Iowa Code Title VIII. Transportation [Chs. 306-330B] § 314.10. State-line highways

The agency in control of any highway or bridge bordering on or crossing a state line is authorized to confer and agree with the agency or official of such border state, or subdivision of such state, having control of such highway or bridge relative to the interstate connection, the plans for the improvement, and maintenance, the division of work and the apportionment of cost of such highway or bridge.