Spring thaw restrictions · Michigan

Michigan Spring Thaw Weight Restrictions

Restrictions apply to routes marked "Seasonal" on the MDOT Truck Operators Map — a 25% axle-weight reduction on rigid pavement and 35% on flexible. Which pavement a given mile is, is a property of the road, not of the state, so we never compute the reduction ourselves.

Check MDOT — Spring Weight Restriction Bulletins before you dispatch.

This page mirrors the state's publication with a timestamp; it is not the authority. Read 1 day(s) ago (2026-09-08). The document itself is dated 2026-05-15. Open the state's own page.

In force on 2026-09-09

No restriction in force

We read MDOT — Spring Weight Restriction Bulletins on 2026-09-08 and it showed no restriction in force. Confirm on the state's own page before dispatch.

The source, and how we read it

HTML bulletin · Partly machine-readablePolled weekly (off season)
Publisher
Michigan Department of Transportation
Authoritative page
https://mdotjboss.state.mi.us/APSWB/SWBHome.htm?bulletin=weight
Format
HTML bulletin — Partly machine-readable
What we do with it
Parsed into dated restriction rows.
Posting season
02-01 to 06-01 — MDOT issues numbered Spring Weight Restriction Bulletins, each stating the moment it takes effect. The 2026 season ran bulletin #1 on Feb 17 to bulletin #8 on May 15, which lifted the last restriction statewide.
Polling cadence today
Outside Michigan's posting window by 100 days — polled weekly, so an unscheduled restriction and a broken source are both found before the season opens.
If our copy goes stale
It errs toward showing a restriction the state has already lifted, because this source publishes only what is currently in force.

Other states

All states and what each one publishes · Oversize & overweight permit calculator