Rapid urbanization in major cities has significantly impacted urban transport systems and altered land use patterns, offering opportunities for spatial synergy and sustainable development. This study examines the Klang Valley, home to nearly eight million people, focusing on the impact of the Mass Rapid Transit (MRT) system on land use changes. The MRT Sungai Buloh–Kajang Line, constructed between 2011 and 2017, was designed to alleviate traffic congestion and promote sustainable urban mobility. Specifically, this research analyzes land use changes in Cheras, Kuala Lumpur, from 2010 to 2020 using Landsat 7 ETM+ satellite imagery and secondary data. We classify land use into four categories: built-up areas, forests, water bodies, open land, and recreational. Our findings indicate significant changes, with built-up areas increasing by 49.42%, open land and recreation decreasing by 30.88%, forests decreasing by 70.82%, and water bodies increasing by 183%. These findings illustrate how MRT construction has driven substantial land use changes, emphasizing the need for integrated geospatial solutions in urban planning. Additionally, this study focuses on the objective of sustainable cities and communities, by promoting sustainable urban mobility and efficient land utilization, thereby contributing to Sustainable Development Goal (SDG) 11. It underscores the importance of spatial synergy in developing smart cities and achieving sustainable development goals, highlighting the transformative role of urban rail transit in reshaping land use patterns.