The billboard serves as the Deliverator's polestar. He knows that when he gets to the place on CSV-5 where the bottom corner of the billboard is obscured by the pseudo-Gothic stained-glass arches of the local Reverend Wayne's Pearly Gates franchise, it's time for him to get over into the right lanes where the retards and the bimbo boxes poke along, random, indecisive, looking at each passing franchise's driveway like they don't know if it's a promise or a threat.