We fully agree with you, particularly in Florida. In Florida we only stay on the Interstate until the Florida border Visitor's center where we get a drink of orange juice, Ginny considers it an inoculation against winter.
Within Florida we often avoid the two digit FL state highways preferring the three digit FL routes. Generally they only have local traffic, are in great condition and often almost totally without lights
, at least on roads around us here.
Our top driving time is typically four hours or less (150 miles).