Standard Traffic Signals
The standard sequence of an automated traffic signal is green-yellow red-green. These
signals must be obeyed unless a traffic officer is directing traffic or to make room for
emergency vehicles. If a traffic signal is not operational (dark) because of a power failure
or other cause and no peace officer, flagger or other traffic control is in place, the intersection shall be treated as an all-way stop.
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Red Traffic Light
STOP - come to a complete stop before reaching the intersection, stop line or crosswalk, and remain stopped as long as the light is red. During a power failure when the signal lights are not operating, a dark (uncovered) signal light is to be taken as a stop sign.
Yellow Traffic Light
Caution – a steady yellow light is a warning that the light is about to change. If the vehicle has not entered the intersection, it should be brought to a safe stop. If in the intersection, continue moving and clear it safely. Speeding up to "beat the light" is unlawful.
Green Traffic Light
Go – A vehicle may proceed through an intersection in the direction indicated by the signal if the roadway is clear.
S3: Lesson 1: Driver's Education
Nicole Goeschel
Created on September 5, 2025
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Transcript
Standard Traffic Signals
The standard sequence of an automated traffic signal is green-yellow red-green. These signals must be obeyed unless a traffic officer is directing traffic or to make room for emergency vehicles. If a traffic signal is not operational (dark) because of a power failure or other cause and no peace officer, flagger or other traffic control is in place, the intersection shall be treated as an all-way stop.
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Red Traffic Light
STOP - come to a complete stop before reaching the intersection, stop line or crosswalk, and remain stopped as long as the light is red. During a power failure when the signal lights are not operating, a dark (uncovered) signal light is to be taken as a stop sign.
Yellow Traffic Light
Caution – a steady yellow light is a warning that the light is about to change. If the vehicle has not entered the intersection, it should be brought to a safe stop. If in the intersection, continue moving and clear it safely. Speeding up to "beat the light" is unlawful.
Green Traffic Light
Go – A vehicle may proceed through an intersection in the direction indicated by the signal if the roadway is clear.