Exterior mounted shield for vehicle mounted toll collection...
External indicator for electronic toll communications
Fail-safe stop light apparatus
Fault detection for traffic light systems using electronic...
Fiber optic traffic signal light system having a shutter control
Fiber optic traffic signal light system having a shutter control
Fire and smoke detection and control system
Flashing beacon
Flashing warning light for a traffic control device
Gate apparatus, on-board unit, setup method of the on-board...
Geographic information service apparatus and method using a...
Geographical information supply system and method using...
Goal-driven inference engine for traffic intersection...
GPS-based traffic control preemption system
Guide beacon
Hazard warning device, particularly for highway use
Highway barrier for traffic control
Highway intersection hazard warnings and traffic control...
Highway warning system
Hybrid power management system and method