Iowa Frost Laws, Seasonal Load Weight and Speed Restrictions – 2025

Frost laws and Spring Thaw for 2025.

Iowa 2025 Spring Road Restrictions

You can find your 2025 Road Restrictions Map here: https://iowadot.gov/mvd/motorcarriers/Spring-Restriction-Map.pdf

You can also find other Road Restrictions Maps Click 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 is vague, and it appears that operators must be alert for closures.

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

Information Guide, Iowa DOT:

https://www.iowadot.gov/mvd/motorcarriers/truckguide.pdf