Paragraph 2
England and Wales
No advertisement shall be sited or displayed so as to—
(a)
endanger persons using any highway, railway, waterway, dock, harbour or aerodrome (civil or military);
(b)
obscure, or hinder the ready interpretation of, any traffic sign, railway signal or aid to navigation by water or air; or
(c)
hinder the operation of any device used for the purpose of security or surveillance or for measuring the speed of any vehicle.