This is clearly not the optimal road trip, since it passes through Nebraska.
But it does go on US2 in Montana, which is one of my criteria for an "optimal" trip through US.
But insofar as Nebraska is concerned, I have relatives there, and during one family reunion, we all went to the 4th of July parade in Hoskins. The large painted sign said "Parade at 8 am, pancake breakfast at 8:30". Not a large town.
But then I grew up 6 miles outside of a town of 3000, so I am not all that in favor of large towns.