"checks for bald tires on the fly." right.
"Now, after perfecting illuminated markers that are embedded in the
road surface to guide motorists through bad weather or warn of
dangerous conditions, Mr. Dicks's company, Astucia Traffic Management
Systems, is going a step further. Its latest creation is an embedded
stud equipped with a camera that catches speeders, monitors traffic for
criminals or stolen cars and even checks for bald tires on the fly."
http://www.nytimes.com/2004/05/13/technology/circuits/13next.html?
ex99780800&enlb5d80cccb81552&eiP07&partner=USERLAND