Iowa Code Title VIII. Transportation [Chs. 306-330B] § 314.16A. Interstate road designation--prohibition

The department of transportation and the state transportation commission shall not pursue an interstate road designation for the segment of highway that is a controlled-access facility, as defined in section 306A.2, designated as state highway 5 and United States highway 65, including where the highway designations overlap, between interstate 35 and interstate 80, unless the United States government provides an exemption to federal regulations regarding vehicle weight and size on that segment.  The federal exemption must authorize any vehicle that is not prohibited from being operated on the segment prior to the date of designation as an interstate road to continue to be operated on the segment after designation as an interstate road.