Driver's License Test Prep
Oregon Practice Warning Signs

What does the Low Clearance warning sign tell you?

  1. A.
    The bridge surface freezes before the rest of the road
  2. B.
    The overpass ahead has limited vertical clearance Correct
  3. C.
    The bridge ahead has a posted weight limit
  4. D.
    A narrow bridge ahead has one lane each way
The Why

The answer is "The overpass ahead has limited vertical clearance"

The Low Clearance sign warns that the overpass ahead has limited vertical clearance, and you should not proceed if your vehicle is too tall to pass under it. Weight limits, narrow bridges, and bridge icing each have their own signs. Substituting the separate narrow-bridge warning for the overpass-height warning this sign carries is what leads a driver to D.

Why the others miss

The traps in the wrong answers

A. The bridge surface freezes before the rest of the road

Bridge icing is a different warning sign that calls out freezing surfaces. This answer confuses the overpass clearance warning with a bridge-icing surface-condition warning.

C. The bridge ahead has a posted weight limit

Weight limits appear on regulatory signs, not the Low Clearance warning. This answer confuses a vertical clearance warning with a regulatory weight-limit restriction.

D. A narrow bridge ahead has one lane each way

Narrow bridge has its own warning sign separate from Low Clearance. This answer substitutes a different bridge-width warning for the overpass-height warning.

The Rule

This question tests your knowledge of Warning Signs in Oregon. Source: Oregon Driver Manual, "Warning Signs," p.12..

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