Traffic calming
Road humps ahead for half a mile
What it means
"Humps for half a mile" sits under the hump warning triangle and tells you how far they run - so this is not one bump, it is a whole stretch of them. Common through a calmed residential area. Pick a steady low speed and stay there, rather than accelerating and braking between every single hump.
Highway Code Rule 153 — read it on GOV.UK
More on signs like this: Road sign shapes and colours explained: the system behind UK signs
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Other traffic calming
Sign images: Department for Transport, © Crown copyright. Used under the Open Government Licence v3.0.