395, the Extratrrestrial Highway is also pretty open.
Highway 375 Norm, just an fyi
Did that too. We managed to drive 2,500 miles in two weeks (thank goodness for "unlimited miles"). One time, we were driving south on 93 after visiting Rachel. We were somewhere near Coyote Springs, the only car on the road, when my wife suddenly yelled "Oh, my GOD!" and the whole car shook! I looked out my window to see a fighter jet zooming away.
Yep, he buzzed us. :-)