Most Americans haven’t heard the name Virgil “Bus” Carrell. But drive across the country and you’ll see Carrell’s work. And if you’ve entered a national forest, driven to a natural monument, or crossed the Continental Divide, you’ve probably even pulled over and snapped a selfie next to one of his creations. Those quirky brown-and-cream trapezoids, with the retro typeface that welcomes you to a U.S. Forest Service-managed site, are his legacy. Over the last half-century, those signs have become not only instantly recognizable, but iconic. “Whoever designed these signs really…
