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