Skip to content

Added Lane: What It Means & What To Do

Added Lane (W4-3) - diamond yellow with black warning sign: A new lane is being added
MUTCD CodeW4-3
CategoryWarning Signs
ShapeDiamond
ColorYellow with black

What Does the Added Lane Mean?

A new lane is being added. Entering traffic does not need to merge.

About This Sign

The added lane sign indicates the road is gaining a lane so entering traffic has its own lane.

Other Warning Signs

Frequently Asked Questions

What does the Added Lane mean?

A new lane is being added. Entering traffic does not need to merge.

What shape and color is the Added Lane?

The Added Lane uses the Diamond shape and Yellow with black coloring.

Practice Road Sign Questions

Test your knowledge of road signs with free DMV practice tests.

Added Lane Meaning 2026 - DMV Test Guide & Free Practice | DMV IQ