Surveillance method for zone of risk on railway level crossing uses laser scanner to monitor zone after barrier has been lowered, signal being sent to brake approaching locomotive if risk is detected
摘要
<p>The surveillance method for a zone of risk (16) on a railway level crossing (11) uses a laser scanner (22) to monitor the zone after the barrier has been lowered. If a risk is detected a signal is sent to brake an approaching locomotive.</p>
