Re: Traffic - Signal Devices Threaten Chaos

In article <[EMAIL PROTECTED]>,
Carey Gregory  <[EMAIL PROTECTED]> wrote:
>
>The systems don't use infrared.  The signal is a flashing white strobe set
>at a specific frequency.  It would be blatantly obvious if someone was using
>one.

Many light sensors -- including the chips found in digital cameras -- are
sensitive to near infrared.  Remember the Sony video recorder that could
see through clothes?  That was a visual band camera responding to infrared.