Warning signMUTCD W14-3Pennant · yellow
No Passing Zone Sign
What it means
A no-passing zone begins here on a two-lane road.
What you should do
Do not start passing; the zone lasts until a Pass With Care sign or the end of the solid line.
Don't confuse it with
Pass With Care (R4-2)The no-passing zone has ended; you may pass when it is safe.
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All 35 →Sign image: public domain, via Wikimedia Commons. Sources