A work zone is only as safe as its setup. Most incidents in temporary traffic control (TTC) don't happen because a flagger didn't know their signals — they happen because something upstream got skipped: a sign placed in the wrong spot, a taper that's too short for the posted speed, a shift change where nobody re-checked the plan. This checklist covers the setup work that has to happen before anyone steps into the road, organized the way a crew actually moves through a shift.
Before You Leave the Yard
Get these confirmed while you're still on solid ground, not standing in a live lane figuring it out.
- Confirm the TTC plan matches the actual site. Road conditions change. Verify the approved plan still reflects current lane configuration, speed limit, and any nearby driveways or intersections.
- Check device inventory against the plan. Cones, drums, signs, arrow boards, barricades — count what the plan calls for, not what's sitting on the truck.
- Inspect retroreflectivity. Signs and paddles that have faded or been damaged don't meet MUTCD standards and don't protect anyone at night or in low visibility.
- Confirm PPE for every crew member. ANSI/ISEA Class 2 or Class 3 high-visibility apparel depending on road speed and worker proximity, hard hats, and appropriate footwear.
- Review the taper and buffer distances for the day's posted speed. These numbers change with speed limit — don't reuse yesterday's taper length without checking.
Setting Up the Work Zone
This is where most of the actual risk lives, because it's the only phase where crew members are working in or near live traffic without the protection of the finished zone.
- Place advance warning signs first, working from the flow of traffic backward toward the work area. Drivers need warning before they need to react.
- Set the taper using the correct spacing for the speed limit, not a rough guess. A taper that's too short doesn't give drivers enough distance to merge safely.
- Establish the buffer space before any worker enters the activity area. This is the space that absorbs an errant vehicle before it reaches a person.
- Position flaggers where they're visible from at least the minimum stopping sight distance for the posted speed — and confirm they have a clear escape route, not just a visible standing spot.
- Do a walk-through with the crew lead before opening the lane to traffic. A second set of eyes catches what the person setting up the cones didn't.
The 3 Most Common TTC Mistakes
- Reusing a taper or buffer distance from a different speed zone. These distances are not one-size-fits-all, and using the wrong one is one of the most common findings in work zone audits.
- Skipping the mid-shift check. Traffic volume, weather, and even device placement can drift over a shift. A zone that was compliant at 7 a.m. isn't automatically compliant at 2 p.m.
- Treating flagger positioning as “wherever there's room.” Positioning affects both driver reaction time and the flagger's own escape route — it's a safety decision, not a convenience one.
Keep This List Handy
We turned this into a one-page printable reference — the checklist above, plus a quick guide to standard flagger paddle positions, formatted to keep in a truck cab or clip to a clipboard. It's free.
Download the free Flagger & Work Zone Safety Quick-Reference →
Train Your Whole Crew, Not Just the Lead
A checklist helps the person who already understands why each step matters. If your crew is newer, or you're onboarding people faster than you can shadow-train them, that's a gap worth closing directly. Safe Zone Academy's instant-download courses cover TTC fundamentals, ADA considerations in work zones, and typical field applications — built so a new hire can go through the material before their first shift, not learn it by trial and error on-site.
This checklist is a field reference, not a substitute for your jurisdiction's MUTCD-based flagger certification or your company's site-specific safety program. Always follow your approved TTC plan and local requirements.