United States Permit Test Coach

Warning signsQuestion 45 of 223

Yellow diamond with a black signal housing with red, yellow, and green lights

What does this sign warn of?

A railroad signal ahead
A traffic signal ahead that you may not see in time
A flashing light for emergency vehicles
A broken signal ahead

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Correct answer: A traffic signal ahead that you may not see in time

A Signal Ahead sign is used when a traffic signal is hidden from view, for example by a hill or a bend. Be ready to stop.

Source: Manual on Uniform Traffic Control Devices for Streets and Highways (MUTCD), 11th Edition with Revision 1 (FHWA, December 2025), Section 2C.35 Advance Traffic Control Signs (W3-1, W3-2, W3-3, and W3-4), page 218

Practice warning signs

Questions last reviewed: 18 October 2026

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