The option in the Project Settings makes the DTM and all the roads in the project read only, i.e. they cannot be edited.
The following roads functionality will be available:
Review Horizontal Alignment
Review Vertical Alignment
Review Edge Levels
Review Pipe Alignment
File ► Select Road File
All the buttons except OK and Cancel are disabled. The user can however, change the active road.
Review Junctions
Edit Vertical Alignment Window
Edit, insert and move PI does not work.
Graphically editing and inserting comments and user defined lines does not work.
Saving the spreadsheet does not work.
Edit Edge levels Window
Edit, insert and move points does not work.
Saving the spreadsheet does not work.
Section Graphical Edit
Edit, delete, move and insert point does not work.
Manual optimise function does not work.
In all the Alignment windows and the Graphical Section Editor the “Read Only” prompt will be displayed.