Versions of Iowa Code 321.454 - Width of vehicles on LawServer 2023 Iowa Code 321.454 – Width of vehicles 2022 Iowa Code 321.454 – Width of vehicles 2020 Iowa Code 321.454 – Width of vehicles 2018 Iowa Code 321.454 – Width of vehicles 2016 Iowa Code 321.454 – Width of vehicles 2014 Iowa Code 321.454 – Width of vehicles. 2009 Iowa Code 321.454 – Width of vehicles