Google says the AR function should not be used while driving. The Googler, who directs the project, Rachel Inman, says that the Google Maps AR navigation "for the moments like" I go from the subway, where do I go first? "" And if you use the phone AR mode will be disabled for one second to show the default Google Maps interface. To prevent users paying too much attention to the screen in front of them and having an accident, Google Maps reminds them to turn off the phone. If the user ignores this notice, the screen automatically darkens. This also prevents the battery from being discharged on a user's phone.
It may take some time for Google to say that AR navigation is ready for the main time. Once that's the case, those who need Google Maps for directions will enter a new world where they'll get information about the places they're passing. If you're traveling to a foreign country on foot, you can use the AR navigation feature with Google Translate to read signs in their main language.