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Traffic lights use Red Amber Green because Red has always been associated with danger and green with safety. The amber is an interim light, only used to indicate to an approaching vehicle operator whether the next change will be to Red (amber on its own UK, US) so the vehicle can slow down, or to Green (Red and Amber together UK) so the appropriate approach speed can be maintained.
What else can I help you with?
How many traffic lights are there on earth?
3 - green, yellow, red
Did traffic lights change. i seem to remember them being green on top and red on the bottom.?
The lights are still in this order: RED YELLOW GREEN
What are the lights in a traffic light?
Red, yellow, and green. Green means go. Red means stop and yellow means slow down.
What color will appear if you add green light to red and blue lights?
yellow-green
What color are traffic lights from top to bottom?
red yellow green
What color are trafic lights from top to bottom?
red, yellow,and Green!
What are the green lights on light poles?
Green means go, yellow slow, red stop.
Some cheats for PS2 aerosmith?
Green + Red, Blue, Green + Red, Green + Yellow, Blue, Green + Yellow,Red + Yellow, Orange, Red + Yellow, Green + Yellow, Yellow, Green +Yellow, Green + RedAir Guitar (Guitar is invisible)Blue + Yellow, Green + Yellow, Green + Yellow, Red + Blue, Red + Blue,Red + Yellow, Red + Yellow, Blue + Yellow, Green + Yellow, Green +Yellow, Red + Blue, Red + Blue, Red + Yellow, Red + Yellow, Green +Yellow, Green + Yellow, Red + Yellow, Red + YellowHyperspeedOrange, Blue, Orange, Yellow, Orange, Blue, Orange, YellowPerformance ModeRed + Yellow, Red + Blue, Red + Orange, Red + Blue, Red + Yellow, Green+ Blue, Red + Yellow, Red + BlueEasy Expert (gives you more time to hit notes)Green + Red, Green + Yellow, Yellow + Blue, Red + Blue, Blue + Orange,Yellow + Orange, Red + Yellow, Red + Blue**Precision Mode (gives you less time to hit notes)Green + Red, Green + Red, Green + Red, Red + Yellow, Red + Yellow, Red +Blue, Red + Blue, Yellow + Blue, Yellow + Orange, Yellow + Orange, Green+ Red, Green + Red, Green + Red, Red + Yellow, Red + Yellow, Red + Blue,Red + Blue, Yellow + Blue, Yellow + Orange, Yellow + OrangeLarge GemsGreen, Red, Green, Yellow, Green, Blue, Green, Orage, Green, Blue,Green, Yellow, Green, Red, Green, Green + Red, Red + Yellow, Green +Red, Yellow + Blue, Green + Red, Blue + Orange, Green + Red, Yellow +Blue, Green + Red, Red + Yellow, Green + Red, Green + YellowUnlock All SongsYellow + Orange, Red + Blue, Red + Orange, Green + Blue, Red + Yellow,Yellow + Orange, Red + Yellow, Red + Blue, Green + Yellow, Green +Yellow, Yellow + Blue, Yellow + Blue, Yellow + Orange, Yellow + Orange,Yellow + Blue, Yellow, Red, Red + Yellow, Red, Yellow, OrangeUnlock EverythingGreen + Red + Blue + Orange, Green + Red + Yellow + Blue, Green + Red +Yellow + Orange, Green + Yellow + Blue + Orange, Green + Red + Yellow +Blue, Red + Yellow + Blue + Orange, Green + Red + Yellow + Blue, Green +Yellow + Blue + Orange, Green + Red + Yellow + Blue, Green + Red +Yellow + Orange, Green + Red + Yellow + Orange, Green + Red + Yellow +Blue, Green + Red + Yellow + Orange
What comes after green and then what in a traffic light?
Yellow, then red is the patterns of the traffic lights.
What color is perceived when red and green lights are mixed?
Orange/yellow I believe.
What cheats are there on Guitar Hero world tour?
Aaron Blue, Red, Yellow, Yellow, Yellow, Yellow, Yellow, Green. Air Instruments Red, Red, Blue, Yellow, Green, Green, Green, Yellow. Always Slide Green, Green, Red, Red, Yellow, Red, Yellow, Blue. AT&T Ballpark Yellow, Green, Red, Red, Green, Blue, Red, Yellow. Auto Kick Yellow, Green, Red, Blue, Blue, Blue, Blue, Red. Best Buy Kid (Nick) Green, Red, Blue, Green, Red, Blue, Blue, Green. Euro Contest Winner (Johnny Viper) Blue, Red, Blue, Blue, Yellow, Yellow, Yellow, Green. Flame Color Green, Red, Green, Blue, Red, Red, Yellow, Blue. Gem Color Blue, Red, Red, Green, Red, Green, Red, Yellow. Hyperspeed Green, Blue, Red, Yellow, Yellow, Red, Green, Green. Invisible Characters Green, Red, Yellow, Yellow, Yellow, Blue, Blue, Green. Line 6 Green, Red, Yellow, Blue, Red, Yellow, Blue, Green. Performance Mode Yellow, Yellow, Blue, Red, Blue, Green, Red, Red. Quickplay Blue, Blue, Red, Green, Green, Blue, Blue, Yellow. Rina Blue, Red, Green, Green, Yellow, Yellow, Yellow, Green. Star Color Red, Red, Yellow, Red, Blue, Red, Red, Blue. Vocal Fireball Red, Green, Green, Yellow, Blue, Green, Yellow, Green.
I found out the human retina can't see yellow Why is this?
The cone receptors in the eye respond to red, green and blue. When you perceive something as yellow, it is really high intensity red and green lights with low intensity blue lights.
