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原文
Study on Path Optimization Method of Traffic Guidance System under the Condition of the Car Networking
Victor Gradinescu, Cristian Gorgorin, Raluca Diaconescu, Valentin Cristea
Abstract.
Intelligent Transportation System is the primary means of solving the city traffic problem. The information technology, the communication, the electronic control technology and the system integration technology and so on applies effectively in the transportation system by researching rationale model, thus establishes real-time, accurate, the highly effective traffic management system plays the role in the wide range. Traffic flow guidance system is one of cores of Intelligent Transportation Systems. It is based on modern technologies, such as computer, communication network, and so on. Supplying the most superior travel way and the real-time transportation information according to the beginning and ending point of the journey. The journey can promptly understand in the transportation status of road network according to the guidance system, then choosing the best route to reach destination.
Introduction
City traffic with the contradiction is between economic and social development of their increasingly prominent. Traffic congestion, traffic accidents, traffic pollution and energy consumption are urgent problems to be solved at present. People have been aware of the traditional multi-road has not fundamentally curb worsening traffic. Since the beginning of the last century the implementation of intelligent traffic system is as the main means of solving the contradiction of intestine and the future directions of research and development, through high-tech means to change the backward traffic control. Traffic management is so as to maximize the efficiency of transportation [1]. The focus is on the induced traffic subsystem in intelligent transportation system.
City traffic flow referred to as the guidance system is using the global positioning system. Electronic traffic map that is computers and advanced communication technology, display the current position of the vehicle. The road traffic network and road traffic situation in the on-board computer is driver specified the optimal route to destination and guides the driver#39;s driving [2]. Guidance system can effectively reduce the residence time of vehicles on the link prevent the occurrence of traffic jams. The optimal allocation is finally achieved in road traffic flow. The traffic information release subsystem generates various diversification plans through various information layouts, and finally releases the induction information to the induction screen, so that the traveler can reasonably select the travel route, alleviate the traffic congestion, and effectively control the reasonable operation of the traffic flow. Road traffic system security and smooth.
Transportation is the lifeline of the city function. It has a direct impact on all aspects of social economy, the production and life. With the rapid development of social progress and economic, city traffic increases rapidly [3]. Traffic congestion has become one of the urgent problems of modern society. In the automobile industry development, the density of road network is period traffic congestion problem by road and bridge construction. Road widening and other measures to alleviate the contradiction have achieved good results in a certain period of time [4]. But in the century, with the development of economy the traffic situation is deteriorating, traffic congestion, traffic accidents and environmental pollution. Energy shortage has become a common problem facing the world.
The Key Technology of City Traffic Flow Guidance System
Four key steps of traffic flow guidance system is the information acquisition and processing. Traffic information service system is vehicle location and path optimization of traffic flow [5]. City road network is seen as Fig. 1. To form a unified whole through information technology communication technology, electronic technology, computer technology and other support traffic guidance system.
Fig. 1. City road network
Acquisition of traffic guidance information is the base of route guidance, including road condition information, weather information and traffic information. The traffic information and traffic flow have road occupancy rate, travel time and the crowded degree. City traffic network topology modeling is seen as Fig. 2. Information status and weather road according to the relevant departments of the information data are available. The traffic information needs to be collected in transportation system.
Fig. 2. City traffic network topology modeling
Traffic information service is the purpose of the traffic information safe and accurate release out, including the pre trip travel information related to destination information, real-time dynamic traffic information, route guidance information and public information. The working process for the dynamic traffic information collected and other traffic information data processed and sent to the data bus. The system is responsible for information retrieving data from the information platform based on the user#39;s needs as well as the content to be transmitted and then sent to the user.
Vehicle positioning system is mainly through the positioning to determine the exact position in the road network in vehicle. The main research contents through the difference theory and technology, correct the error, improve the positioning accuracy of fault self diagnosis to establish communication network, vehicle position calibration.
Path optimization is based on the position in the road network of t
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