When did ETC start?

20 14 12 2 1 according to the arrangement of the Ministry of transport, the national networking systems of ETC in Beijing, Tianjin, Hebei, Shandong, Shanxi, Shanghai, Jiangsu, Zhejiang, Anhui, Fujian, Jiangxi, Liaoning, Shaanxi, Hunan 14 provinces and cities have completed the handover test and officially. The working principle of ETC: it communicates with the microwave antenna in ETC lane of toll station through the vehicle electronic tag installed on the windshield of the vehicle, and makes settlement with the bank in the background by using computer networking technology, so that when the vehicle passes through the toll station of expressway or bridge, it can pay the toll of expressway or bridge without stopping. Places where ETC can be installed: OBU equipment for small vehicles such as cars and vans is installed in the middle and upper part of the front windshield, and large vehicles such as trucks and buses are installed in the middle and lower part. Requirements for installation position of ETC: the height is not less than 65438+2.5m, and the installation angle n is between 30 and 90 (the angle between the surface of electronic tag and the horizontal plane).