TCP Builder › Plan library › Flagger Lane Closure plans

Flagger Lane Closure Traffic Control Plans

One lane is closed and flaggers alternate the two directions through the single open lane, one way at a time.

Real MUTCD dimensions, a title block, and a printable sheet — no account, no cost.

Build this plan free — takes about 2 minutes

What this setup is

A flagger lane closure is one lane of a two-lane, two-way road, with flaggers holding one direction while the other moves through. The controlling dimension is the one-lane two-way taper, which MUTCD fixes at 100 ft regardless of speed — but the advance sign spacing, the buffer, and the device spacing all move with the posted speed, and those are the numbers most sketches get wrong.

National MUTCD dimensions

Governing typical application: TA-10 — Lane Closure on a Two-Lane Road Using Flaggers. Assumptions: urban collector, 2 through lanes, 12 ft lanes, 12 ft lateral offset, 100 ft work space, short-term duration. Rule set MUTCD 11th Ed. + 50-state/DC adoption layer + ID/ACHD profiles, rule set 2026-08 rev 4. State pages below use the same engine with that state’s adopted rule set.

MUTCD 11th Edition Part 6 values computed by the TCP Builder engine.
Posted speed	Taper length (one lane two way)	Advance signs A / B / C	Longitudinal buffer	Device spacing taper / tangent	Channelizing devices
25 mph	100 ft	100 ft / 100 ft / 100 ft	155 ft	20 ft / 50 ft	19
35 mph	100 ft	250 ft / 250 ft / 250 ft	250 ft	20 ft / 70 ft	18
45 mph	100 ft	350 ft / 350 ft / 350 ft	360 ft	20 ft / 90 ft	19
55 mph	100 ft	350 ft / 350 ft / 350 ft	495 ft	20 ft / 110 ft	19

Flagger Lane Closure plans by state

Questions people actually ask

What does a flagger lane closure plan need in your state?

The same Part 6 elements everywhere: advance warning signs at the table spacing for the setting and speed, a flagger symbol sign and a flagger station on each approach, a 100 ft one-lane two-way taper, a longitudinal buffer equal to the stopping sight distance, and channelizing devices at the tabulated spacing. Local requirements sit on top of that, not instead of it.

How many cones do I need?

The count in the table is what the geometry requires: taper devices at the taper spacing, tangent devices along the work space at the tangent spacing, plus the downstream termination. It scales with the length of your work space, so set the real length in the builder before you buy or load.

Do two flaggers need radios?

If they cannot see each other, they need a way to communicate — radios, a pilot car, or a traffic control signal. MUTCD does not let a flagger release traffic into a lane the other end has not cleared. Sight distance between stations is the thing to check before you set up.

Real MUTCD dimensions, a title block, and a printable sheet — no account, no cost.

Build this plan free — takes about 2 minutes

DISCLAIMER — READ BEFORE USE

This traffic control plan was generated by an automated tool for planning and reference purposes only. It is based on the MUTCD 11th Edition Part 6 typical applications and the agency rule set selected above. It is not a certified, sealed, or professionally engineered document and has not been reviewed against actual field conditions at this site. It must be reviewed, adapted to field conditions, and approved by a qualified person — and, where required, by the permitting agency and/or a licensed Professional Engineer — before use. Field conditions govern. The user is solely responsible for work-zone safety, for conformance with all applicable federal, state, and local requirements, and for obtaining all required permits. PM Axsus disclaims all liability arising from use of this document.