Available with Location Referencing license.
The ArcGIS Location Referencing setup is designed to detect and upgrade an existing installation of Location Referencing. You don't need to uninstall previous versions of Location Referencing Desktop before installing a newer version.
Existing Pipeline Referencing users
All desktop functionality required for ArcGIS Pipeline Referencing is available in ArcGIS Pro as ArcGIS Location Referencing. If you publish your location referencing services using ArcGIS Pro, you do not need to install ArcGIS Pipeline Referencing Desktop (ArcMap).
Existing Roads and Highways users
The Roads and Highways setup is designed to detect and upgrade an existing installation of Roads and Highways. You don't need to uninstall previous versions of ArcGIS Roads and Highways Desktop before installing Roads and Highways 10.9.1.