(A) Traffic-control signals exhibiting the words "Go," "Caution" or "Stop" or exhibiting different colored lights successively one at a time, or with arrows, shall show the following colors only and shall apply to drivers of vehicles and pedestrians as follows.
(1) Green alone or "Go".
(a) Vehicular traffic facing the signal may proceed straight through or turn right or left unless a sign at the place prohibits the turn. But vehicular traffic, including vehicles turning right or left, shall yield the right-of-way to other vehicles and to pedestrians lawfully within the intersection or an adjacent crosswalk at the time the signal is exhibited.
(b) Pedestrians facing the signal may proceed across the roadway within any marked or unmarked crosswalk.
(2) Steady yellow alone or "Caution".
(a) Vehicular traffic facing the signal is thereby warned that the red or "Stop" signal will be exhibited immediately thereafter, and the vehicular traffic shall not enter or be crossing the intersection when the red or "Stop" signal is exhibited.
(b) Pedestrians facing the signal shall not enter the roadway unless authorized so to do by a pedestrian "Walk" signal.
(3) Steady red alone or "Stop".
(a) Vehicular traffic facing the signal shall stop before entering the crosswalk on the near side of the intersection or, if none, then before entering the intersection and shall remain standing until green or "Go" is shown alone.
(b) A right turn on a red signal shall be permitted at intersections within the city; provided that, the prospective turning car shall come to a full and complete stop before turning and that the turning car shall yield the right-of-way to pedestrians and cross traffic traveling in accordance with their traffic signal. However, the turn will not endanger other traffic lawfully using the intersection. A right turn on red shall be permitted at all intersections, except those that are clearly marked by a "No Turns on Red" sign erected by the city.
(c) The driver of a motorcycle approaching an intersection that is controlled by a traffic-control signal utilizing a vehicle detection device that is inoperative due to the size of the motorcycle shall come to a full and complete stop at the intersection and, after exercising due care as provided by law, may proceed with due caution when it is safe to do so. It is not a defense to § 15-108 that the driver of a motorcycle proceeded under the belief that a traffic-control signal utilized a vehicle detection device or was inoperative due to the size of the motorcycle when the signal did not utilize a vehicle detection device or that any device was not in fact inoperative due to the size of the motorcycle.
(d) Pedestrians facing the signal shall not enter the roadway unless authorized to do so by a pedestrian "Walk" signal.
(4) Steady red with green arrow.
(a) Vehicular traffic facing the signal may cautiously enter the intersection only to make the movement indicated by the arrow, but shall yield the right-of-way to pedestrians lawfully within a crosswalk and to other traffic lawfully using the intersection.
(b) Pedestrians facing the signal shall not enter the roadway unless authorized so to do by a pedestrian "Walk" signal.
(B) In the event an official traffic-control signal is erected and maintained at a place other than an intersection, the provisions of this section shall be applicable, except as to those provisions which, by their nature, can have no application. Any stop required shall be made at a sign or marking on the pavement indicating where the stop shall be made, but in the absence of any sign or marking the stop shall be made a vehicle length short of the signal.
(1989 Code, § 15-507, modified)