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Wisconsin Frost Laws, Seasonal Load Weight and Speed Restrictions – 2020

Last Update 04/26/19

Class II Roadway and Posted Road restrictions remain in effect in Zones 1 and 2, AND FOR STH 54 AND STH 173 IN WOOD COUNTY.  Class II Roadway and Posted Road restrictions will no longer be in effect in Zones 3, 4, and 5 as of 12:01 a.m., Thursday, April 25, 2019  The Frozen Road Period

Three distinct programs take advantage of the frozen pavement and sub-base conditions during the winter months and protect pavement's weak conditions during the springtime freezing and thawing period.

These three programs include:

  1. The frozen road declaration that is normally in effect from mid-December to late February or early March.
  2. The Class II roads - typically lasts from early March until the first or second week in May.
  3. The springtime posted roads program normally from the second week in March until late April or early May.

All three of these programs apply only to the state highway system. Local county or township road maintenance authorities are responsible for determining when their roads are either frozen or thawing and whether sections should be posted for weight limitations. Questions related to weight restrictions on local or county roads should be referred to the maintaining authority for those roads. Regional transportation offices can be contacted to answer specific questions related to the state highway system in their region.

Call (608) 266-8417 for a recorded message of the status of road weight restrictions.

Seasonal posted roads can be found at:


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