The American highway is still one of the best places get a feel for the country’s cultural pulse. I recently drove from Chicago to Minneapolis and back, and on my way up Interstate 94 through the pastoral rolling hills of rural Wisconsin, I made a couple of stops that revealed some significant advancements in grab-and-go roadside food fare.
One of the most compelling was the incredibly crowded bar scene—the nutrition bar scene, that is—the avalanche of nutrition bars available at truck stops once…