Feautures---traffic signals using light-emitting diodes (leds) as light sources instead of conventional incandescent light sources. ---leds, advanced semiconductor devices, have many benefits including direct color production, high brightness, reduced power consumption and ruggedness. ---they are now used in outdoor advertisements, variable message signs, turn signals, etc. also applied to traffic lights in order to improve visibility, save energy, and reduce maintenance crews and costs. * four-color vehicle signal* three-color vehicle signal* pedestrian signal* warning beacon
Feautures
---traffic signals using light-emitting diodes (leds) as light sources instead of convent