ThinkabaraDo Not Pass sign
Regulatory signs · MUTCD R4-1
What it means
Passing other vehicles is not allowed on this stretch of road.
How to recognize it
White vertical rectangle with black letters.
What drivers do
Stay in your lane behind slower vehicles. It is often posted where you cannot see far ahead, like hills and curves.
Check yourself
Why might DO NOT PASS be posted on a two-lane road?
Learning summary, not legal advice. Traffic laws vary by state — check your state driver's handbook. Drawing: our own illustration of the standard MUTCD design.
Frequently asked questions
What does the Do Not Pass sign mean?
Passing other vehicles is not allowed on this stretch of road.
What should a driver do at a Do Not Pass sign?
Stay in your lane behind slower vehicles. It is often posted where you cannot see far ahead, like hills and curves.
What does the Do Not Pass sign look like?
White vertical rectangle with black letters. It is a regulatory sign (white, red or black). MUTCD code R4-1.