Mr. Dimitrios Troullinos, a PhD student supervised by Prof. Markos Papageorgiou and Prof. Georgios Chalkiadakis, member of DSSL and contributor to TrafficFluid, accomplished successfully his PhD thesis defense on 18 September 2024. The jury comprised an external member (Prof. Alessandro Farinelli - University of Verona), as well as Profs. Markos Papageorgiou, Ioannis Papamichail, Georgios Chalkiadakis, Lefteris Doitsidis, Vasilis Samoladas, Michail Lagoudakis. The PhD thesis is entitled "Multiagent decision making for lane-free traffic ". We congratulate Dr. Troullinos on this achievement!