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Low Clearance: What It Means & What To Do

Low Clearance (W12-2) - diamond yellow with black warning sign: An overhead structure has limited vertical clearance
MUTCD CodeW12-2
CategoryWarning Signs
ShapeDiamond
ColorYellow with black

What Does the Low Clearance Mean?

An overhead structure has limited vertical clearance. Check your vehicle height.

About This Sign

The low clearance sign displays the maximum height that can pass under an overpass or bridge.

Where you will see it

You see this sign before an overpass or bridge that is low. It shows the maximum height of vehicle that can pass underneath.

What to do

  • Know your vehicle's height, including anything on the roof.
  • Compare it with the height shown on the sign.
  • Do not try to squeeze through; find another route if you are too tall.

A common mistake

Drivers forget about roof racks, loads or equipment that add to their height. A vehicle that is too tall can hit the structure, so check the whole height.

What to remember for the test

Remember the number on the sign is the maximum height that can pass under. If your vehicle is taller than that, you must not go through.

Other Warning Signs

Frequently Asked Questions

What does the Low Clearance mean?

An overhead structure has limited vertical clearance. Check your vehicle height.

What shape and color is the Low Clearance?

The Low Clearance uses the Diamond shape and Yellow with black coloring.

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