On 16/03/2018 17:00, Chris Green wrote:
I agree, I hadn't even realised until recently that there were two
different levels called yellow and amber. Traffic light middle light
is called both yellow and amber so one would assume they're the same.
Traditionally railways use yellow, and roads amber, for the name of the
Surely red, orange, yellow would be more obvious.
And if you happen to be red-green colour blind, like about 10% of men,
they're near as dammit identical. Which is why red is _always_ at the top.