So basicly I'm going to start a new japanese city called "Inagawa". This would be a hyperrealistic japanese city and my most ambitious project.
Here is the map where is going to be the city and I will add artificial islands, and modify the shoreline. My inspiration is Osaka, Japan.
Some of your ideas can be useful so comment them (even tho I already have the road marking meanings manual and a lot more of guides and helps)