Been there.
Outside Wheatley, Ar.
I40 flooded. They routed us north. A good 95miles off track. GPS kept telling me to go west, get out of the traffic.
Resisted the urge, as all the routes it spotted looked to go into a field.
180miles,and 9hrs later, I laid down in Hope, Ar.
That was the one time I didnt try to find a shortcut and it was long and painful, but worked out.
That was because 2 times before, I thought I was slick, tried my own way. Ended up in corn fields, dead ends, residentials, ect.