It seems difficult even to imagine the modern West without reference to its planes, trains, and automobiles. Freeways define modern Los Angeles, as Route 66 still recalls the freedom of the open road. Seattle, long home to Boeing, gave birth to jetliners such as the 707. And once trains with glamorous names like The Sunset Limited and The Great Northern Flyer carried passengers in posh luxury through the grand vistas of the West. "Railways, highways,...