Why is there no fee deduction displayed after passing through the highway with ETC?

[Gimli]

The reason why there is no fee deduction displayed after passing through the highway with ETC is: the deduction is not in real-time, and most of the time it is delayed for a few days before being processed. ETC works through dedicated short-range communication between the onboard electronic tag installed on the vehicle's windshield and the microwave antenna in the ETC lane at the toll station. It uses computer networking technology to perform backend settlement processing with the bank, achieving the purpose of vehicles passing through highway or bridge toll stations without stopping to pay the fees. The reasons why ETC may not be detected include: 1. The electronic tag is not inserted correctly; 2. Unauthorized removal of the onboard electronic tag will render it unusable; 3. The vehicle's windshield has a metal explosion-proof film; 4. OBU transfer or replacement requires visiting a service center.