Why does the car alarm sound when passing through ETC?

1 Answers
McElisa
07/29/25 8:12pm
Entering the ETC toll station and hearing the alarm sound may be due to excessive speed. Here are the detailed reasons for the alarm sounding when entering the ETC toll station: 1. Excessive speed: Generally, when passing through the ETC lane, the speed should be controlled within 20km/h to ensure the system can correctly sense and read the tag online, allowing the barrier to lift normally. If the speed is too fast, it may affect the recognition of vehicle information, leading to failure in identification and triggering the alarm. 2. Wrong entry: Additionally, the ETC lane is a dedicated lane. If a vehicle without ETC mistakenly enters the ETC lane, the alarm may sound. Moreover, the ETC lane follows the rule of one barrier, one pass, one vehicle. If this rule is not followed, and a vehicle forces its way through before the barrier resets after the preceding vehicle passes, the alarm will also be triggered. For ETC users, it must be one vehicle, one card, one device. Multiple vehicles cannot share one card or one electronic tag device. If the OBU does not match the card, passage will also be denied. 3. Precautions: When passing through the ETC lane, note that the ETC lane has height restrictions for vehicles and speed limit signs to control vehicle speed. It is necessary to slow down and pass carefully. If the driving speed exceeds 100% of the speed limit, it is likely that 12 points will be deducted from the driver's license according to the highway speeding regulations.
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