This workshop explores a holistic approach to ego-exo sensing, integrating vehicle sensors, roadside cameras, aerial imagery, and V2V communications to advance transportation intelligence and drive progress toward smart mobility. We examine how ego-exo sensing networks enhance safety-critical scenario detection and generation, comprehensive environmental perception, cooperative driving, and multi-agent decision making, among other crucial tasks shaping the future of mobility. This workshop bridges siloed research efforts to create unified approaches for heterogeneous sensor fusion that will define next-generation mobility systems.