In additional to the extensive multi-country road and highway shields library provided by TatukGIS, anyone can use their own SVG format shields (and other symbols) in TatukGIS projects or incorporate their own symbols library into the software.
Refer to the guidance on this topic provided at the following pages of the DK online documentation.
SVG Shield Construction (how to create a shield symbol)
SVG Symbol Library Compiler (create a user-defined SVG symbols library)
SVG Symbol Library Complete List (the TatukGIS provided symbols library, including road shields)