A new idea coming out of Japan – roads which can play sounds or messages when you drive over them.

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.”