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On a construction site, which manual must flagger signals and warning garments follow?

Part 6 of the MUTCD, the Manual on Uniform Traffic Control Devices.

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  1. The National Electrical Code
  2. The International Building Code
  3. Part 6 of the MUTCD ✔

Why: 1926.201(a) says signaling by flaggers, including the warning garments they wear, must follow Part 6 of the Manual on Uniform Traffic Control Devices.

Huh, didn't know that: The same section says crane and hoist signals follow the applicable ANSI standards.

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Why did the flagger wear a bright vest? To be seen, not stopped.
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References

Answer: Part 6 of the MUTCD. 1926.201(a) says signaling by flaggers, including the warning garments they wear, must follow Part 6 of the Manual on Uniform Traffic Control Devices.

  1. 29 CFR 1926.201(a) www.law.cornell.edu/cfr/text/29/1926.201
    Signaling by flaggers and the use of flaggers, including warning garments worn by flaggers, shall conform to Part 6 of the MUTCD
    Checked 2026-10-10.

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