On non‐interstate roads only, trucks hauling food, medical supplies, cleaning products, or other household goods may exceed the weights listed in Iowa Code 321.463 by 12.5 percent without a permit, so long as they don’t exceed 20,000 pounds on an individual axle, and their total weight does not exceed 90,000 pounds. Trucks are still required to obey posted bridge restrictions.
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Get permits for oversize and overweight vehicles along state owned routes only. This includes Interstate, US, & IA routes. Permits for local or city routes should be obtained from those respective agencies.