V.A. Profillidis is Professor of Transportation Engineering at Democritus Thrace University, Xanthi, Greece. He has acted as a consultant on many railway projects, with 30 years of research, teaching, and professional experience in Railway Planning, Management, and Engineering. He has published 10 books and over 200 papers in scientific journals and conference proceedings. He has served as advisor to the Greek Ministry of Transport, the Greek Railways, and the Greek Ministry of Public Works. He has also been a research associate in the Research Department of the International Union of Railways (UIC) and in the French Railways (SNCF). He holds a Diploma in Civil Engineering, a Diploma in Law, both from Aristotle University of Thessaloniki, a D.E.A. and a Ph.D. from Ecole Nationale des Ponts et Chaussées of Paris, France.