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3. The International Transport Forum. Towards zero: ambitious road safety targets and the safe system approach. Paris: Organization for Economic Co-operation and Development Publishing; 2008. https://www.oecd-ilibrary.org/transport/towards-zero_9789282101964-en. Accessed 27 Mar 2020
4. The International Transport Forum. Zero road deaths and serious injuries: leading a paradigm shift to a safe system. Paris: Organization for Economic Co-operation and Development Publishing; 2016. http://www.towardszerofoundation.org/wp-content/uploads/2016/10/Zero_road_deaths-SafeSystems.pdf. Accessed 27 Mar 2020
5. Dumbaugh E, Signor K, Kumfer W, LaJeunesse S, Carter D, Merlin L. Safe systems: guiding principles and international applications. Report no CSCRS-R7. Chapel Hill: Collaborative Science Center for Road Safety; 2019. https://www.roadsafety.unc.edu/wp-content/uploads/2019/07/CSCRS_R3_Final-Report.pdf. Accessed 27 Mar 2020