Affiliation: | (1) Institut für Stadtbauwesen Technische Hochschule Aachen, 51 Aachen, West Germany;(2) Graduate School of Management Northwestern University, 60201 Illinois, Evanston;(3) Transportation Institute North Carolina A&T State University, 27411 Greensboro, North Carolina;(4) Pennsylvania Research Center University Park, Pennsylvania;(5) Department of Planning and Transportation, Greater London Council, London, UK |