The paper examines the interrelated concepts of smart mobility, walkability, and tactical urbanism within the framework of sustainable urban planning, with a focus on the Viranşehir Neighborhood in Mersin, Turkey. As cities face increasing pressure to enhance livability while addressing environmental and social challenges, integrating data-driven mobility solutions and human-centered design has become imperative. Smart mobility, supported by digital technologies and shared transportation systems, aims to reduce congestion and promote sustainable transit. Walkability, as a key indicator of urban quality, emphasizes safe, accessible, and vibrant pedestrian environments. Tactical urbanism, through temporary and low-cost interventions, provides a strategic tool to test and implement spatial changes that support both walkability and smart mobility. In the case of Viranşehir, spatial analyses and field observations reveal that despite infrastructural efforts, the neighborhood still lacks cohesive pedestrian connectivity and public space integration. Tactical interventions, such as pedestrian-only zones and temporary market spaces, demonstrate potential for enhancing mobility and community interaction. The chapter concludes that integrating tactical urbanism into long-term urban strategies can foster more adaptable, inclusive, and resilient urban environments, offering valuable insights for transforming rapidly developing neighborhoods.