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DMV One Way

W4: Lanes and Merges

Learn the meaning of lanes and merges signs. Compare the pictures, read the driving guidance and follow the linked official sources.

Sign explanations are currently available in English.

Explore these signs

5 signs in this collection. Every sign’s meaning is free to read; a free account opens the full explanation. Study counts cover unique published English materials across all states; availability depends on your state and access plan.

5 signs

Merging traffic sign (W4-1)

Merging traffic

W4-1

  • 0 handbook slides
  • 2 questions
Meaning & what to do
Lane ends sign (W4-2)

Lane ends

W4-2

Meaning & what to do
Added lane sign (W4-3)

Added lane

W4-3

Meaning & what to do
Entering roadway merge sign (W4-5)

Entering roadway merge

W4-5

Meaning & what to do
Entering roadway added lane sign (W4-6)

Entering roadway added lane

W4-6

Meaning & what to do
Historical Lane ends merge left sign (W9-2)

Lane ends merge left sign

W9-2 Outdated standard

What changed

Sources & scope

Independent educational summaries by DMV One Way. Sign designs follow MUTCD conventions; state and local rules can add restrictions. Use your current state handbook and the signs on the road for the rules that apply to your trip.

Sources checked . Current guide illustrations: public-domain FHWA Standard Highway Signs. Historical illustrations: DMV One Way archive.