The repeal by this Act of subsection (2) of section forty-six of the M1Road Traffic Act 1956, shall not affect the validation effected thereby of any scheme for the establishment on a road of crossings for foot passengers, and the repeal by this Act of subsection (3) of that section shall not affect the validation effected thereby of regulations under section eighteen of the M2Road Traffic Act 1934; but nothing in this paragraph shall affect any proceedings for a contravention of such regulations which were pending at the coming into operation of the said section forty-six.