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

Frost laws and Spring Thaw went into effect March 15, 2019

You can find your 2019 Road Restrictions Map here: https://iowadot.gov/mvd/motorcarriers/restrictionmap.pdf

You can also find other Road Restrictions Maps here: https://iowadot.gov/mvd/motorcarriers/maps

At the discretion of the Motor Carrier Services Division. Seasonal weight embargoes and temporary or permanent bridge weight limits must be signed and posted by the governing agency (jurisdiction). Editor's Note: Specific guidance on seasonal restrictions are vague, and it appears that operators must be alert for closures.

For information on restrictions, call the Iowa DOT, Motor Carrier Services, at 515-237-3264.

Information Guide, Iowa DOT:


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