Montana Spring Thaw Weight Restrictions (Frost Laws)

Montana Spring Thaw Weight Restrictions

Published through the statewide travel-information map rather than as a bulletin, so we link to it and watch it for change rather than claiming a parsed limit.

Check MDT — Travel Information: restrictions 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 states no date of its own. Open the state's own page.

In force on 2026-09-09

Status unknown — check the state

We hold no confirmed restriction list for Montana right now. That is not the same as "no restrictions" — open the state's page below.

The source, and how we read it

Map viewer · Not machine-readablePolled weekly (off season)

Publisher: Montana Department of Transportation
Authoritative page: https://www.mdt.mt.gov/travinfo/restrictions.aspx
Format: Map viewer — Not machine-readable
What we do with it: Watched for change and linked. We do not synthesise a limit from a map or a PDF.
Posting season: 02-01 to 05-31 — MDT posts spring break-up restrictions through its travel-information system as districts thaw; no fixed statutory season is published, so the window is the observed spread of MDT restriction notices.
Polling cadence today: Outside Montana's posting window by 101 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.

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