Anecdotally: I use Apple Maps when I need directions (mostly because it’s native/integrated and not google), for drives over an hour my experience is that the ETA time is +/- 5min even when there is lots of traffic.
Except in one edge case where my girlfriend and I were doing a 7 hour drive traveling east late at night on an empty highway and our eta increased by an hour then a little while later another hour, we were so confused and thought we might be driving in the wrong direction! Until we figured out we had crossed a time zone and it was also day light savings!
Except in one edge case where my girlfriend and I were doing a 7 hour drive traveling east late at night on an empty highway and our eta increased by an hour then a little while later another hour, we were so confused and thought we might be driving in the wrong direction! Until we figured out we had crossed a time zone and it was also day light savings!