The Department of Transportation Planning and Engineering of NTUA organized with great success a Workshop titled “Emerging Challenges in Road Geometric Design” which was held on 7 May 2026 in Athens, Greece. This Workshop explored emerging challenges in road geometric design in the context of rapidly evolving mobility systems and user needs. It brought together insights from three complementary perspectives: the integration of lane support systems supported by machine learning, international experience with turbo roundabouts based on Polish practice, and innovative approaches from Japan addressing pedestrian–vehicle coexistence.