Mil­i­tary Load Class signs near bridges show you're in the west. And the yel­low signs against a blue sky add some kind of Amer­i­can feel to it. But at the mo­ment I can't find the piece of art con­sist­ing of thou­sands of reg­u­lar pho­tos mak­ing up an avant-la-let­tre gi­gapix­el pho­to of a traf­fic sign in the desert.