quote [ Is it a silly prank, a Pagan ritual, or a genius discovery about the next era of mass transit? In a picture posted by artist James Bridle, a car is sitting in the middle of a parking lot has been surrounded by a magic salt circle. In the language of road markings, the dotted white lines on the outside say, "Come On In," but the solid white line on the inside says, "Do Not Cross." To the car's built-in cameras, these are indomitable laws of magic: Petrificus Totalus for autonomous automobiles. ]