60Traffic signs in connection with experimental traffic schemes in London.
For the purpose of giving notice of any prohibition, restriction or requirement imposed by regulations under section 11 of this Act a constable, or a person acting under the instructions (whether general or specific) of the commissioner of police of the metropolis or the commissioner of police for the City of London, may place on a highway, or on any structure on a highway, traffic signs of any size, colour and type prescribed or authorised under section 54 of this Act.