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, or with arrows, the following colors only shall be used, and the terms and lights shall indicate and apply to drivers of vehicles and pedestrians 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 or barricade at such place prohibits either such 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 such signal is exhibited.
2. Pedestrians facing the signal may proceed across the roadway within any marked or unmarked crosswalk.
B. Steady Yellow Alone:
1. Vehicular traffic facing the signal is thereby warned that the red or "Stop" signal will be exhibited immediately thereafter, and such vehicular traffic shall not enter or be crossing the intersection when the red or "Stop" signal is exhibited.
2. Pedestrians facing such signal are thereby advised that there is insufficient time to cross the roadway, and any pedestrian then starting to cross shall yield the right of way to all vehicles.
C. Steady Red Alone, Or "Stop":
1. 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, or, while the signal is still red, vehicular traffic may turn right from the appropriate lane after coming to the required stop, unless otherwise provided by the city in which the signal is located, or unless hereinafter provided. Such vehicular traffic shall yield the right of way to pedestrians lawfully within an adjacent crosswalk and to other traffic lawfully using the intersection.
2. In order to prohibit right turns on the red signal after the required stop, a city must erect clear, concise signs informing drivers that such turns are prohibited. The highway department shall specify the design of the sign to be used for this purpose and it shall be used uniformly throughout the state.
3. No pedestrian facing such signal shall enter the roadway unless he can do so safely and without interfering with any vehicular traffic.
D. Steady 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 yield the right of way to pedestrians lawfully within a crosswalk and to other traffic lawfully using the intersection.
2. No pedestrian facing such signal shall enter the roadway until the green or "Go" is shown alone or until authorized so to do by pedestrian "Walk" signal.
E. Exceptions: 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 such sign or marking, the stop shall be made at the signal. (1980 Code § 20-31)