Systems and methods are described for passive pavement-mounted acoustical alert of the occupants of a vehicle. A method of notifying a vehicle occupant includes providing a driving medium upon which a vehicle is to be driven; and texturing a portion of the driving medium such that the textured portion...http://www.google.fr/patents/US6259374?utm_source=gb-gplus-shareBrevet US6259374 - Passive pavement-mounted acoustical linguistic drive alert system and method
Passive pavement-mounted acoustical linguistic drive alert system and method
