There must be a car family who knows ETC. ETC is the electronic toll collection system. At present, many expressway toll gates have opened ETC toll collection channels. ETC mainly includes infrared scanning identification technology, CCD camera identification technology, laser scanning identification technology, IC card identification technology, microwave non-contact ID card identification technology. Although ETC achieves non-stop charging, it still needs to slow down and must pass through the toll gate at a smaller speed. And RFID technology can scan high-speed moving objects with high precision, and the speed of data reading is very fast, so the car with RFID electronic license plate can pass through the toll gate at high speed. In addition, ETC is active and needs batteries, while RFID electronic license plates can be passive without batteries.