Why would the wire help you? If you needed precise location information, couldn't the company just add some markers throughout the city? Either stamp large QR c

Why would the wire help you? If you needed precise location information, couldn't the company just add some markers throughout the city? Either stamp large QR codes on corners and traffic lights, or put thousands of Wi-Fi routers around the town, that would help the vehicle triangulate... The latter doesn't even require permission, just money!