• Jun 18, 2010
The Uni-Signal traffic light – Click above for high-res image gallery

The Uni-Signal is aimed at helping those who are red-green colorblind to have an easier time with traffic signals. Instead of using circles for all three lights, the red light gets a triangle, the yellow light remains circular, while the green light goes square. There's no mention of the colors of the lights being changed, but the shape identification could make for quicker comprehension among those who have a hard time with such things. Have another look at the Uni-Signal in the gallery of photos below.



[Source: Yanko Design]


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    • 1 Second Ago
  • 96 Comments
      • 4 Years Ago
      I agree with RS4Jay, perhaps the green light should be the one with the triangle shape because it looks like an arrow.

      @Joshua King:

      Not all traffic lights have red on top. I know of one in Syracuse, NY (in a heavily Irish neighborhood) that has the green light on top. Being slightly colorblind myself, I have run that light more than once.
      • 4 Years Ago
      Nice.
      • 4 Years Ago
      Unfortunately, the design is fundamentally flawed as the triangle shape is related to "yield." An octagon would have been a better choice as its the universal shape for "stop."
      • 4 Years Ago
      I think the shapes would be too hard to recognize at a distance. While this might be an improvement, I think a better improvement would be an in-car system which would show and/or tell you what color the light is. Maybe a radio-based transmitter on the stoplight and a receiver in each car. Such a system could also be used to increase efficiency in cars by telling start-stop engine systems when they should stop and start up!
      • 4 Years Ago
      shouldn't the red be an octagon?
      • 4 Years Ago
      ha, simultaneous octagon fans...
        • 4 Years Ago
        As a red/green colorblind driver this is revolutionary. I have encountered many faded green lights that look yellow and visa versa. I would say most r/g colorblind have more problem with yellow/green than say green/red or yellow/read. Changing shapes is great but encircling the red light with flashing white light works even better. Changing out these lights is going to be expensive though, who is going to pay for it?
        • 4 Years Ago
        that red triangle adds a bit of unnecessary confusion in my opinion. the shape is too indicative of a lighted lane arrow or go (with caution) indicator.

        green lights can have either a blue or yellow bias, and yes sometimes red looks green or visa versa at first... it can take a moment to focus correctly on the color when the brain is saying one thing while the eyes are saying something else.

        and yeah, in my town pot holes are going unfilled, street lights turned off, and police employees reduced...these lights might be an ok idea somewhere, but not in my budget hemorrhaging town.

        and as an aside...in earlier years in certain military functions color blindness was a plus.... as in photo map interpretation.
      • 4 Years Ago
      How about left/right turn green/red arrows?
      • 4 Years Ago
      Last time I drove in Virginia, I saw an inordinate number of traffic signals with a xenon strobe in the red lantern. When the signal was red, the strobe flashed about once every 2 seconds. I assumed this was for colorblind people, and makes a lot of sense to me.
        • 4 Years Ago
        I noticed those too when I took a trip up north a few months ago. I would have to guess that is for us colorblind people as well. Personally I thought it was a great idea, because even if you are not colorblind, a flashing light is more likely to grab your attention if you are not paying 100% attention to the road.
      • 4 Years Ago
      because it's hard to remember that red is on top, yellow is in the middle and green is on bottom?

      I don't get it, am I missing something?
        • 4 Years Ago
        ah, great point. I didn't think about night time. Far away at night would indeed be difficult to tell the position.
        • 4 Years Ago
        I'm red-green (and some yellow) colorblind, and this can be an issue at night determining whether a light is flashing red or yellow. Heavy snow can make it hard to tell the position too.
      • 4 Years Ago
      interesting, but not sure if its needed
      • 4 Years Ago
      Something needs to be done about traffic signals, period. People spend too much of their lives at red lights. Their needs to be some sort of yield system, like a total revamp of the intersection or something. Redlights=wasted energy and more importantly, time.
        • 4 Years Ago
        I'd suggest traffic circles, but they seem to cause brain hemorrhages among my fellow Americans so they're either not the answer, or it would take a few generations for people to learn how they work.
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