Prohibitory signs
46 signs
Round with a red border: something is not allowed. These come up most often in the exam.
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B-1
no traffic in both directions
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B-2
no entry
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B-3
no motor vehicles except two-wheeled motorcycles
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B-3a
no buses
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B-4
no motorcycles
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B-5
no lorries
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B-6
no agricultural tractors
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B-7
no motor vehicles with trailers
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B-8
no animal-drawn vehicles
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B-9
no bicycles
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B-10
no mopeds
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B-11
no cycle carts
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B-12
no handcarts
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B-13
no vehicles carrying explosives or flammable goods
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B-13a
no vehicles carrying dangerous goods
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B-14
no vehicles carrying goods that may pollute water
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B-15
no vehicles wider than ... m
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B-16
no vehicles higher than ... m
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B-17
no vehicles longer than ... m
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B-18
no vehicles with an actual total mass over ... t
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B-19
no vehicles with an axle load over ... t
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B-20
stop
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B-21
no left turn
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B-22
no right turn
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B-23
no U-turns
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B-24
end of no U-turns
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B-25
no overtaking
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B-26
no overtaking by lorries
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B-27
end of no overtaking
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B-28
end of no overtaking by lorries
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B-29
no audible warning signals
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B-30
end of no audible warning signals
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B-31
priority to oncoming traffic
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B-32
stop - customs control
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B-33
speed limit
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B-34
end of speed limit
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B-35
no parking
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B-36
no stopping
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B-37
no parking on odd days
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B-38
no parking on even days
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B-39
restricted parking zone
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B-40
end of restricted parking zone
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B-41
no pedestrians
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B-42
end of all restrictions
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B-43
speed limit zone
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B-44
end of speed limit zone
How to recognise Prohibitory signs signs
- Shape
- circle (B-20: octagon)
- Colours
- white background, red border, black symbol; zone signs on a white panel
Where they start to apply and where they end
Prohibitory signs apply to the road on which they stand, generally from the sign onwards. Their extent depends on the particular sign and supplementary plates. The next junction ends restrictions including B-25, B-26, B-29, B-33 and B-35 to B-38, except on a dual carriageway where a road joins only from the left without connecting to the right-hand carriageway. Zone restrictions continue to the end of the zone. B-42 cancels B-23, B-25, B-26, B-29 and B-33, but not parking or stopping restrictions. B-35 to B-38 apply to the side of the road where they stand.
Prohibitory signs signs on the exam
The official catalogue of exam questions contains 451 questions featuring a sign from this group. They cover 34 of the 46 signs in the group, so not every sign comes up equally often.
Take a mock exam →Most frequent on the exam
- B-20 stop 183 questions
- B-33 speed limit 74 questions
- B-23 no U-turns 41 questions
- B-36 no stopping 38 questions
- B-21 no left turn 36 questions
