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Left Added Lane Signs are MUTCD Compliant (MUTCD W4-3L) and indicate that a new left lane is upcoming. Left Added Lane Signs are useful devices to help display official regulations and provide mandatory information to drivers on both private and public roadways.
Compliance
Section 2C.41 Added Lane Signs
Guidance
- The Added Lane (W4-3) sign should be installed in advance of a point where two roadways converge and merging movements are not required. When possible, the Added Lane sign should be placed such that it is visible from both roadways; if this is not possible, an Added Lane sign should be placed on the side of each roadway.
Source: 2009 MUTCD