| 摘要 |
The alarm system comprises one or more detectors (1,2) arranged in a vehicle lane (10) to detect the presence of a vehicle and determine its driving direction and a control unit (5) linked to the detector. The control unit activated a warning alarm (7) when a vehicle driving in the wrong direction is detected. Additional security devices can be provided in the form of rollers that can be switched between rotating and non-rotating states and a braking lane.
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