2023 Iowa Code 321.255 – Local traffic-control devices

2022 Iowa Code 321.255 – Local traffic-control devices

2020 Iowa Code 321.255 – Local traffic-control devices

2018 Iowa Code 321.255 – Local traffic-control devices

2016 Iowa Code 321.255 – Local traffic-control devices

2014 Iowa Code 321.255 – Local traffic-control devices.

2009 Iowa Code 321.255 – Local traffic-control devices