Clyde Smith-Stubbs writes:
>How do people with impaired colour vision deal with that?
>Or aren't they allowed to drive in Russia?

        The design sounds clever, but one of the things that are
frequently done around here is to connect a sounder across the "Walk"
signal so that pedestrians who are blind can hear a positive signal
that tells them when to walk.  It is true that one can listen to the
traffic, but that gets complicated with left-turn arrows and periods
of time when there may not be a car in the intersection to listen to.

        One would hope that the designers of the LED heads would build
the sounders in  to the system or at least put a terminal on the
controller board that changes state when the Walk signal is active.

        I also bet that the eye only has red and green LED's in it and
that amber is made by pulsing red and green very fast.  Sounds like a
perfect PIC application.

Martin McCormick WB5AGZ  Stillwater, OK
OSU Center for Computing and Information Services Data Communications Group