Merge sign

MUTCD code W4-1 · Warning sign · Source: MUTCD 11th Edition, Section 2C.45

Test yourself

What does this sign warn you about?

• A divided highway ends ahead
• Traffic may merge into your lane ahead
• Your lane must exit the road ahead

Show the answer

Traffic may merge into your lane ahead

Watch for vehicles joining from the side, and adjust your speed or position to let them in.

Source: Manual on Uniform Traffic Control Devices, 11th Edition, Section 2C.45; Arizona Driver License Manual and Customer Service Guide, Section 3, Roadway and Vehicle Knowledge: Diamond, warning signs (p. 41); Tennessee Comprehensive Driver License Manual, Section B, Chapter 3, Traffic Signs and Signals: Warning Signs - Diamond Shape (p. 38); Section B, Chapter 5, Interstate Driving: Entering the Interstate (p. 68)

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