OFweek Industrial Control Network News: In my country, the traffic management departments of public security organs, as the main bodies responsible for traffic safety management and law enforcement, undertake tasks such as traffic command, road management, vehicle, driver and pedestrian management, maintaining traffic order, ensuring traffic safety and smooth flow, and maintaining social security. Video surveillance systems can help traffic police departments dynamically monitor and accurately record road vehicle and personnel information, improve road safety management, enhance the ability to combat illegal and criminal activities, and provide scientific and effective evidence for quickly solving cases. Intelligent transportation integrates technologies from multiple fields of the security industry. Since intelligent transportation is a vertically integrated application area of the security industry, and the development trend of video surveillance in China is networking, high definition, intelligence, and integration, these three trends will be reflected in the field of intelligent transportation.
Practical significance of intelligent traffic monitoring subsystem
Traffic video surveillance systems serve as a window into the city's traffic and security conditions, and are an indispensable subsystem of the public security traffic command system. Video surveillance systems are a crucial component of intelligent transportation systems. The purpose of establishing video image monitoring systems is to promptly and accurately grasp the flow of vehicles and pedestrians, traffic and security conditions around monitored intersections and road sections, providing command personnel with rapid and intuitive information to accurately assess and respond to traffic accidents and congestion. They also record and collect evidence of sudden security incidents within the monitored area, serving both internal and external security work, and achieving comprehensive governance effects. Currently, the most widespread applications in the transportation industry are monitoring urban traffic intersections, key areas, and highway toll stations. Its practical significance is reflected in:
Traffic monitoring and management: The system transmits live images of the monitored area back to the command center, allowing managers to directly monitor traffic conditions such as vehicle queues, congestion, and traffic lights. They can then adjust signal timings or use other means to manage traffic and change the distribution of traffic flow, thereby alleviating traffic congestion.
Traffic security: Management personnel can monitor traffic security video footage at any time, track traffic conditions during large gatherings, and promptly deploy police forces to ensure smooth traffic security video recording.
By recording emergency events, we can improve our ability to handle them.
By recording violations, the surveillance system can play a positive role in terms of both economic and social benefits.
By digitally upgrading the previous analog matrix monitoring system, it can be easily managed across the entire network.
Based on the current needs of traffic monitoring, controllable or fixed cameras are typically installed at key locations such as traffic intersections, stations, commercial areas, and highway toll booths. Intelligent traffic monitoring systems can easily achieve full-network video surveillance via a network platform.
The role of intelligent traffic management platform
As can be seen from the above, a city's intelligent transportation system requires a management platform. Generally, this management platform consists of three parts: video surveillance, electronic maps and command and dispatch systems, and communication systems. Therefore, this city's intelligent transportation management and command platform needs to reflect the functional applications of these three components. Thus, our intelligent transportation management platform, designed by Patro Digital, is based at the Public Security Traffic Management Bureau Center, relying on "information channels," "terminal products," "digital maps and data warehouses, report management and generation tools," and "key technologies such as artificial intelligence, expert systems, and geographic analysis" as its technical support and operational elements. It also includes the construction of a "digital transportation website" and a "logistics information platform." This platform provides various functional government departments responsible for urban road transportation management, taxi companies, bus companies, passenger and hazardous goods transport companies, other transport companies, companies engaged in first-party logistics, second-party logistics, and third-party logistics, and citizens planning long-distance travel within the city with professional and personalized applications and services, including decision analysis, report statistics, and information retrieval.
