This study examines the Addis Ababa City Corridor Project as an urban-scale corridor development initiative in the Global South. Using a mixed-methods approach that combines spatial analysis, on-site interviews, and LLM-supported social media analysis, it investigates how corridor-led redevelopment reshapes urban space, affects residents and businesses, and is perceived by the public. The findings show that the project produces visible improvements in streetscape quality, mobility infrastructure, greenery, and city image, but also generates uneven social costs. Central areas such as Piazza and Kazanchis experienced demolition, clearance, and heritage or livelihood disruption, while peripheral relocation areas such as Ayat-Tafo offer weaker access to jobs, services, and social networks. Social media discourse is dominated by governance, accountability, and urban design, with anxiety concentrated around displacement, compensation, and environmental risk. The study argues for more transparent, participatory, and socially protective corridor planning.