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From: skinner@saber.UUCP (Robert Skinner)
Newsgroups: net.cycle
Subject: Re: Smart Traffic Lights?
Message-ID: <1721@saber.UUCP>
Date: Wed, 31-Jul-85 12:23:51 EDT
Article-I.D.: saber.1721
Posted: Wed Jul 31 12:23:51 1985
Date-Received: Sat, 3-Aug-85 08:04:08 EDT
References: <658@ihu1g.UUCP> <2637@ihuxf.UUCP>
Distribution: net
Organization: Saber Technology, San Jose, CA
Lines: 46

> > All kinds of stuff about stupid smart lights.
> > 
> > Have other riders noticed this or are all the stupid lights just on
> > the roads I ride?  Any ideas on who to complain to or what can be
> > done?
> > 
> > 				Rick Schieve
> > 				...ihnp4!ihu1g!rls
> 
> 
> Does anyone know how these sensors work?  I had all ways assumed it was
> tripped by weight until a friend said he always thought they were 
> magneticly tripped.
> 
> 
> 				Mike Nelson
> 				ihuxf!cuda

I used to live in Austin, TX, where Eagle Signal (of traffic light fame) 
is located.  This is supposedly the straight poop from them via the local
rag:
	The smart signals are magneticly tripped.  The sensors are imbedded
	where the front most car should stop, and there may be more.  You
	can see them if you look closely and learn what to look for.  They
	are shaped like this:
				 /--\
				 |  |
				 |  |
				 \--/

	and are about the size of an economy car.  The trick is to place the
	maximum amount of metal directly over the sensor.  Obviously, you
	want to stop over the right or left side.  (You shouldn't be stopping
	right in the middle anyway, because there will be oil and grease 
	there.)  

I drive a 750, and this has worked well for me in TX and CA.  I get caught
only occasionally now.  Hope it works for you.

------------------------------------------------------------------------------

Name:	Robert Skinner
Mail:	Saber Technology, 2381 Bering Drive, San Jose, California 95131
AT&T:	(408) 945-0518, or 945-9600 (mesg. only)
UUCP:	...{decvax,ucbvax}!decwrl!saber!skinner
	...{amd,ihnp4,ittvax}!saber!skinner