Re: New High-Tech Traffic Lights

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Article #8410

#8410

From: Jim Davidson
Date: Mon, 04 Oct 1999 00:00

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bell88@hotbot.com (Shiva Nataraja) writes:

> Around here almost every major intersection has dedicated left turn
> lanes controlled by left turn only arrows - no left turn is allowed on
> the regular green. This is no doubt intended to reduce collisions from
> people turning left in front of oncoming traffic. 

Same in the Bay Area.

It's really quite convenient, once you get used to it.  I find I miss
the protected left turns when I drive in other areas.

> Unfortunately, the current decision algorithm has a "window of opportunity"
> that ENDS 15-20 seconds before the light changes.

This sounds wrong.  15-20 seconds is the typical duration of an entire phase.

Around here, the window of opportunity ends about one second before the light
changes, which is about what you'd expect.

-Jim

-- 
Jim Davidson
jdavidso at csi.com

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From: Jim Davidson <jdavidso@nospam.com>
Subject: Re: New High-Tech Traffic Lights
Date: 1999/10/04
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