Color-coded systems are also frustrating, which is why color should always supplement some other system whenever possible. It's not always possible and sometimes color just makes sense. Airports are marked with rotating green lights. Ships mark their port and starboard sides using colored lights. And of course, the question I get most often, we have red and green traffic lights. So how can I see those? I don't know, I didn't make my eyes, but I do know that I can pass the vision test at the RMV and that I've never caused a wreck and I've been driving for 19 years.
It is extremely difficult for me to drive at night because stale green traffic lights look exactly like sodium vapor street lamps and oncoming vehicle headlamps. Local roads at night are most frustrating. If I have to drive at night, I prefer controlled access roads. But then again, I just avoid driving long distances at night.
I dislike those high intensity discharge headlamps that BMW and other manufacturers started using. I also dislike it when people remove tail light lenses and replace them with clear lenses. You start making everything look the same. At least give me a fighting chance!
Colour Blindness Simulator
Upload a JPEG image not larger than 100k and 1000x1000 or lower in resolution and it can convert it to provide a reasonable demonstration for protanopia, dueteranopia, or tritanopia. I tested it using a recent picture of our daughter.
How I See It
And there it is. I asked Karen to look at it and see if it looked different. She said it did, so hopefully I saved the right images here because they look the same to me.