We travel using navigation apps and totally commit to their algorithm even if we don't understand them. They send you on a different route if it is one minute faster. That might make efficiency sense, but it may not actually be the best route.
On our drive from North Carolina to Connecticut, our initial route was 30-45 minutes longer than usual. It turned out that rather than going through Baltimore, we were re-routed east and over the Chesapeake Bay Bridge near Annapolis. But the craziest re-routing took place in New Jersey where we changed highways, the app got stuck bouncing back and forth between multiple routes and sent us through residential neighborhoods to avoid changing traffic on the way between highways. The traffic would had have to have been hours at a standstill for our route to have been better.