Can trains predict their own failures? Can quantum sensors replace GPS in metros and tunnels? In this episode of the Prof Mahesh Podcast, we dive into the cutting edge of railway technology—where AI, quantum physics, and high-speed engineering are transforming how we travel. From predictive maintenance that lets trains “ask for help” before breakdowns, to quantum sensors guiding trains through GPS blackspots, this conversation bridges the gap between academic research and real-world infrastructure.Learn why physics gets complicated above 300 km/h, how engineers keep bullet trains safe at extreme speeds, and why scaling innovation across legacy rail systems remains a global challenge.Key insights: smarter, autonomous, and high-speed railways; quantum sensing; predictive maintenance; and the future of sustainable transport.