John Whitelegg is visiting Professor of Sustainable Transport at Liverpool John Moores University and Professor of Sustainable Development at York University's Stockholm Environment Institute. From 1990 to 1993 Dr. Whitelegg was Head of Department of Geography at Lancaster University and Director of the University's Environmental Epidemiology Research Unit. He has written books and over 50 papers, including Transport for a Sustainable Society: the Case for Europe (John Wiley, 1993) and Critical Mass: Transport, Environment and Society in the 21st Century (Pluto Press, 1996), and is founder and editor of the Journal of World Transport Policy & Practice.