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Yellow diamond sign with up and down arrows around a height figure

Low Clearance sign

W12-2 warns of a low overhead structure and gives its height.

MUTCD code W12-2 · Warning sign · Source: MUTCD 11th Edition, Section 2C.25

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What does this sign warn you about?

Yellow diamond sign with up and down arrows around a height figure
  • A narrow lane with a width limit
  • A low overhead clearance ahead
  • A steep grade ahead
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A low overhead clearance ahead

The figure is the height under a bridge or other structure. Taller vehicles must not go under it.

Source: Manual on Uniform Traffic Control Devices, 11th Edition, Section 2C.25; 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: Low Clearance (p. 39)

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