What is the reason for the ETC not being scanned when exiting the highway?

[LaCorbin]

There are two possible situations when the ETC is not scanned when exiting the highway, related to the ETC scanning point at the exit: 1. Entry scanned but exit not scanned: If the ETC is scanned at the highway entry but not at the exit, the next entry point for the vehicle will be the previous exit point. If within the free time period, no charge will be applied; if within the charging time period, the fee will be calculated based on the distance from the ETC entry point to the highway entry point. 2. Unsuccessful scanning: If the ETC card is not successfully scanned when exiting the toll station, the vehicle will not be able to use the ETC lane for highway entry next time.