Lane Ends Sign
MUTCD W9-1
The right lane ends ahead; merge left.
What it looks like
A yellow diamond-shaped warning sign with a black symbol showing the right lane narrowing and ending into a single lane.
When you'll see it
Ahead of points where a multi-lane road drops the right lane, common near the end of added lanes, work zones, and lane reductions.
What to do
Merge left in good time; adjust your speed and signal to move into the continuing lane before the right lane ends.
Related signs
Source: Manual on Uniform Traffic Control Devices (MUTCD), 11th Edition — FHWA.