Having sat this one out for a few days and seeing various comments about how boring driving on US Interstates can be, I was reminded of the book Blue Highways by William Least Heat Moon. The title comes from the non-major roads, traditionally rendered in blue on highway maps, and the book recounts Moon's non-highway drive across the U.S., where he made deliberate efforts to access the country's various regional communities. If you're planning a driving excursion to the U.S., it might be an interesting pre-visit read.