Signals by Authorised Persons
Browse 15 signs in this category
Police officers
Stop
Arm signals to persons controlling traffic
Driver and Vehicle Standards Agency officers and traffic officers
Who can direct traffic
Police officers, police community support officers, traffic officers, school crossing patrols and other authorised persons can direct traffic, and by law you must obey their signals — even when they contradict traffic lights, signs or road markings. If an officer is controlling a junction, their signals take priority over everything else.
The signals cover traffic approaching from the front, from behind and from the side, along with beckoning movements that tell a particular stream of traffic to move on. School crossing patrols use their circular stop sign to halt traffic for children, and you must remain stopped until the sign is lowered.
Theory test tip
In the theory test you may be shown a photograph of an officer mid-signal and asked what it means, so study each pose carefully — particularly the difference between stopping traffic from the front and stopping traffic from behind.














