Driver's License Test Prep
Yellow diamond with two black upward arrows; the right arrow curves up from below to run parallel with the straight left arrow, separated by a dashed line.
MUTCD
W4-3R
Category
warning
Color
yellow
Shape
diamond
National · MUTCD Sign Reference

Added Lane (Right)

A new lane joins the roadway from the right; through traffic should be aware of merging vehicles.

A new traffic lane is being added from the right, so two roadways are combining without anyone having to merge. Traffic entering from the right gets its own lane alongside yours, but stay alert for drivers who may change lanes after the join.

In the same family

Related signs

Yellow diamond with black border containing a thick black arrow that travels up and bends ninety degrees to point left.
Turn Left
Yellow diamond with black border containing a thick black arrow that travels up and bends ninety degrees to point right.
Turn Right
Yellow diamond with black border containing a thick black arrow that sweeps in a smooth curve from lower right up to the upper left.
Curve Left
Yellow diamond with black border containing a thick black arrow that sweeps in a smooth curve from lower left up to the upper right.
Curve Right
Yellow diamond with black border showing a black curving arrow sweeping up and to the left, with the numerals 35 below it.
Curve Left With Advisory Speed
Source

Wikimedia Commons: File:MUTCD W4-3R.svg (Public domain)

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