Whenever vehicular traffic is controlled and directed by overhead lane-control signals displaying illuminated colored indications, one over each lane, the following indications only shall be used and the illuminated colored lane-control-signal indications shall apply to drivers of vehicles as follows:
(a) Downward-pointing Green Arrow. A driver facing this indication is permitted to drive in the lane over which the arrow signal is located. Otherwise he shall obey all other traffic controls present and follow normal safe driving practices.
(b) Red X Symbol. A driver facing this indication shall not drive in the lane over which the symbol is located, and this indication shall modify accordingly the meaning of all other traffic controls present. Otherwise he shall obey all other traffic controls and follow normal safe driving practices.
(c) Yellow X Symbol. A driver facing this indication should prepare to vacate the lane over which the signal is located, in a safe manner to avoid occupying that lane when a steady red X is displayed.
(Added Coun. J. 7-12-90, p. 18634)