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Iowa Frost Laws, Seasonal Load Weight and Speed Restrictions – 2021

Frost laws and Spring Thaw went into effect March 15, 2021

You can find your 2021 Road Restrictions Map here:

You can also find other Road Restrictions Maps here:

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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