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How many flaggers does a lane closure need?

September 24, 2026 · B&F Traffic Control

B&F flagger and cones at a work zone

The honest answer is: it depends. The right number of flaggers comes from the job, not a standard package.

What drives the number

The type of work, the road layout, how much traffic there is, how far the work zone runs, and whether drivers can see from one end to the other. A short closure on a quiet street might need one; a long one on a busy road needs more.

When signals or devices change the math

On some one-lane, two-way setups, portable traffic signals can stand in for flaggers, especially on longer jobs. Arrow boards and good advance warning also change what the setup needs.

Don't pay for what you don't need

We look at your job and recommend the staffing it actually needs. If it can be done with fewer people and the right devices, we'll say so.

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How many flaggers does a lane closure need? | B&F Traffic Control