Abbreviated term for Patrolman’s Lockout DeviceA type of Lockout System that allows a Patrolman, with the permission of the Signaller, to prevent the signalled movement of traffic, for example, in one direct....
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Abbreviated term for Patrolman’s Lockout DeviceA type of Lockout System that allows a Patrolman, with the permission of the Signaller, to prevent the signalled movement of traffic, for example, in one direct....