Supplemental Notes:
The first part of the Record contains papers presented at a mid year meeting of the Committee on Transportation Data and Information Systems, held in Washington, DC, October 24-25, 1989. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved