The document describes Seoul Metropolitan Rapid Transit's (SMRT) integrated subway monitoring system. It details two main components: 1) The Tunnel Monitoring System (TMS) which uses cameras and sensors on trains to monitor tunnel infrastructure in real-time. TMS has increased fault detection by 200% and reduced infrastructure problems by 53%. 2) The new Technical Control Center integrates monitoring of subway operations, facilities, power systems, and other infrastructure across SMRT's four subway lines. The center allows for total monitoring and quicker response to issues compared to previous individual monitoring systems.