49 CFR 236
PTC - Positive Train Control Regulations
49 CFR 236 is a functional safety or safety-assurance reference for Rail & Transit. It defines the expectations teams use to turn hazards into requirements, evidence, reviews, and release decisions.
Use it when customers, regulators, assessors, or internal safety governance need a defensible standard-specific argument. The exact scope depends on the product, market, safety functions, and lifecycle phase.
CSA helps interpret the standard, assess gaps, prepare certification evidence, train teams, and staff experienced safety engineers or assessors.
Quick facts
The certification path CSA runs for 49 CFR 236
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How CSA helps with 49 CFR 236
View servicesAssessment
Gap reviews, safety lifecycle audits, evidence checks, and assessment readiness.
View servicesCertification support
Safety plans, safety cases, traceability, verification evidence, and assessor response support.
View servicesTraining
Private workshops and standard-specific training for engineering, product, and leadership teams.
View servicesStaffing
Contract, direct-hire, embedded, and fractional safety leaders matched by standard and domain.
View servicesCompanies working to this standard
232 companies in the All Companies directory are mapped to 49 CFR 236 by the generated company data.
49 CFR 236 Professionals
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.
Ken JacksonPrincipal Safety EngineerBrings senior safety-engineering and research experience to complex rail and transportation analysis, assurance, and program-leadership work.Services for 49 CFR 236
View all servicesSafety Program & Certification Support
Embedded CSA engineers execute safety lifecycle work products inside your program at the cadence your schedule demands.
View serviceFractional Safety Manager
A senior CSA safety manager guides your certification strategy and program management on a part-time, ongoing basis.
View serviceFunctional Safety Gap Analysis & Roadmap
Structured assessment of your current safety lifecycle and evidence against target standards, delivering a certification roadmap with effort estimates.
View service49 CFR 236 in the wiki
View the full glossaryNot sure how 49 CFR 236 applies to your product?
A call with a CSA engineer will map the standard to your product and market in plain language.