They do put a lot of “access roads” that are not open to the public.
My new favorite is google maps telling me a route is shorter but it tells me it’s a toll road. But in reality, it’s a ferry across a river that’s only available certain hours during part of the year.
Try OpenStreetMap, if it’s wrong you can edit the access rights yourself
Do you know of a good OSM mobile client for Android?
OSMAnd, Organic Maps, Magic Earth (my favourite but not open source)
Organic Maps
At least with open street map, you can login to openstreetmap.org/edit and mark the bad road as private/gated or even delete it entirely. I did it on a bad road segment in my neighborhood and ride-sharing drivers no longer made wrong turns there (Grab apparently uses OSM instead of Google Maps data).
