How does google map get the ever changing streets data? Be it traffic or general street map? It's accurate af! If a street is shut temporarily, it knows that and reroutes.
I understand that if there are others who are using Google maps in the area, it can aggregate and make an educated guess for every other user. But I am pretty sure it just can't rely on other users opening the app and having their gps on. Eg: live traffic data.. not everyone on the road is using maps!