On Tue, 18 Dec 2018 21:54:42 -0000, Rod Speed wrote:



"William Gothberg" "William wrote in message
news
On Mon, 17 Dec 2018 02:18:53 -0000, Rod Speed
wrote:



"Kristy Ogilvie" wrote in message
news On Sun, 16 Dec 2018 15:00:21 -0000, Max Demian
wrote:

On 16/12/2018 13:33, Kristy Ogilvie wrote:
On Sun, 16 Dec 2018 12:37:49 -0000, newshound
wrote:

On 14/12/2018 18:22, Fred Johnson wrote:
People with colour blindness shouldn't drive trains (or cars for
that
matter).

And it's not very many, in fact I know of only one person who's
colourblind.

You may not know *of* many but I bet you know quite a lot. It's about
8%
of men, although many of them do not realise that, or discover it
until
tested later in life.

I think you'd notice when you saw all the traffic light bulbs looking
identical. You're not safe to drive if you can't tell red from green.

I suspect they don't look *identical*, just not as distinct as to
someone with normal colour vision. They would use the position to
confirm which is which.

The only colour blind person I know says red and green look IDENTICAL
(presumably in his eyes the red and green receptors are shorted together
somehow). They're only different if one is lighter than the other, but
then light green and light red are the same, and dark red and dark green
are the same, so that might depend on the traffic light design and the
position of the sun.

Interesting. According to wikipedia, some forms of color
blindness cant see red at all so that they can't even see that
the red light on a traffic light is lit, it looks like its not lit.
Tho they can see green fine, so all they have to do is
know that if no lights are visible, it must be showing red.

That's no good, because you're very likely not to notice the traffic light
is there at all.

They stand out like dogs balls and you can usually
see the set of lights for the cross road too.

They're black, and blend in with all the other ****e the councils put up. I see no reason to look for anything other than lights.

If I drive past traffic lights that are not operating (say ones still
being set up for roadworks), I don't see them at all. I'm only looking
for lit lights, as unlit ones are of no consequence.

But you would normally see a whole set of lights.
normally 4 for your road and you can usually see
at least two for the cross road too.

If they're all red and I can't see red, I see no lights.

And that Romania does in fact ban the color blind from
driving. But the color blind are trying to get that overturned.

It would be interesting to see if the number of accidents changes if they
did that.

Unlikely to change much given that its only about 1% of males
that are completely green/red color blind. The one that is 6%
of males aren't completely green/red color blind, they are just
much less sensitive to green than normal people so that in
reduced light situations dark green cars appear to be black.
But traffic lights are bright green, not dark green, and bright.
https://en.wikipedia.org/wiki/Color_...olor_blindness

Then why not just make the 1% banned from driving?