§ 70.18 TRAFFIC-CONTROL SIGNAL LEGEND.
   Whenever traffic is controlled by traffic-control signals exhibiting the words “Go”, “Caution”, or “Stop”, or exhibiting different colored lights successively one at a time, the following colors only shall be used, and said terms and lights shall indicate as follows.
   (A)   Green alone or “Go”.
      (1)   Vehicular traffic facing the signal may proceed straight through or turn right or left unless a sign at such place prohibits either such turn. But vehicular traffic shall yield the right-of-way to other vehicles and to pedestrians lawfully within the intersection at the time such signal is exhibited.
      (2)   Pedestrians facing the signal may proceed across the roadway within any marked or unmarked crosswalk.
   (B)   Yellow alone or “Caution” when shown following the green or “Go” signal.
      (1)   Vehicular traffic facing the signal shall stop before entering the nearest crosswalk at the intersection, but if such stop cannot be made in safety, a vehicle may be driven cautiously through the intersection.
      (2)   Pedestrians facing such signal are thereby advised that there is insufficient time to cross a roadway and any pedestrian then starting to cross shall yield the right-of-way to all vehicles.
   (C)   Red alone or “Stop”.
      (1)   Vehicular traffic facing the signal shall stop before entering the nearest crosswalk at an intersection or at such other point as may be indicated by a clearly visible line, and shall remain standing until green or “Go” is shown alone.
      (2)   No pedestrian facing such signal shall enter the roadway unless he or she can do so safely and without interfering with any vehicular traffic.
   (D)   Red with green arrow.
      (1)   Vehicular traffic facing such signal may cautiously enter the intersection only to make the movement indicated by such arrow, but shall not interfere with other traffic.
      (2)   No pedestrian facing such signal shall enter the roadway unless he or she can do so safely and without interfering with any vehicular traffic.
(2013 Code, § 17-65) Penalty, see § 70.99