A 3-minute lesson from the Wisconsin course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.
Traffic signals tell you when and where to stop or go, usually at intersections. Steady lights and flashing lights mean different things, and arrows apply only to the direction they point.
Know the rule
Signal lights are red (top), yellow (middle) and green (bottom). Many intersections in the country have a single yellow or red light.
If a traffic light loses power or isn't working right, proceed as if it were a stop sign. If a police officer is directing traffic, follow their directions.
Steady green: you may go, but you must yield to emergency vehicles and others as required by law. If you were stopped and it turns green, let cross traffic clear before going.
You're heading to an intersection whose signals are dark after a storm. Treat it as a stop sign: stop fully, take turns with the other drivers, and go when it's safe. If an officer is directing traffic, follow the officer instead.
Check your understanding
Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.
What must you do at a steady red light?
Slow down and proceed if clear
Stop only if other cars are present
Come to a full stop
Yield only, no full stop
Answer: Come to a full stop
A steady red light requires you to come to a full stop.
