Directive (EU) 2016/797 on the interoperability of the rail system within the European Union defines ‘technical specification for interoperability’ (TSI) as a specification covering a subsystem or part of a subsystem to meet the essential requirements and ensure the interoperability of the Union rail system. For the purpose of this Directive one functional area of the Union rail system is telematics applications for passenger and freight services.

Telematics TSI for interoperability of data sharing in rail transport (TEL TSI)

As of 2 March 2026, following the European Commission’s adoption on 6 February 2026 of the Implementing Regulation (Commission Implementing Regulation (EU) 2026/253) requirements for interoperable data sharing in rail transport via a new telematics TSI, these requirements will take effect. The previous regulations on TAF and TAP are repealed.

The regulation is directly applicable in all Member States and by all stakeholders.