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One lane two way

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Traffic OS — Flagger hand-signaling procedures explained

Sep 17, 2026

Flagger Hand-Signaling Procedures Explained: Paddle, Flag and the Single-Flagger Rule

How the MUTCD expects a flagger to stop, release and slow traffic, when a red flag is acceptable, when one flagger can run a one-lane two-way closure instead of two, and what a traffic control company should build around those rules.