Rail Transportation Services

"Leading the Digital Transformation of Railway Safety and Efficiency"

S-Traffic provides integrated signaling solutions that harmonize on-board, ground, communication, and control systems. Aligned with Vision 2030, we deliver a total railway ecosystem that maximizes operational safety and efficiency through world-class signaling and communication technologies.

Our Core Values

  • Safety: SIL-certified design for uncompromising protection.
  • Reliability: Robust fail-safe architecture to ensure continuous operation.
  • Efficiency: Optimization of train intervals to maximize network capacity.
  • Interoperability: Seamless alignment with both domestic and international standards.

Solution Portfolio

STraffic’s railway transportation business is leading the digital transformation and advancement of safety in the domestic railway signaling sector.

Its proprietary Korean Communication-Based Train Control (CBTC) system, ST-KMS (STraffic KTCS-M eXtended), is a core solution designed for the advanced operation of urban railways. The system features independently developed hardware and software across both onboard and wayside components. In addition, ST-KMS has achieved SIL4, the highest level of safety integrity certification in Korea, ensuring exceptional system safety and reliability.

STraffic’s railway signaling technologies optimize headways between trains while enhancing real-time control and incident response capabilities, thereby simultaneously improving the safety and operational efficiency of railway systems.

KTCS-M (CBTC) - Next-Gen Metro Signaling

KTCS-M is an advanced Korean Communication-Based Train Control system optimized for urban transit.

  • Cost Efficiency: Minimizes ground equipment (track circuits, ATP loop coils), significantly reducing installation and long-term maintenance costs.
  • LTE-R Connectivity: Enables real-time train tracking and control via LTE-R, enhancing transport capacity and shortening headways.
  • Proven Technology: Featuring our proprietary ST-KMX (STraffic KTCS-M eXtended) platform, designed with independent HW/SW and certified at the highest SIL4 safety level.
KTCS-M(CBTC) System

· KTCS-M(CBTC) System

High-Speed Rail Electronic Interlocking (IXL)

The interlocking system ensures safe train movements by coordinating key signaling equipment like switch machines and track circuits.

  • Safety Computing: Utilizes the SML400 architecture for secure execution of interlocking logic.
  • High Availability: Implements a 2-out-of-3 Safety Platform to prevent operational errors and ensure maximum system uptime.
Electronic Interlocking System Equipment Layout

· Electronic Interlocking System Equipment Layout

MJ81 Switch Machine

A critical infrastructure component that ensures safe track switching during train operations, delivering stable performance even in high-speed environments.

  • Verified Performance: Designed with consideration for speed responsiveness, operational stability, and ease of maintenance, the MJ81 has obtained safety equipment certification from KORAIL(Korea Railroad Corporation), ensuring proven reliability.
MJ81 Switch Machine

KTCS-2 Radio Block Center (RBC)

A core component of the ETCS Level 2-based train control system, the RBC generates Movement Authority based on train position information and ensures safe train separation.

STraffic has developed the RBC system leveraging its LTE-R communication technology and extensive experience in conventional signaling systems. The solution is designed to be scalable and adaptable, with future expansion toward an integrated train control solution applicable to diverse railway environments.

MJ81 Switch Machine
Case Study