NTUA Professor George Yannis has given an invited lecture at the National Transportation Center of the University of Maryland led by Prof. Lei Zhang, on “Traffic and safety data analysis: from correlation to causation and policy support“.  The Lecture focussed on the various facets of road safety data, starting from the need for evidence based road safety policies, followed by key road safety analysis methods, the challenges of road safety measures’ assessment and the role of road user behaviour and concluding with an integrated road safety approach from data monitoring and analysis to policy support.