The ADOT safe-driving tips and resources at inform motorists about how to stay safe on Arizona’s roads.

Zipper Merge

road sign in a construction zone - Left Lane Closed Ahead

A new effort to reduce construction travel delays that requires the cooperation of motorists to effectively minimize traffic congestion.

Zipper Merge Example

The concept is simple: Using two lanes as long as possible into a lane restriction can move traffic more efficiently than everyone trying to merge earlier.

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