local finances. Therefore, traditional traffic state analysis devices are not suitable for most small and medium-sized cities.

[0005] In addition, since the source traffic information used by these methods is only the traffic information at the current moment, and cannot reflect the changing trend of road traffic flow, the traffic status results produced by them have a certain lag, which cannot fully satisfy traffic management and the public. Demand for road traffic status when traveling

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