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2. AASHTO (2014). Highway Safety Manual, First Edition, 2014 Supplement, American Association of State and Highway Transportation Officials, Washington DC.
3. AustRoads, AustRoads Road Safety Engineering Toolkit (http://www.engtoolkit.com.au/).
4. Development of comprehensive accident models for two-lane rural highways using exposure, geometry, consistency and context variables;Cafiso;Accident Analysis and Prevention,2010
5. A crash-prediction model for road tunnels;Caliendo;Accident Analysis and Prevention,2013