Idaho Spring Thaw Weight Restrictions (Frost Laws)

Idaho Spring Thaw Weight Restrictions

Idaho publishes restrictions through the 511 traveller map. There is no bulletin document to cite, so we watch the page and link to it.

Check Idaho 511 — travel 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 Idaho 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: Idaho Transportation Department
Authoritative page: https://511.idaho.gov/
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 05-15 — ITD posts spring break-up restrictions through Idaho 511 as districts thaw; no statutory season is published.
Polling cadence today: Outside Idaho's posting window by 117 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