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Michigan Multilane Lane Closure Traffic Control Plan
Close one lane of a four-or-more-lane, non-divided road and traffic merges past the work behind a taper and an arrow board — MUTCD TA-30. The merging taper is the long one, and it grows fast with speed. Here is what the engine computes for Michigan at 25, 35, 45, and 55 mph.
Real MUTCD dimensions, a title block, and a printable sheet — no account, no cost.
Build this plan free — takes about 2 minutesComputed MUTCD dimensions
Governing typical application: TA-30 — Lane Closure on a Multilane Street. Assumptions: urban collector, 4 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.
| Posted speed | Taper length (merging) | Advance signs A / B / C | Longitudinal buffer | Device spacing taper / tangent | Channelizing devices |
|---|---|---|---|---|---|
| 25 mph | 125 ft | 100 ft / 100 ft / 100 ft | 155 ft | 25 ft / 50 ft | 18 |
| 35 mph | 245 ft | 250 ft / 250 ft / 250 ft | 250 ft | 35 ft / 70 ft | 18 |
| 45 mph | 540 ft | 350 ft / 350 ft / 350 ft | 360 ft | 45 ft / 90 ft | 24 |
| 55 mph | 660 ft | 350 ft / 350 ft / 350 ft | 495 ft | 55 ft / 110 ft | 23 |
What applies in Michigan
- Agency rule set
- State of Michigan (MUTCD as adopted)
- MUTCD adoption
- Publishes its own state MUTCD (cross-checked against a second source)
- State manual
- Michigan MUTCD (MMUTCD), published by MDOT
Printed on every Michigan sheet:
- Michigan publishes its own MUTCD — the Michigan MUTCD (MMUTCD), published by MDOT; this sheet uses National MUTCD default values as a planning baseline — the state manual controls and must be checked before submittal.
This rule set holds no Michigan-specific permit form, review time, or closure-hour restriction, so none is shown. Those are set by whoever owns the road — state DOT, county, city, or highway district — and have to come from them.
Governing citation: Michigan — MUTCD adoption recorded as: state MUTCD published (Michigan MUTCD (MMUTCD), published by MDOT). Bucket taken from secondary compilations of 11th-Edition state MUTCD adoption current to mid-2026; FHWA’s own state adoption listing was unreachable from the build environment and has not been checked directly. Cross-checked against a second independent source. Michigan appears on the long-standing list of states publishing their own MUTCD. This rule set asserts no Michigan-specific numeric requirement; adoption status best-effort — verify against FHWA’s state adoption listing (“MUTCD information by State”) and the state DOT before submittal.
Questions people actually ask
How long is the merging taper for a lane closure in Michigan?
It depends on posted speed and the width being closed. MUTCD uses L = W·S²/60 below 45 mph and L = W·S at 45 mph and above. The table above computes it for a 12 ft lane at four speeds; the builder recomputes it for your actual lane width.
Do I need an arrow board?
For a stationary lane closure on a multilane road, yes — the arrow board goes at the beginning of the merging taper. It supplements the channelizing devices and the advance signs; it does not replace either.
Does this cover freeway and divided-highway closures?
No, and the tool refuses rather than approximating. TA-30 assumes a non-divided two-way road with four or more through lanes. Divided highways and freeways run off their own plates and need a sheet designed for them.
Real MUTCD dimensions, a title block, and a printable sheet — no account, no cost.
Build this plan free — takes about 2 minutesDISCLAIMER — 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.