PB Network ©2004

Parsons Brinckerhoff Inc., One Penn Plaza, New York, NY 10119, 1-212-465-5000. All rights reserved. Articles may be reprinted only with permission from the Executive Editor. This journal is intended to foster the free flow of ideas and information among PB staff. The opinions expressed by the writers are their own and are not necessarily those of Parsons Brinckerhoff.

Past issues of PB Network starting from 1995 are available electronically on PB's web site http://www.pbworld.com, under the button "NEWS + EVENTS >PB Publications > PB Network," or go directly to http://www.pbworld.com/news_events/publications/network/. All recent issues are available in pdf with recent issues available in reader-friendly html format.

Past issues are also available to PBemployees via the PBIntranet, http://www.pbworldnet.com. Go to PBNews > PBPublications > PBNetwork > View All Issues Here. Past issues are also available (in pdf format) to PBemployees via PB's Outlook public folders, under PBPublications & News/PBNetwork.

PB employees can request additional printed copies to use for conferences, seminars and proposals by contacting Janet Rose in New York (1-212-465-5107, rosej@pbworld.com).

Executive Editor: John Chow, Advanced Technology, New York, New York, chow@pbworld.com

Editor: Lorraine Anderson, Office of Professional Practice, New York, New York

Associate Editors: Gordon Clark, Seattle, Washington; Brian Brenner; Willa Garnick, Office of Professional Practice, New York, New York

Assistant Editors: Cade Hobbick, New York, New York; Tracy Nixon, Dublin, Ohio

Graphic Designer: Laurie Ludwin, Graphic Services Group, New York, New York

Web Designer: Steven Cipolloni, Princeton, New Jersey

Column Coordinators: David Trainer, Sydney, Australia, “Computer Tutor”; Gordon Clark, Seattle, Washington , “The Net View”

Guest Technical Reviewers for This Issue: Julie Hoover, New York, New York; Suzanne Johnson Crocker, St. Louis, Missouri; Hal Kassoff, Washington, D.C.; Susannah Kerr Adler, Herndon, Virginia; Peter Kydd, Bristol, UK; Vince Lepardo, Houston, Texas; Greg Milford, Rhodes, Australia

Advisors: Judy Cooper, New York, New York; Paul Gilbert, Seattle, Washington; Marcia Earle, New York, New York; Emil Cheung, Hong Kong; Chin Hwi Gan, Singapore; St. John Herbert, Brisbane, Australia; Alan Knott, Merseyside, U.K.