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SEPTA Launches CBTC Service on Media–Sharon Hill Line
SEPTA begins revenue service with a Hitachi Rail Communications Based Train Control system, modernizing 11.9 miles of light-rail trolley operations in the Philadelphia region.
www.hitachirail.com
The Southeastern Pennsylvania Transportation Authority (SEPTA) has initiated revenue service using a new Communications Based Train Control (CBTC) digital signaling system on the Media–Sharon Hill Line. The upgrade, delivered by Hitachi Rail, modernizes one of the remaining interurban trolley systems in the United States.
The CBTC deployment covers approximately 11.9 miles of light-rail service from the 69th Street Transportation Center to the communities of Media and Sharon Hill. The corridor operates with overhead electrification and trolley-gauge track and includes replacement of legacy signaling infrastructure.
SelTrac-Based Digital Signaling Architecture
The system incorporates upgraded SelTrac™ CBTC technology to provide continuous train-to-wayside communication and precise train location monitoring. CBTC replaces fixed-block signaling with moving-block principles, enabling more efficient train spacing based on real-time position data.
The upgraded architecture is designed to:
- Increase line capacity through reduced headways
- Improve operational performance and schedule adherence
- Support scalable expansion and flexible system configuration
- Lower lifecycle and maintenance costs through digital diagnostics
Advanced data analytics embedded in the system support performance monitoring and predictive maintenance strategies.
Automatic Train Protection and Supervision
The deployment includes automatic train protection (ATP) and automatic train supervision (ATS) functionality. ATP enforces speed limits and prevents unsafe train movements by continuously monitoring train position and speed relative to movement authority. ATS provides centralized operational oversight, enabling real-time monitoring and system-wide traffic management.
These technologies enhance safety by reducing the risk of overspeed incidents and signal violations while supporting more efficient dispatching and service regulation.
High-Resolution Train Localization
The CBTC system integrates wayside transponders and onboard sensors to provide high-resolution vehicle location data. Continuous position updates support vital safety functions and ensure reliable onboard system performance.
Precise localization enables optimized braking curves, smoother operations and improved service reliability along the corridor.
Automatic Train Protection and Supervision
The deployment includes automatic train protection (ATP) and automatic train supervision (ATS) functionality. ATP enforces speed limits and prevents unsafe train movements by continuously monitoring train position and speed relative to movement authority. ATS provides centralized operational oversight, enabling real-time monitoring and system-wide traffic management.
These technologies enhance safety by reducing the risk of overspeed incidents and signal violations while supporting more efficient dispatching and service regulation.
High-Resolution Train Localization
The CBTC system integrates wayside transponders and onboard sensors to provide high-resolution vehicle location data. Continuous position updates support vital safety functions and ensure reliable onboard system performance.
Precise localization enables optimized braking curves, smoother operations and improved service reliability along the corridor.
