EN 50129
Railway Signaling Safety Cases
EN 50129 defines the safety case for railway signaling and safety-related electronic systems. It explains how to organize claims, evidence, quality management, safety management, and technical safety arguments.
Use it when a rail authority, operator, assessor, or customer needs a defensible argument that a signaling or control system is acceptably safe for its application.
CSA helps plan safety cases, close evidence gaps, prepare reviews, connect and work products, train teams, and staff rail assurance roles.
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Gap reviews, safety lifecycle audits, evidence checks, and assessment readiness.
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Safety plans, safety cases, traceability, verification evidence, and assessor response support.
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Jeff Twombly, PEExecutive, Rail SafetyProvides executive and technical leadership for rail-safety programs, assessments, and complex transit-system work. His experience spans safety assurance, transportation-safety leadership, signaling, and independent review.Services for EN 50129
View all servicesSafety Program & Certification Support
Embedded CSA engineers execute safety lifecycle work products inside your program at the cadence your schedule demands.
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A senior CSA safety manager guides your certification strategy and program management on a part-time, ongoing basis.
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Structured assessment of your current safety lifecycle and evidence against target standards, delivering a certification roadmap with effort estimates.
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