I really wish it would do that. My car in particular. Recently I was traveling to a town about 20 miles away. Normally the route is along a specific US highway. For some reason the car sent me off the highway, down a parallel smaller road, and then later back to the highway. Strange, but maybe it knew about an accident or road closure I wasn’t aware of. On the way back home it tried a similar thing, but then I had a passenger who could double check on her phone with Google maps, and determined that the usual highway was fine. I ignored the car’s instructions, and went on the highway. It was fine.
The car has tried similar detours off the same highway since then. I’ve ignored them all, and never hit unusual traffic.
Now we know that the car is sometimes afraid of US-287, and to ignore it’s whining.
You have to take into consideration that most drivers are unsafe, poorly-skilled, inattentive, and willing to risk strangers’ lives to get where they’re going RIGHT NOW!
To the average chucklehead, if Waze or whatever DIDN’T instruct them to go across 6 lanes in 100 meters they would be pissed off. That’s the way they drive without satnav so they expect the driving apps to plan routes that way. Same with making left turns across 2 or 3 lanes.
“Don’t take your usual route, turn left up here. Oooh, now that you’re in the left turn lane I’m afraid I’m going to have to ask you to turn left two miles from now. Oh, you’re trapped in the left turn lane because traffic is so heavy? So sorry, I’m just gonna route you around this traffic jam… Into another traffic jam. Five times.”