-----Original Message-----
From: Gabriel Gonzalez <tgo@CHIH1.TELMEX.NET.MX>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: Friday, July 30, 1999 3:32 AM
Subject: Re: Traffic Lights (Was Car LED lighting etc ...)


>I believe they already are AI controlled, or then how would you explain
>that, when it's green and you're about to arrive at the intersection it
>changes to red before you can cross it, especially when you're going fast!


I have seen a set of smaller loops embedded in the roadway several hundred
feet before the stop light.  I figure they are either checking for advancing
traffic or possibly backed up traffic if the line should reach back that
far.