4. Save as provided in articles 6 and 7 below, no person shall cause or permit any vehicle proceeding in the trunk road to make a U-turn, so as to proceed in the opposite direction, through the gap in the central reservation opposite:—
(a)Tufnell Park Road,
(b)Parkhurst Road and Seven Sisters Road,
(c)Camden Road and Tollington Road, or
(d)Loraine Road.