Selected papers of the Transport Research Arena Conference which took place in Paris in 2014 are now published by ISTE/Wiley. A special volume co-edited by NTUA Prof. George Yannis, and ENPC Prof. Simon Cohen is dedicated to Traffic Safety, containing theoretical chapters and practical case studies addressing topics such as road safety management and policies, accident analysis and modeling, vulnerable road users’ safety, road infrastructure safety, ITS and railway safety.