Well I have been playing this for like 3/4 days, so don't know much about the limitations of this game, just spitting things out of my head. But yeah, if it would be possible to make the game identify every type of road and also water etc, would be much better than placing POIs everywhere.
I play since 3 and a half year.
You can't put a POI for everything.
That would force new players to spend 80% of their game time on placing POI instead of responding to calls. Not really enjoyable.