Warning signs
Mostly triangular
Distance to ‘STOP’ line ahead
Dual carriageway ends
Road narrows on right (left if symbol reversed)
Road narrows on both sides
Distance to ‘Give Way’ line ahead
Crossroads
Junction on bend ahead
T-junction with priority over vehicles from the right
Staggered junction
Traffic merging from left ahead
The priority through route is indicated by the broader line.
Double bend first to left (symbol may be reversed)
Bend to right (or left if symbol reversed)
Roundabout
Uneven road
Plate below some signs
Two-way traffic crosses one-way road
Two-way traffic straight ahead
Opening or swing bridge ahead
Low-flying aircraft or sudden aircraft noise
Falling or fallen rocks
Traffic signals not in use
Traffic signals
Slippery road
Steep hill downwards
Gradient may be shown as a ratio, i.e. 20% = 1:5
Steep hill upwards
Gradient may be shown as a ratio, i.e. 20% = 1:5
Tunnel ahead
Trams crossing ahead
Level crossing with barrier or gate ahead
Level crossing without barrier or gate ahead
Level crossing without barrier
School crossing patrol ahead (some signs have amber lights which flash when crossings are in use)
Frail (or blind or disabled if shown) pedestrians likely to cross road ahead
Pedestrians in road ahead
Zebra crossing
Overhead electric cable (plate indicates maximum height of vehicles which can pass safely)
Available width of headroom indicated
Sharp deviation of route to left (or right if chevrons reversed)
Light signals ahead at level crossing, airfield or bridge
Miniature warning lights at level crossings
Cattle
Wild animals
Wild horses or ponies
Accompanied horses or ponies
Cycle route ahead
Risk of ice
Traffic queues likely ahead
Distance over which road humps extend
Other danger (plate indicates nature of danger)
Soft verges
Side winds
Hump bridge
Worded warning sign
Quayside or river bank
Risk of grounding