Why is the ETC fee not deducted for several days after exiting the highway?

[DeCora]

There are two scenarios where the highway ETC fee is not deducted: one is due to a damaged barrier, where driving too fast through the ETC lane causes the fee deduction to fail; the other is because the ETC fee is recorded on a deferred basis, meaning it is not deducted immediately but will be charged within a certain period. Precautions for using ETC: The ETC transaction sensing range is 8 meters. When encountering a vehicle in front that has stopped, to prevent the front vehicle's ETC device from malfunctioning or not having an ETC device at all, maintain a distance of more than 10 meters to avoid automatic sensing and paying for the front vehicle. The ETC lane recognition speed is 20km/h. Driving too fast will prevent the vehicle's device information from being read, leading to a failed fee deduction. Unauthorized removal or movement of the OBU device, or if the ETC electronic tag falls off or becomes loose, will cause the electronic tag to fail. It can be taken to the bank where the ETC card was issued or the highway service office for inspection. If the loosening or falling off is not due to human factors, it only needs to be reactivated. When using a debit card bound to ETC, insufficient balance will also cause the fee deduction to fail. Follow the guidance of on-site staff to use the manual MTC lane, paying with cash or card. Poor sensing due to overly thick car windshield glass. This is especially important for vehicles that have had their windshields replaced after an accident or those with modified front windshields.