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White sign reading CENTER LANE ONLY with opposing left-turn arrows

Two-Way Left Turn Only sign

R3-9b marks a center lane used only for left turns by traffic from both directions.

MUTCD code R3-9b · Regulatory sign · Source: MUTCD 11th Edition, Section 2B.32

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What does this sign mean?

White sign reading CENTER LANE ONLY with opposing left-turn arrows
  • The center lane is for left turns from both directions
  • The center lane is a passing lane for one direction
  • The center lane is closed to all traffic
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The center lane is for left turns from both directions

Vehicles going both ways use this lane to turn left, so watch for drivers coming toward you in it.

Source: Manual on Uniform Traffic Control Devices, 11th Edition, Section 2B.32; Tennessee Comprehensive Driver License Manual, Section B, Chapter 3, Traffic Signs and Signals: lane control signs (pp. 36-37); Section B, Chapter 4, Rules of the Road: Shared Center Turn/Two-Way Left Turn Lane (p. 60)

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