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From: parnass@ihu1h.UUCP (Bob Parnass, AJ9S)
Newsgroups: net.auto,net.analog
Subject: Spoofing traffic signals
Message-ID: <840@ihu1h.UUCP>
Date: Fri, 9-May-86 22:53:16 EDT
Article-I.D.: ihu1h.840
Posted: Fri May  9 22:53:16 1986
Date-Received: Wed, 14-May-86 21:52:42 EDT
Distribution: net
Organization: AT&T Bell Laboratories
Lines: 16
Xref: watmath net.auto:10531 net.analog:823

x
		    Spoofing Traffic Lights

   Here's the scenario:

     I'm stopped at an intersection, waiting for  the  light
     to	 turn green. No	one else is around.  The light seems
     to	be red for an eternity,	but there's no traffic.

   I back my truck up a	few feet, off the sensor loop buried
   in  the  roadway,  then  drive  back	 over the loop a few
   times.  This	will usually cause  the	 traffic  signal  to
   become green.
-- 
===============================================================================
Bob Parnass,  Bell Telephone Laboratories - ihnp4!ihu1h!parnass - (312)979-5414