- Steady green: you may go straight or turn after yielding to vehicles and pedestrians already in the intersection.
- Steady yellow (amber): red is about to appear; stop if you can do so safely.
- Steady red: come to a complete stop.
- Flashing red: stop completely, then proceed when safe (like a stop sign).
- Flashing yellow: drive with caution through the intersection.
- Flashing green: an advanced (protected) turn; oncoming traffic faces a red light.
- Yellow left-turn arrow: the protected turn is ending; do not start a left turn, and stop if you can do so safely.
- Transit priority signal: a white vertical bar on a dark background lets the transit vehicle proceed while conflicting traffic is held at red.
- Power failure: if the lights are dark, treat the intersection as an all-way stop.
Recall: What does a flashing red light require? What does a transit priority signal allow a bus to do?