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Portable traffic signals vs. flaggers

September 11, 2026 · B&F Traffic Control

When a road narrows to one lane for traffic in both directions, someone or something has to decide who goes. That's either flaggers or portable traffic signals.

Where flaggers fit

Flaggers can respond to what's in front of them: a truck that needs extra room, a pedestrian, an emergency vehicle. They're often the right choice for short jobs and changing conditions.

Where signals fit

Portable signals keep traffic alternating on a set cycle and can run for long periods. On longer jobs with steady conditions, they can be the more economical choice.

What both still need

Either way, the setup still needs advance warning signs and channelizing devices. We'll tell you which approach fits your job and your plan.

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