Temporary Speed Restriction (TSR) system consists of a wayside cabinet and balise. The cabinet verifies incoming warning signals and activates the balise to send automatic train protection commands, forcing deceleration or braking. A handshake-based safety mechanism cross-checks signals from the Disaster Warning System, Centralized Traffic Control, and AI video surveillance to ensure accuracy and reliability.

TSR system features an integrated event recorder that continuously captures train data with real-time backups, ensuring no data loss. Coupled with an uninterruptible power supply, it provides power redundancy and stable quality, preventing interference and equipment damage. Time-sequenced recording allows precise tracing, comparison, and analysis of all events, enhancing safety and operational reliability.

On April 2, 2021, Taiwan Railways’ Taroko train No. 408 derailed after hitting a construction vehicle on the tracks, causing heavy casualties and highlighting railway safety risks. In response, Taiwan Railway and NKUST’s Railway Technology Research Center developed the nation’s first indigenous Temporary Speed Restriction (TSR) system. Now deployed on 20 high-risk sections, TSR monitors track anomalies in real time, alerts drivers and control centers, and enables prompt countermeasures, significantly reducing collision risks and enhancing railway safety.