I live in a state where the speed limit is 70 (and higher in some spots). I'm fine with the calculation, but the audio alerts.... come on, Automatic. It appears that feature was adjustable in previous version (reading through old posts), but not so now. So I'm stuck with the superfluous audibles while I'm driving back and forth to work? Everytime I get behind a slow-poke and then get back up to speed? You GOTTA put in options to mute this sucker.