This platform is guided by the principle of building a digital traffic management system that is "centralized across the entire network, hierarchically monitored, with clearly defined responsibilities, and effective measures." Taking the implementation of urban ITS as an opportunity, and combining the operational characteristics of taxis, passenger transport, logistics, and public transport vehicles, it researches and develops the application of 3G (GPS, GPRS, GIS) and computer information processing technologies in public transport management. This aims to reform the current operation and dispatch management methods, implement intelligent dispatching and paperless management, and conduct real-time monitoring of the operation status of relevant vehicles and routes, as well as operational performance and passenger service quality. It can also simultaneously transmit relevant service information to passengers through in-vehicle displays or intelligent electronic bus stop signs, guiding passenger flow and traffic diversion, thereby effectively improving the operational efficiency and effectiveness of transportation companies and significantly enhancing the management level of transportation departments and the level of urban traffic intelligence. Simultaneously, the system should be able to gradually connect and share information with other advanced information systems such as urban road traffic signal management systems and road network real-time monitoring systems, ultimately achieving the goals of information-based and intelligent urban public transport for transportation companies and the construction of a regional logistics information sharing platform. Specifically, the platform's functions are as follows:
Video vehicle monitoring
Traffic flow measurement and accident detection using video cameras fall under the category of vehicle monitoring. Video monitoring systems (such as automatic license plate recognition) have significant advantages over other sensing technologies; they do not require any equipment deployed on the road surface or roadbed, hence the term "non-embedded" traffic monitoring. When a vehicle passes, the video captured by a black-and-white or color camera is input into a processor for analysis to identify changes in video image characteristics. Cameras are typically fixed to buildings or pillars near the lanes. Most video monitoring systems require some initial configuration to "teach" the processor a basic background image of the current road environment. This process usually involves inputting known measurement data, such as lane spacing and camera height above the road surface. Depending on the product model, a single video monitoring processor can process video data from 1 to 8 cameras simultaneously. Typical outputs of a video monitoring system include vehicle speed, number of vehicles, and lane occupancy for each lane. Some systems also provide additional outputs such as stopped vehicle detection and false vehicle alerts.
Global Positioning System (GPS)
The embedded receiver in the vehicle can receive signals from multiple different satellites and calculate the vehicle's current location, with a positioning error typically a few meters. GPS signal reception requires the vehicle to have a line of sight to the satellites; therefore, in urban centers, the technology's use may be limited due to building obstructions. GPS is the core technology of many in-vehicle navigation systems. Many countries have already implemented or plan to implement in-vehicle satellite GPS devices to record vehicle mileage and charge accordingly.
Intelligent video analytics technology
Intelligent video analytics technology originates from research in computer vision and artificial intelligence. Applied to intelligent transportation, this research leverages the powerful data processing capabilities of computers to filter out useless or interfering information from images, automatically analyzes and extracts key, useful information from video sources. This transforms traditional surveillance cameras into not only the "eyes" of a human but also the "intelligent video analytics" computer into the "brain," possessing a more "intelligent" learning and thinking style. The most widely used intelligent video analytics technologies in intelligent transportation include: license plate recognition, traffic flow detection, vehicle wrong-way detection, abandoned objects, license plate data management, blacklist comparison, traffic incident management, traffic flow data management, and violation data management. In the field of intelligent transportation, these two technologies complement each other. High-definition video technology provides high-definition, zero-latency, high-quality traffic information video sources containing rich and complete information, while intelligent analytics technology, through intelligent information mining, offers diverse applications for traffic management departments. Without high-quality video sources, video intelligent analysis will suffer a significant reduction in accuracy due to video resolution issues and a substantial decrease in information content due to scene limitations. Conversely, without video intelligent analysis, the application of high-definition video in the transportation industry will remain at the rudimentary stage of "watching" rather than reaching the advanced stage of "using."
Multimedia scheduling
The analysis of the current state of intelligent transportation shows that information technology construction is a key focus of intelligent transportation development. Therefore, accelerating the establishment of an intelligent transportation system that integrates advanced multimedia communication, multimedia command and dispatch, and comprehensive information processing technologies, and establishing real-time, accurate, and efficient integrated transportation and management control, is one of the effective ways to significantly improve the efficiency of intelligent transportation and the level of highway traffic services.
The construction of this intelligent transportation system integrating video communication enables more convenient, direct, and clear control of highway transportation management systems based on the integration of video, voice, and data. It also allows for various forms of integrated video communication applications, greatly facilitating command and dispatch within both the intelligent transportation system and the highway system. From a technological trend perspective, the construction requires three main components: the ability to connect multiple parties for video conferencing, conduct emergency video conferences, establish video surveillance and video linkage for real-time on-site monitoring, and support 3G network video transmission to enhance emergency response capabilities.
Conclusion
The Patrol Digital Design's Urban Intelligent Transportation Integrated Management Platform aims to establish a vehicle positioning and monitoring service and business management system based on GIS platform and GPS positioning technology, covering Chongqing and its surrounding areas, and even the whole country. This system will monitor the location and status of various road moving targets, including city-owned vehicles and other social vehicles, in real time. It will also accurately locate, quickly respond to, and promptly handle emergencies, providing a comprehensive information service platform for automobile dealerships and operators at all levels. This will promote the standardization of vehicle management, thereby improving the operational efficiency of the transportation industry and the level of urban traffic intelligence, ultimately contributing to the construction of a harmonious society and the realization of a moderately prosperous society.
