[F1 Construction of road humps by highway authorityE+W+S
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4A highway authority may construct road humps in a highway for which they are the highway authority if—E+W+S
(a)the highway is subject to a statutory speed limit for motor vehicles of 30 miles per hour or less; or
(b)the road humps are especialy authorised by the Secretary of State,
and may remove any road humps so constructed by them.]