There is a way to improve this. But it would require a lot of work. For instance your concrete paths; if you bring them into a program like
fragmotion, you can delete the 2 faces on the bottom of them and this will reduce your polycount. For objects like buildings I would recommend removing the faces off the bottoms of those too.
I'll do one of them for you since its a simple mesh.
- Download the pavement.x attachment file.
- Go to:
Model Pack 2 > Scenery > Urban >
- Backup your original pavement.x file somewhere else that is located in the Urban folder
- copy the the downloaded pavement.x file into that folder.
All your pavements should now use less polys. Also, I just checked out all the FPE files for the pavement and curbs (kerbs) and they all appear to be static. So no worries there.