ThinkabaraSignal Ahead sign
Warning signs · MUTCD W3-3
What it means
There is a traffic light ahead.
How to recognize it
Yellow diamond with a traffic light.
What drivers do
Be ready to stop if the light is yellow or red.
For kids walking and biking
Use the crosswalk at the light and wait for the WALK signal.
Check yourself
What does a yellow diamond with a traffic light mean?
Learning summary, not legal advice. Traffic laws vary by state — check your state driver's handbook. Drawing: our own illustration of the standard MUTCD design.
Frequently asked questions
What does the Signal Ahead sign mean?
There is a traffic light ahead.
What should a driver do at a Signal Ahead sign?
Be ready to stop if the light is yellow or red.
What does the Signal Ahead sign look like?
Yellow diamond with a traffic light. It is a warning sign (yellow). MUTCD code W3-3.