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Basil Jet[_4_] · September 21st 14, 07:29 AM posted to uk.transport.london

On 2014\09\20 21:06, wrote:
On Sat, 20 Sep 2014 19:00:20 +0100, Basil Jet
wrote:

On 2014\09\20 09:46, wrote:

At one time at night if you saw a white blind approaching it would be
a normal bus, if you saw a yellow one it was a Greenline service.
Despite catching one regulary with my Gran she always said "how did
you know it was that one coming in the distance" she never seemed to
notice the different colour.

Old people's colour vision can diminish.

True , but at the time she would have just been in her early 60's .
many people don't regard that as very old and she was still generally
fit and still working.
A lot of people don't regard people as getting old till in their late
60's ,those who set the entitlement age for a state pension for
example.
Fully accept though that you can have healthy fit 70 year old people
but some people get decrepit much earlier.

None of that pertains to deterioration of colour vision.