INNOVATIVE TRACK INFRASTRUCTURE SOLUTIONS FOR SUSTAINABLE RAILWAY TRANSPORTATION

The increasing demands for sustainable and resilient transportation systems necessities transformative innovations in railway infrastructure design and materials. This study explores the integration of recycled composite sleepers and geogrid-reinforced subgrades as a solution to enhance the mechanical performance, durability, and environmental sustainability of railway tracks. A 100-meter full-scale experimental track was constructed and instrumented to validate the performance of the proposed system under realistic operating conditions. The research employs finite element analysis (FEA) and full-scale field trials to evaluate the structural behavior of these materials under varying axle loads, dynamic train frequencies, and extreme climatic conditions. Key performance metrics such as track settlement, lateral stability, and maintenance intervals are analyzed, demonstrating that geogrid-reinforced subgrades reduce track deformation by up to 40% over 12 months compared to conventional designs. Recycled composite sleepers exhibit superior resistance to cracking, moisture ingress, and UV degradation, resulting in a25% reduction in lifecycle maintenance costs and a 30% decrease in carbon emissions. The lifecycle assessment (LCA) confirms that the proposed infrastructure solutions significantly lower resource consumption and greenhouse gas emissions. This research contributes to the circular economy, aligns with global sustainable development goals, and offers practical strategies for transitioning to green rail infrastructure. This finding provides a comprehensive framework for implementing sustainable materials in railway infrastructure, addressing contemporary challenges in transportation engineering while ensuring long-term operational efficiency and environmental stewardship. Keywords: Geogrid reinforcement, life cycle assessment, recycled composites, railway