Phoenix faces a series of interconnected urban challenges shaped by heat, dispersed development, automobile dependency, and fragmented public space. Existing urban conditions often isolate residential communities from services, mobility infrastructures, and environmental amenities while intensifying exposure to extreme temperatures across the public realm. The project responds through a multi-scalar strategy that combines compact mixed-use development with landscape and mobility infrastructures. Empty lots are reorganized into a series of interconnected clusters that balance density with open space, integrating housing, commercial programs, shaded pedestrian corridors, and autonomous transit systems within a continuous urban framework. Environmental analysis informed the orientation, massing, and spatial organization of the proposal, examining solar exposure, wind patterns, walkability, and thermal comfort across different scales. The project seeks to reduce heat accumulation while promoting social interaction, accessibility, and everyday public life through shaded streets, planted corridors, green roofs, and integrated open-space systems. Rather than treating mobility and climate adaptation as separate systems, O.A.S.I.S. merges them into a unified urban strategy capable of supporting more resilient and socially connected forms of inhabitation.