Signs with red circles are mostly prohibitive. Plates below signs qualify their message.
Entry to 20 mph zone
End of 20 mph zone
School crossing patrol
Maximum speed
National speed limit applies
Stop and give
way
Give way to traffic on major road
No vehicles except bicycles being pushed
No entry for vehicular traffic
No right turn
No left turn
No U-turns
Give priority to vehicles from opposite direction
No overtaking
No motor vehicles
Manually operated temporary STOP and GO signs
No buses (over 8 passenger seats)
No cycling
No towed caravans
No vehicles carrying
explosives
No vehicle or combination of vehicles over length shown
No vehicles over height shown
No vehicles over width shown
No vehicles over maximum gross weight shown (in tonnes)
No goods vehicles over maximum gross weight shown (in tonnes) except for loading and unloading
No waiting
No stopping (Clearway)
No stopping during times shown except for as long as necessary to set down or pick up passengers
Parking restricted to permit holders
No stopping during period indicated except for buses
Note: Although The Highway Code shows many of the signs commonly in use, a comprehensive explanation of our signing system is given in the Department's booklet Know Your Traffic Signs, which is on sale at booksellers. The booklet also illustrates and explains the vast majority of signs the road user is likely to encounter. The signs illustrated in The Highway Code are not all drawn to the same scale. In Wales, bilingual versions of some signs are used including Welsh and English versions of place names. Some older designs of signs may still be seen on the roads.
Signs with blue circles but no red border mostly give positive instruction.
Rules and regulations - Latest 2007 
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