Page ii

    NATIONAL ACADEMY PRESS 2101 Constitution Avenue, N.W. Washington, D.C. 20418

    NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The members of the committee responsible for the report were chosen for their special competencies and with regard for appropriate balance.

    This study was funded by the U.S. Department of Housing and Urban Development, Contract Number C-OPC-21756. All opinions, findings, conclusions, and recommendations expressed herein are those of the National Research Council and do not necessarily reflect the views of the Department of Housing and Urban Development.

    Library of Congress Cataloging-in-Publication Data

    International Standard Book Number 0-309-07336-7

    Copyright 2000 by the National Academy of Sciences. All rights reserved.

    Available from:

    Board on Infrastructure and the Constructed Environment

    National Research Council

    2101 Constitution Avenue, NW

    Washington, DC, 20418

    Printed in the United States of America.

The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement