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From: cem@intelca.UUCP (Chuck McManis)
Newsgroups: net.auto,net.analog
Subject: Re: Re: Spoofing traffic signals
Message-ID: <45@intelca.UUCP>
Date: Thu, 15-May-86 14:55:55 EDT
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Posted: Thu May 15 14:55:55 1986
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> 
> Photovoltaic cells sometimes react when you "flash your brights" 
> on an upcoming traffic signal so equipped.  Deserted intersections
> at twilight provide the best conditions for this phenomenon.
> James Wadas @ AT&T Bell Laboratories -- Naperville, Illinois

Yes and some have photovoltaics "tuned" to the stroboscopic frequency
of emergency vehicles. This allows the light in front of a fire truck
to change for it, thus speeding up response time.

--Chuck
-- 
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