Low Clearance 14'4" Sign
Maximum vehicle height is 14 feet 4 inches
What to do
Do not proceed if vehicle is taller than posted height.
Tips
Know your vehicle height before entering.
Test yourself
You see this sign while driving. What do you have to do?
Show the answer
Do not proceed if vehicle is taller than posted height.
Common mistake
Tall vehicles hitting low bridges or overpasses
About warning signs
Warning signs are diamond-shaped and yellow with black symbols. They alert you to hazards ahead — curves, intersections, crossings — so you have time to slow down. On the DMV written test, expect several questions asking what a specific warning sign means and what action it calls for.
Practice the rule this sign carries
This sign above an underpass tells you:
- A. The greatest height a vehicle can be to pass under it
- B. How far it is to the next underpass
- C. The lowest speed allowed under the structure
- D. The weight limit for the bridge overhead
Show answer
A. The greatest height a vehicle can be to pass under it — A low clearance sign posts the vertical space under the structure. Measure your vehicle with its load, and if you are taller than the posted figure, take another route rather than risk striking the overpass.
Universal rule · checked against MUTCD 11th Edition, Part 2, Chapter 2C — Warning Signs — Traffic Signs — Warning Signs · verified 2026-08-22
Frequently asked questions
What does the Low Clearance 14'4" Sign mean?
Maximum vehicle height is 14 feet 4 inches
What should you do at a Low Clearance 14'4" Sign?
Do not proceed if vehicle is taller than posted height.
Reference standard: Federal Highway Administration Manual on Uniform Traffic Control Devices ↗. State and local agencies may add rules or operating times, so follow the complete posted sign where you drive. How DMV Prep sources content.
Studying for a car permit instead? Drill all 111 signs with flashcards.
More warning signs
