Stephen Marshall is Senior Lecturer at the Bartlett School of Planning, UCL. He has 20 years' experience in transport, planning and urban design -- five years in consultancy and fifteen in academia. This experience includes work on several EC and UK research council projects, as well as research for UK and Scottish government level projects and work for local authorities and private clients in Scotland and London. He is currently director of the PhD programme at the Bartlett School of Planning, where he also teaches on urban design, urban form and transport courses. Dr Marshall's principal research interests are in urban form and urban structure, and how these relate to urban design and planning. This interest encompasses topics such as streets and transport networks; urban morphology and evolution; and the use of codes for generating urban structure. Dr Marshall is Chair of the Editorial Board of Urban Design and Planning, part of the Proceedings of the Institution of Civil Engineers journal series, and an editorial board member for Built Environment journal. His books include Streets and Patterns (2005), Land Use and Transport (edited with David Banister, 2007) and Cities Design and Evolution (2009).