Antonios Kontizas is a PhD candidate at the Department of Transportation Planning and Engineering at the School of Civil Engineering of the National Technical University of Athens (NTUA). He holds a Diploma in civil engineering (transport engineer). He is pursuing his Doctoral Thesis, entitled: “Investigation of Safety Margin with regard to Skidding and Dynamic Hydroplaning Risks of Two-Axle Vehicles on Motorways and Expressways” under the supervision of Associate Professor S. Mavromatis.