The USGS announces the sunset of National Map High Resolution Orthoimagery Data and Service
Source: https://www.usgs.gov/news/imagery-services-update-national-map
The Bentley GeoCoordination Services index this data source so our user can easily get access to those high-resolution images.
We are working on a solution. In the meantime, it is still possible to manually download and import this dataset using USGS Earth Explorer.
To do so, you can search for High Resolution Orthoimagery. Earth Explorer Help: https://lta.cr.usgs.gov/ee_help
Note that you must create an account to download data from this site.
Once downloaded, images can be imported in OpenRoads ConceptStation from the Import dialog.
Refer to the documentation for details on how to import terrain and images in ConceptStation.