Analysis of Nanjing Intelligent Transportation Guidance Service System Engineering Case
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In recent years, although domestic cities have continuously added or expanded roads, built a large number of traffic facilities, and strengthened traffic management, the traffic pollution, traffic congestion and traffic accidents in the city are still relatively serious.
The traffic monitoring center that has invested a lot of money in the construction, due to the special conditions of traffic management in various places, the monitoring center can not really play its actual effect, and the effect is not significant. However, the current traffic monitoring system in domestic cities generally stays under the control of the timing signal lights at a single intersection, and cannot perform real-time control based on the real-time changes of the urban network traffic flow. In addition, the existing traffic information release method is single, the release content is monotonous, and the scope of influence is small, and the release of traffic information cannot be delivered to the audience on time, accurately and efficiently.
How to effectively solve the problems faced by urban traffic? In addition to strengthening infrastructure construction, learning from the traffic management experience of foreign developed countries, integrating the actual conditions of domestic cities, and attaching importance to the development and application of intelligent transportation systems (ITS), can the traffic be reduced more quickly. The impact of factors on the environment.
Under the leadership and support of the Traffic Management Bureau of Nanjing Public Security Bureau, Nanjing Intercity Online Information Technology Co., Ltd. joined hands with the research team of Professor Yang Xiaoguang from the Intelligent Transportation System (ITS) Research Center of Tongji University to develop the Nanjing main project of the Jiangsu Intelligent Transportation Guidance Service System , According to the actual traffic conditions in Nanjing, the Nanjing Intelligent Traffic Guidance Service System is developed and applied. By using existing traffic management measures, integrating and sharing traffic information resources, and giving play to the traffic efficiency of existing roads, we will continuously improve traffic mobility, safety and road traffic capacity, and improve and improve public travel efficiency and service levels as the starting point and The ultimate goal is to establish China’s first intelligent transportation demonstration system that can be truly applied to government and social public services and can be operated commercially.
The system can provide traffic travelers with all-round real-time dynamic traffic information through the Internet, traffic guidance screens, routing systems, mobile communications, in-vehicle navigation terminals (“inter-city navigation”), radio and television stations and other multi-source publishing methods and equipment!
Information content of different traffic guidance service terminals
(1) System information release method
Car navigation terminals, broadcasting, mobile phones and PDAs, guidance service stations, mobile 12580 audio and short message platform, telecom 114, 118114 audio and short message platform, Internet website, roadside VMS, etc.
1. Car navigation terminal
The car navigation terminal can receive various types of information sent by the sub-system software of the intelligent traffic information service center, and allow travelers to make adjustments to the current state based on the information provided.
2. Information release of traffic managers
After the traffic manager (traffic police) receives the data processed by the intelligent traffic information service center, it will be applied to traffic guidance screens, traffic broadcasts, traffic signal control, traffic monitoring, traffic management, etc., to effectively regulate traffic flow and efficiently manage traffic conditions , Alleviate urban traffic congestion.
(2) Traffic data used by the system
FCD, traffic signal control traffic detection information, parking space information, traffic control information, highway network related information, traffic weather information, LBS website information, etc.
(3) The data transmission method of the system
GPRS, FM, CDMA, etc.
(4) System achievements
Nanjing Intercity Online Information Technology Co., Ltd. and the team of Yang Xiaoguang from the Intelligent Transportation System (ITS) Research Center of Tongji University have carried out extensive and in-depth scientific research and practice in the field of intelligent transportation through close cooperation. With the strong support of government departments, the integration of various advantageous resources, and the full use of Tongji University’s talent and technological advantages, has developed a series of software and technology for effective traffic management and information service applications with completely independent intellectual property rights to achieve intelligence throughout the province of Jiangsu The construction of traffic management has established a solid theoretical and practical foundation.
1. FCD data analysis and processing software. The software can analyze and process floating car data in real time and display the current real-time road conditions. Red represents congestion, yellow represents congestion, and green represents unblocked traffic. However, due to the influence of the FCD’s own operating rules and characteristics, the accuracy of traffic status judgment is about 70%.
2. Multi-source traffic information management software
Sub-software 1: Real-time traffic management system
Sub-software 2: Video surveillance management system
Sub-software 3: Traffic control information management system
3. Software for automatic identification of traffic status
The automatic traffic state identification system developed based on the data of coil radar and traffic police signal light control system will greatly improve the accuracy of traffic state identification.
4. The traffic information service platform software provides traffic information and other service management software according to different publishing methods, such as networked routing service system, parking lot query system, 12580, 114, etc. voice, short message service platform, traffic radio station, TV Wait.
To provide different audiences with the safety, convenience and speed brought by the intelligent traffic guidance service system.
Examples of service methods:
1) Mobile communication method
2) Internet (internet) method
You can access the intercity online intelligent traffic information service center through the Internet, and you can print the driving route map at home in advance before you travel, and query parking lot information, traffic control information, etc.
As of November 2008, fixed-point guidance service stations have been established in Nanjing Shanghai-Nanjing Expressway, Second Bridge, Third Bridge, and Airport Expressway to provide road book printing services for passing vehicles, and in Nanjing 500hu overpass, Tiexin Bridge overpass, and long-distance bus Notice boards for the construction of directions service in North Railway Station, Dingshan, Dongyangfang Interchange, Liutang Interchange, Shuanglong Street Interchange, Wanjialou Interchange, Youfangqiao Fenghuang South Road, Yongzhuang Interchange and other places, informing users of China Mobile 12580 and China Telecom 114 , 118114 and other guide service hotlines.
Since the service was opened, the Nanjing Traffic and Patrol Police Intercity Navigation Guide Service System has printed a total of 210,390 road guides, an average of 410 road books printed every day, and more than 20,000 phone calls and SMS services.
1. Path guidance path planning is divided into three types;
The shortest time: The total length of the road section planned after avoiding the traffic jam is the shortest.
Shortest distance: the shortest driving distance between the start point and the end point. The shortest path: The planned road has the highest level and is the easiest to distinguish.Select “shortest path”: the displayed path of travel
Select “shortest time”: displayed driving route
The guide book shows the driving route of the query
(6) Significance of system construction
The construction of Nanjing’s intelligent traffic guidance service system is based on Nanjing, with the goal of improving and improving public travel efficiency and service levels, integrating and sharing Nanjing’s traffic information resources. International Online Information Technology Co., Ltd. and Tongji University ITS Research Center jointly undertake the completion.
The system provides all-round real-time dynamic and static information to traffic travelers through various devices including vehicle-mounted terminals.
After the application of the intelligent traffic guidance service system, the new measures of traffic police to serve the people will raise the means of alleviating urban traffic congestion to a new level. The social and economic benefits are outstanding. According to foreign authoritative data, it can effectively improve the benefits of transportation and make traffic Congestion is reduced by 20%, delay losses are reduced by 10-25%, car accidents are reduced by 50-80%, fuel consumption is reduced by 30%, and exhaust emissions are significantly reduced.
Through the successful construction of an intelligent traffic guidance service system in Nanjing, the continuous integration, demonstration, application, and promotion of supporting scientific research and technological achievements that can improve the service level of the government and the public, and integration of various traffic information resources, to create China’s first real application in Nanjing It is an intelligent transportation demonstration system that can be used for government and social public services and can be operated commercially.
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