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How to achieve effective monitoring of people, roads and vehicles under the existing road conditions and maximize the efficiency of road utilization has become a top priority to effectively solve the current traffic congestion problem. I think that the effective application of Internet of Things technology to traffic signs will greatly promote the development of intelligent transportation systems.
Problems in the setting of traffic signs
1. The setting of road traffic signs and markings cannot fully reflect their functions. Just like the current method of selecting information for road signs, it cannot meet the needs of the networked road traffic system. How to provide high-quality guidance and guidance information for road network users under the condition of road network formation to meet various requirements? Purpose The driver’s needs, to maximize the effectiveness of the road network, and to fully realize the road network system’s role in traffic diversion is a new problem faced by traffic.
2. There is a lot of randomness and blindness in the setting of signs and markings. In reality, the setting of signs and markings fails to consider the problem of marking and marking settings from the perspective of traffic flow. Some dogmatically apply the old ideas and standards in the past to set up, which has caused many technical defects.
Characteristics of the Internet of Things
The concept of the Internet of Things is a network concept that extends and expands its user side to between things and carries out information exchange and communication on the basis of the Internet concept. The core and foundation of “Internet of Things technology” is still “Internet technology”, which is a kind of network technology that is extended and expanded on the basis of Internet technology; its user end extends and extends to any item and between items for information exchange and communication.
The Internet of Things should have three characteristics:
The first is comprehensive perception, that is, the use of RFID, sensors, QR codes, etc. to obtain object information anytime and anywhere;
The second is reliable transmission. Through the integration of various telecommunication networks and the Internet, the information of objects can be transmitted accurately in real time;
The third is intelligent processing, which uses various intelligent computing technologies such as cloud computing and fuzzy recognition to analyze and process massive amounts of data and information, and implement intelligent control of objects.
The efficacy of Internet of Things technology applied to traffic signs
1. Realize the adjustment of the external environment
Establish an Internet of Things system, use RFID technology for individual identification of traffic signs, design special RFID tags for it, and build an RFID management information system combined with wireless sensor networks, PC databases, car terminals, etc., to achieve effective traffic identification data Traceability and data sharing, so as to achieve the purpose of optimizing the management and maintenance of traffic signs. The application of Internet of Things technology to traffic signs can obtain weather information, such as humidity, rain and fog, and sunlight intensity, so as to perform scientific analysis, automatically trigger related behaviors, adjust the reflection angle of signs, and issue warning signals based on corresponding weather information. In the past, the design, installation and management of traffic signs were very confusing due to objective reasons, and there were many problems. For example, if five or six signs were installed on a sign pole, the driver could not read it in a short time. The Internet of Things technology effectively solves such problems. It automatically triggers the most reasonable prohibitions, instructions or warning signs for car owners by monitoring the actual weather, traffic flow and other conditions.
2. Realize flow control and traffic guidance
Regarding the inconvenience caused by information lag, most current traffic congestion is not caused by the lack of traffic or more cars, but the poor transmission of information on the road conditions. On the other hand, even in some places, the information transmission is smooth. Information processing is not timely and lack of corresponding intelligent applications is also an important reason. Traffic signs play an important role in the capacity of roads. The application of Internet of Things technology to traffic signs can intelligently realize flow control.
The data exchange between traffic signs and automobile terminals is real-time and two-way. Through various traffic signs, real-time monitoring and collection of road traffic flow information, and storage of related flow attributes and data information to obtain a traffic flow database. The scope of the traffic flow monitored is mainly Including: the total traffic flow of each entrance and exit of the road section, the traffic flow of different entrances to different exits, the traffic flow of each junction entrance and exit per unit time, and the traffic flow of unit interval time. By collecting the monitored traffic data flow, data format conversion and database storage, the traffic flow database of the intelligent transportation system can be established. Through this database, the traffic can be controlled automatically or manually through traffic signs. For example, when the road is not smooth, the traffic signal light can obtain real-time information through the sensor, and adjust the signal light reasonably by itself, and the corresponding sign can appropriately divert this section of the road, so as to achieve the purpose of alleviating the road pressure.
The application of Internet of Things technology to traffic signs can also enable relatively independent and fixed individuals to form an organic whole, forming an effective road network. Through the traffic sign system, the traffic conditions of the downstream roads are indicated to the travelers, and the travelers can choose the appropriate driving roads, which not only provides the travelers with the travel guidance service, but also adjusts the distribution of the traffic flow and improves the traffic conditions. The intelligent traffic guidance function also needs to be able to receive the query function from the vehicle terminal, locate the vehicle based on RFID, GPS, etc., according to the location of the vehicle in the network and the destination entered by the traveler, combined with the road network transmitted by the traffic data collection subsystem Traffic information provides travelers with driving routes that can avoid traffic congestion, reduce delays, and reach their destinations efficiently. A map of the road network conditions in front of the vehicle is given on the vehicle terminal, and the recommended best driving route is indicated with arrows.
Three, easy to maintain and manage
At present, it is difficult to maintain the traffic sign management, especially the phenomenon of the rural road signs being scratched by vehicles, hitting a bend, marking aging, falling off, or poor reflective effect is more common. The corresponding traffic signs can be accurately located through RFID tags, and can be set through programs. When the traffic signs are damaged, the maintenance request can be sent to facilitate the management of the highway management department, and all maintenance information can be archived for future adjustments. Take analysis.
As an emerging industry, the Internet of Things technology has been officially listed as one of the country’s five emerging strategic industries and included in the Twelfth Five-Year Plan. The Internet of Things has received great attention from the whole society in China, and its level of attention in China is unmatched in the United States, the European Union and other countries. The Internet of Things is the use of various information sensing devices to connect objects to each other to realize the intelligent identification, information exchange and management of any object at any time, any place, and any place. It is used in traffic signs and has many advantages:
(1) Real-time, accurate and comprehensive data collection;
(2) Flow control and traffic guidance;
(3) Path identification and historical path backtracking;
(4) Facilitate the maintenance of signs and markings. The Internet of Things technology is an opportunity for the application of transportation systems, and the development of the Internet of Things technology will also have a profound impact on the future of modern transportation.
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