New Roads and Street Works Act 1991

151 Special precautions as to displaying of lights

(1) An undertaker executing road works in a road which crosses, or is crossed by, or is in the vicinity of, a railway, tramway, dock, harbour, pier, canal or inland navigation, shall comply with any reasonable requirements imposed by the transport authority concerned with respect to the displaying of lights so as to avoid any risk of their—

(a) being mistaken for any signal light or other light used for controlling, directing or securing the safety of traffic thereon, or

(b) being a hindrance to the ready interpretation of any such signal or other light.

(2) An undertaker who fails to comply with any such requirement commits an offence and is liable on summary conviction to a fine not exceeding level 3 on the standard scale.

(3) In proceedings for such an offence it is a defence for the undertaker to show that all reasonable care was taken by him, and by his contractors and by persons in his employ or that of his contractors, to secure that no such failure occurred.