C3D 2018
Info: WisDOT has replaced Civil 3D 2018 with Civil 3D 2020 for all WisDOT staff and encourage consultants to use Civil 3D 2020 for all project developed with Civil 3D 2018. This will allow for continued WisDOT standards functionality. WisDOT has experience good result with backwards compatibility between Civil 3D 2020 and 2018, but all information and issues concerning backwards compatibility are the results and responsibility of Autodesk.
See C3D 2020