In Europe, we have tons of theme routes which often combine roads leading through scenic landscapes with stops at historical/cultural/interesting sites alongside. I am suggesting such theme routes in Bellisseria as a fun way to explore the continent, and as a little relief for those who struggle with the maze of the Bellisseria road network.
For this idea in SL, it would only need a few destination signs (right, left, straight on, possibly site of interest, start/end of theme road) which are placed at corresponding places/crossings/junctions. If done right, the signs wouldn't be too much of a disruption of the landscape either.
The design of the road sign could include, for example, a simplified lighthouse for a coastal route, maybe additionally the name of the specific theme route, and, of course, the sign should point into the correct direction.
Overall, it's a pretty simple thing but could help people to explore the continent, enjoy the atmosphere, or even find some sites they weren't aware of yet. It might also be an inspiration for people who enjoy creating maps. If it takes too much time for the LDPW themselves to figure out a route, they could consider to give residents / communities the opportunity of handing in their favourite theme route as a suggestion.