Agile Software Development
Princeton has an unrivaled track record in designing custom Rail software applications ranging from strategic tools to core operating systems. Many of our solutions have been adopted throughout the industry.
Case Study
Modern Rail Software Development for Train Marshaling and Reporting in the Railway Industry
A Class 1 railroad is undergoing a major rail system modernization effort to enhance operational efficiency, reliability, and safety. As part of this initiative, the railroad is upgrading its Yard Management System—a safety-critical system composed of multiple interdependent software components essential to the efficient movement of freight across the network.
To support this transformation, Princeton delivered a next-generation integrated train marshaling rules engine that enables automated validation and construction of train consists, ensuring full compliance with railway industry marshalling rules. This new rail software solution integrates with legacy applications while adhering to EN 50128 standards and supporting model-based systems engineering (MBSE) principles to strengthen software quality and system reliability.
The solution includes:
Enhanced train reporting capabilities that automatically reconcile planned consists with train scanner data, improving data integrity and operational accuracy.
AI/ML-powered analytics to generate real-time alerts and notifications when discrepancies or safety issues are detected, enabling proactive interventions.
Full support for static analysis tools, structural code coverage, and unit testing to ensure a robust validation and verification (V&V) process throughout the software development lifecycle.
A comprehensive set of test cases, security standards, and documentation to support long-term maintenance, compliance, and customer confidence.
The software development process emphasized automation, performance, and rapid deployment. Leveraging a modular framework, Princeton’s team of expert developers was able to design, develop, and deploy the application within just six weeks, demonstrating our ability to accelerate delivery without compromising safety, process integrity, or cost efficiency.
Case Study
Railway Software Development for Scalable and High-Quality Yard Management
A Class 1 railroad’s original yard management platform, launched in the late 1990s, was designed to centralize yard operations and enable enterprise inventory management through real-time tracking of car and train movements. Over time, the system evolved into a monolithic code base—complex, inflexible, and increasingly difficult to maintain in today’s dynamic railway industry environment.
Facing increasing costs, reduced operational efficiency, and maintenance challenges, the railroad turned to Princeton to lead a full software development overhaul. Leveraging our deep expertise in rail software development and safety-critical systems, Princeton re-envisioned the platform using a modular architecture designed for today’s agile development processes.
Redesigned core yard management capabilities, aligned with reimagined business processes and built to optimize performance, reliability, and safety.
Non-core functions were decoupled into separate, interoperable software components, improving system modularity, integration, and long-term scalability.
Development aligned with EN 50128 standards, incorporating model-based systems engineering (MBSE) to ensure compliance and system validation.
A comprehensive set of test cases and simulation tools to validate real-time operations in a safe, controlled environment.
Improved user access, modern interfaces, and a streamlined deployment and maintenance framework for seamless updates and enhancements.
Princeton re-envisioned and developed a new- generation, modern platform which focuses on core yard management capabilities that support reimagined business processes, taking advantage of the significant advances in technologies, while non-core capabilities will be decoupled and provided outside of the application.
Case Study
Improving Safety and Operational Efficiency with PTC and SATS Rail Software
Since Positive Train Control (PTC) was federally mandated in 2008, Princeton has led the way in delivering advanced rail software development solutions that enhance safety, security, communications, and signaling. These safety-critical systems are designed to help the railroad industry comply with regulatory standards while also improving operational efficiency and leveraging real-time data for smarter decision-making. Princeton’s development approach incorporates model-based systems engineering (MBSE), strict software quality controls, and a focus on validation, testing, and long-term maintenance to meet the complex needs of modern railway systems.
At the core of this innovation is SATS (Signal Automation Test System)—the industry’s leading signal design, testing, and simulation platform. SATS is widely used by freight railroads, transit agencies, and engineering firms, offering a comprehensive set of tools for unit testing, static analysis, structural code coverage, and test case creation. Built with modular software components and designed for seamless integration, SATS supports the full project lifecycle from development through deployment. It empowers engineers, developers, and designers to build safer, more reliable rail systems while reducing costs, enhancing performance, and supporting ongoing compliance with standards such as EN 50128.