The International Transport Forum (ITF/OECD) published the Research Report on Sharing Road Safety. This Report is the result of a three-year co-operative effort by an international group of experts representing 17 countries, with contribution from NTUA Associate Professor George Yannis. The purpose of this report is to emphasize the importance of sharing knowledge on the effectiveness of interventions and transferring of results internationally. Road safety policy is increasingly dependent on sound indicators of the effectiveness of interventions. Policy makers need not only to justify expenditure on safety in terms of effectiveness but to argue convincingly for measures in the face of sceptical and sometimes hostile lobbies. Monitoring and analysis of effectiveness is not without cost, and indicators that relate safety improvements to interventions, “Crash Modification Functions”, that are transferable from one situation to another are a valuable tool in spreading effective safety policies.