Those grids are not a problem, they drive relatively fast for unpaved roads, but the grids completely disappear once you reach the mountains in the western thir

Those grids are not a problem, they drive relatively fast for unpaved roads, but the grids completely disappear once you reach the mountains in the western third of the US, even in large unbroken crop areas like The Palouse with proper rural roads. Many parts of the South are similar, though in those parts the meandering rural roads are defined more by water obstacles. The major highways in the rural west, on the other hand, are very fast (90 MPH is normal) once you get to them, but the geographic distances between places that resemble civilization on those highways are often quite large even at that speed.