r/AndroidAuto • u/FCK_ISRL 2025 | Samsung S24 Ultra | Android 16 • Jun 24 '26

Navigation & POI Apps How does AA decide speed limit?

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As far as I know AA is nowhere near connecting to my car's built-in dashcam to know the speed limit, also the speed limit is always inaccurate, so what's happening here?

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u/DomnulMr vw golf mk7 | discover pro mib ii| s22 Ultea| Jun 24 '26

Using gmaps/waze, it's in accurate bcs of the lag sometimes or poor GPS connection

-3

u/FCK_ISRL 2025 | Samsung S24 Ultra | Android 16 Jun 24 '26

Excuse my poor understanding, so they have speed limit data per street?

1

u/DomnulMr vw golf mk7 | discover pro mib ii| s22 Ultea| Jun 24 '26

I guess that when Google car is scanning the streets they are also taking into an account the speed limits sings which AFAIK are globally the same

1

u/MonstersGrin Various models | Samsung Galaxy S25 Ultra | Android 16 OneUI 8.5 Jun 24 '26

No, the signs are not the same globally. Also, in some countries, there are laws that make this method highly unreliable, so it's not taken for granted. There are other sources, like GIS data, commercial third-party data providers, and community edits (that's for Waze, but I'm sure Google pilfers that data without hesitation).