Re: Garmin does the same thing.
Not according to recent practical experiment, it don't.
Long Island, Belt Parkway, Verrazano Narrows Bridge, Staten Island Expressway, Goethal's Bridge, I95 South to Sunny Florida, Land of Giant Anthropomorphic Mice. No suggestion that this journey would be improved by a trip into scenic lower Manhattan for an hour at the hands of the NY Traffic Cops (who at rush hour have the job of madly waving you away from the signposted routes to the way out of Manhattan so you can fully savor the chaos).
Return trip unblighted by cries of Garmin GPS desperate to go on sightseeing tour of TriBeCa and SoHo at night.