Passive pavement-mounted acoustical linguistic drive alert...
Pavement ice detector
Personal communication and positioning system
Personal communication and positioning system
Personal communication and positioning system
Personal communication and positioning system
Personalized traveler information dissemination system
Phase sensitive guidance sensor for wire-following vehicles
Portable traffic congestion radio
Process and system for ascertaining traffic conditions using sta
Process for transmitting information between moving bodies...
Providing sponsorship information alongside traffic messages
Providing sponsorship information alongside traffic messages