When we run out of space for billboards on our roads' sides, we'll embed jingles into the pavement.
GigDoggy: "A Japanese engineer by the name of Shizuo Shinoda was the first to come up with the brilliant idea of transforming roads into a playback medium. The system works by cutting thousands of little grooves in the asphalt that produce a sound when a vehicle drives over them. The grooves are a few millimeters deep and 6 to 12 millimeters wide, and the closer you bring them together the higher the pitch will be when driven over. Production cost is about $20 000. Mr Shinoda got the idea by driving his car over markings a bulldozer had previously scraped off a street and realized he was generating a series a tones."
Video below: music roads in Japan.
From WSJ (thank you, Robert): the making-of video of the Civic Musical Road in Lancaster, CA that played an overture from William Tell until nearby residents complained. It is now being rebuilt elsewhere.