A common cause is an excess mismatch between expected average speed settings and actual speeds. Go into your navigation preferences and change the expected average speed settings if necessary. This issue can occur even when the expected average speeds are realistic for normal conditions. For example, if my setting for average expected highway speed is set to 65 mph and my actual highway speed due to adverse weather is 45 mph, the ETA will be recalculated upward at some point during the trip. On our current in-dash Toyota nav systems, the ETA recalculation is not done continuously and usually happens towards the end of a trip.I tried the built-in nav for a 200 mile trip and it was strange. Part way through the trip it recalculated the ETA and added about 45 minutes for no apparent reason. I've made this trip hundreds of times and it always takes about three hours and 45 minutes. The built-in nav was initially correct, but changed the ETA to 4.5 hours later.
Not all streets get recorded. It sometimes takes years for streets to appear in online maps after they are recorded. For example, a private street and especially those in gated communities may never be recorded although the addresses on an unrecorded street often are. A primary source of map and address data comes from the census. One of my roles prior to the 2010 U.S. census was to electronically record the coordinates of the main entrances of thousands of structures where people live ... houses, apartment buildings, hotels, homeless shelters, prisons, convents, etc. When I encountered an unrecorded street, when possible I used electronic instruments to "map" the street as I slowly drove it.Android Auto has its own issues. The time calculation is generally spot on, but it is missing some streets which can give inaccurate directions. A house I used to own was on a street that Google Maps doesn't have. Looking up the address worked, but the directions showed me driving to an adjacent RV park and walking across the golf course(!)
Just to confirm.... Are you running the latest version of Android Auto on your phone? If you're not sure then just goto Google Play app on your phone and see if Android Auto requires an update.Update: I made another sincere attempt at Android Auto. Unfortunately, results were the same 2nd time too which is I can live without it. I tried Spotify, Maps and couple other apps.
Overall, using android auto means learning a brand new 3rd interface that is yet different from standard Android, or Toyota interfaces. Also, there is no easy way to navigate/switch between music/maps/standard Toyota functions. At minimum, Toyota needs to add a button to jump to what is calls "Projection" under Apps for CarPlay/Android Auto. The infotainment navigation of Android Auto is more clunky, slow, much lower touch sensitivity/reactions. This may not be all of Toyota's doing as these may be coming for App Developers. The automatic (and helpful) bird-eye view also supersedes other screen functions like Map turn instructions. I would like to continue to have birds-eye in stop and go traffic, and still be able to fumble with maps on a separate screen on my phone.
Next, I will try my wife's IOS. I have never been a primary IOS user but let's see if it fairs any better.
I do have the latest Android Auto. I don't see any Play store updates recommended. FWIW, I have Regular Note 10 current with all system updates.Just to confirm.... Are you running the latest version of Android Auto on your phone? If you're not sure then just goto Google Play app on your phone and see if Android Auto requires an update.
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I think the Android Auto interface is purposely simplified so it won't be a distraction to the driver. It looks like some changes are coming to it this spring.I do have the latest Android Auto. I don't see any Play store updates recommended. FWIW, I have Regular Note 10 current with all system updates.
For others who may have not tried Android auto but wondering what it is, well, it looks and feels nothing like phone interface. It is NOT like seeing same things that you do on your phone on car screen. Looks like app Designers add another custom interface that shows up on car screen. Among a few apps I sampled, Google map was close enough. Spotify, not so much.