The document discusses the application of RFID technology in electronic license plates for smart transportation. It describes how electronic license plates using RFID tags can accurately identify vehicles, not be impacted by environment, and provide vehicle and traffic data. Two scenarios are discussed: 1) Smart parking systems can automatically recognize vehicles and charge fees without stops. 2) Intelligent traffic management can efficiently monitor public transport and special vehicles. Overall, electronic license plates address issues with traditional plates and their use is expected to grow with advances in smart cities.

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Application of RFID Technology Electronic License Plate in Smart Transportation
Written By Calio Huang
As the size of the city expands and people's living standards improve, the number of vehicles on
the road becomes more and more. This not only increases traffic pressure but also imposes
higher requirements on the management of vehicles. Is there any new technology to solve these
problems? Of course, it is the smart electronic license plate.
At present, the most common localization and recognition of license plates basically relies on
image recognition. After detecting the license plate number, it is compared with the list in the
database. However, image recognition is greatly affected by environmental factors. It is easy to
identify license plates and collect images. Blindness often occurs at the same time, and these
uncontrollable factors limit the further development of image recognition.
In order to solve this series of problems, intelligent electronic license plate came into being. The
intelligent electronic license plate is based on RFID technology, and RFID technology is a new
non-contact automatic identification technology and traditional video and image processing
license plate recognition technology. In comparison, RFID-based vehicle identification has high
accuracy, is not easily affected by the environment, and has no blind spots. It can accurately and
comprehensively obtain vehicle status information and road network traffic conditions. The
future development trend will be the recognition of electronic vehicle license plates gradually
replacing traditional license plates.
The core of electronic license plates is electronic tags based on RFID technology. The RFID
electronic tags are divided into two types: active and passive. Considering the service life and use
scenarios of electronic license plates, passive electronic tags have a long life and small size. The
installation and low cost are more suitable for vehicle installation. In the choice of
communication distance, UHF 860MHz ~ 960MHz passive RFID electronic tag has the advantages
of long communication distance, fast transmission speed, and its use as an electronic license

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plate recognition is a very good choice.
Since the prospect of electronic license plate recognition is so vast, it certainly has many
advantages and characteristics that are incomparable with traditional image recognition
technologies. Where are the specific basic requirements and technological advantages reflected?
We simply list the following:
The basic requirements for electronic license plates:
Can store data (vehicle model, color, owner information);
Long-distance reading identification tag, fixed reading device distance of more than 10 meters;
High reliability, reading success rate of up to 99.99%;
A large number of tags can be identified at the same time, with a maximum of more than 200 per
second;
Accurately identify tags in high-speed motion, and the speed of mobile recognition can reach
more than 100km/h.
Electronic license plate technology advantages:
Data encryption, the use of unique algorithms in the tag communication process, third-party
devices cannot read;
Easy to install, without any special installation tools or materials;
The unique person card and garage group matching algorithm can accurately determine the
illegally used motor vehicles;
All weather, you can work reliably in any weather conditions.
It is precisely because of the many advantages and characteristics of electronic license plates
compared to traditional license plates. It is foreseeable that in the near future, motor vehicles
will gradually use electronic license plates with electronic tags to replace the current traditional
license plates, and thus, from the front of vehicles. The construction and development prospects
of the electronic license plate, the license plate recognition, data transmission, vehicle
management, data storage, and terminal inquiry, etc. to the rear end are all very broad.
Electronic license plate application scenario
Scenario 1: Smart parking system
Speaking of most of the current parking management, it may be that many “old drivers” have
encountered more or fewer problems such as difficult parking, high fees, and no parking spaces.
In order to solve these parking problems, in recent years, the national policy has clearly put
forward the application of high technology such as the smart parking system and the automatic
recognition of license plates. In simple terms, the "wisdom" of smart parking is reflected in
intelligent space search + automatic parking fees.
So, how do we actually achieve smart parking? Let’s take the most common parking lot. The most
important technologies are license plate recognition technology and ETC technology. Before the
vehicle with the electronic license plate enters the parking lot, the intelligent parking system can
accurately identify the vehicle's identity over a long distance through the electronic license plate
recognition device, record the time of entry and exit of the vehicle to accurately charge, enable
the vehicle to pass quickly, and do not need to stop for manual recording. When the vehicle is
parked and exits the parking lot, the smart parking system will use the license plate to identify
the antenna and the electronic license plate for short-range communication. The driver will

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automatically complete the entire charging process without any need for the driver to stop or
take any action.
Through the application of smart parking system can improve the efficiency, prevent the
occurrence of "bottleneck" in the traffic at the toll station, and at the same time realize the
charges for uninterrupted intervention through RFID technology, effectively restraining the
behaviors of evading the parking fees, charging staff dereliction of duty, favoritism and
malpractice. At the same time, it will reduce the administrative costs of toll stations and recoup
infrastructure investment more quickly.
Scenario 2: Intelligent Traffic Management System
RFID technology can be used as an effective means of information collection in traffic dispatching
systems and can be applied in traffic dispatch management systems. For example, applying RFID
to a bus yard management system can realize the automatic, accurate, long-distance, and no-stop
collection of information when buses with electronic license plates are in and out of a station,
enabling the bus dispatching system to accurately grasp the real-time dynamics of bus access to
public parking lots. information. Through the implementation of the system, the management
level of buses can be effectively improved. Computers can be used to conduct research and
analysis on the collected data. The rules of use of vehicles can be grasped, loopholes in vehicle
management can be eliminated, intelligent management of public transport vehicles can be
achieved, and the image of the city can be enhanced.
In addition, the use of RFID as a technical means is highly economical and has the advantages of
convenient installation, strong adaptability, low cost, and no need for vehicle modification as
compared with other technologies such as Global Positioning System (GPS). At the same time,
special dispatching and management can also be carried out for some special service vehicles
such as garbage transport vehicles and dangerous goods transport vehicles. Through the
electronic license plate installed on the vehicle, an identification device is placed at the
monitoring point of a specific road section to monitor whether the vehicle is traveling in
accordance with a prescribed route, and the position of the accident vehicle can be timely
located when a sudden situation such as a leak occurs.
In the future, with the advancement of science and technology, from smart wear to smart travel,
smart cities in the future will be closer and closer to us. People's travel will also become more
convenient.