Highway Video Surveillance System Research And Design

The consummate surveillance system of expressway with advanced and modern high tech traffic management system, and intellectualizing the road, can achieve the goals of moderating road jam situation, reducing traffic accidents, saving energy etc, thereby reflect the service spirit of "vehicles oriented and human oriented". The research shows that it can increase 2~3 times of road traffic capacity, minimize 30% of parking times, reduce 13%-45% of running time, and cut traffic accidents in doubles. That is why many important expressway sections in the nation conduct whole line video surveillance at present so as to achieve non-blind surveillance basically. Through the conducting of system, operators can monitor operating condition of the sections by video mode in real time and collectiveness, improve the automation level of expressway management, and guaranty safe and normal operation of facilities.This paper introduces the constitution, functions, used key technologies and current development situation of expressway video surveillance system at present. Studies various solutions of remote transmission for video pictures and voice, analyses the working principle and key technologies of traffic events detecting system with functions of self identifying, warning and video record. Analyses how to transmit site video and voice to remote company headquarter, thereby company headquarter operator not only can view and control remote site video surveillance equipment, but also can call expressway sub-company with internal telephone and free of long distance phone call toll. Provides the methods of power supply and lightning protection etc. Finally, this paper indicates that the trend of real time, network, intellectualizing and digitizing will become the main development direction of expressway video surveillance system.