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Yellow diamond sign with a traffic signal symbol

Signal Ahead sign

W3-3 warns of a traffic signal ahead.

MUTCD code W3-3 · Warning sign · Source: MUTCD 11th Edition, Section 2C.35

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What does this sign warn you about?

Yellow diamond sign with a traffic signal symbol
  • A pedestrian crossing has lights
  • A traffic signal is ahead
  • A railroad gate is just ahead
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A traffic signal is ahead

Be ready to stop, as the signal may be hard to see or may change as you approach.

Source: Manual on Uniform Traffic Control Devices, 11th Edition, Section 2C.35; Arizona Driver License Manual and Customer Service Guide, Section 3, Roadway and Vehicle Knowledge: Diamond, warning signs (p. 41); Tennessee Comprehensive Driver License Manual, Section B, Chapter 3, Traffic Signs and Signals: Warning Signs - Diamond Shape (p. 38)

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DMV Decoded is an independent guide, not a government agency. Check your state's driver handbook for the signs on its test.