The Transcontinental Airway System – https://en.wikipedia.org/wiki/Transcontinental_Airway_System https://en.wikipedia.org/wiki/Transcontinental_Airway_System

The Transcontinental Airway System – https://en.wikipedia.org/wiki/Transcontinental_Airway_System https://en.wikipedia.org/wiki/Transcontinental_Airway_System There were large concrete arrows painted yellow every 15-20 miles and towers with flashing lights for night time. This was the 1920s so there weren't so many lights in rural areas. The arrow shown in the wikipedia article looks a little rough to access, but the one at 37.0648086,-113.5952549 is an easy walk from the back of a suburban neighborhood. And I mean, what else are you going to do to break up a drive through southern Utah?