Traffic signal control method
Traffic signal control system employing universal...
Traffic signal device with interchangeable lamps
Traffic signal directional indicator device
Traffic signal failure notification system
Traffic signal light control for emergency vehicles
Traffic signal light having ambient light detection
Traffic signal light of enhanced visibility
Traffic signal operation during power outages
Traffic signal system and method
Traffic signal transfer switch
Traffic signal transfer switch with housing constructions
Traffic signal transfer switch with interlock constructions
Traffic signal using light-emitting diodes
Traffic signal with adjustable cycles
Traffic signal with visible indication in a direction other than
Traffic signaling device having sequentially controlled light ba
Traffic signalling system
Traffic stop sign safety enhancement system
Traffic synchronization device