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Yellow diamond with black text reading SIGNAL AHEAD on two lines
MUTCD
W3-3a
Category
warning
Color
yellow
Shape
diamond

Signal Ahead

A traffic light is ahead; prepare to stop if the light is red or changes.

The text version of the signal-ahead warning, used where a traffic light beyond may be obscured or unexpected. Slow down and watch the signal indication so you can stop in time on red or yellow.

In the same family

Related signs

Yellow diamond with black border containing a thick black arrow that travels up and bends ninety degrees to point left.
Turn Left
Yellow diamond with black border containing a thick black arrow that travels up and bends ninety degrees to point right.
Turn Right
Yellow diamond with black border containing a thick black arrow that sweeps in a smooth curve from lower right up to the upper left.
Curve Left
Yellow diamond with black border containing a thick black arrow that sweeps in a smooth curve from lower left up to the upper right.
Curve Right
Yellow diamond with a black arrow pointing up that bends sharply left and then sharply right.
Reverse Turn (Left)
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