Certification in control command and signalling system investment processes

Railway system infrastructure, including control subsystems, is subject to continuous normative technical and legal regulations as defined by EU directives and European Commission regulations, as well as national railway administrations decrees. The aim of regulation is the optimization, harmonization and pursuit of the full interoperability, among others, of control subsystems, through the Control Command and Signalling Technical Specifications for Interoperability (CCS TSI), thereby providing consistency in terms of safety assurance level improvements. Regardless of TSI and baseline specification sets, it is crucial that certification processes function according to specific rules and procedures. In this publication, certification issues concerning a control subsystem and its elements will be discussed. It is assumed that the certification process should include a complex approach to CCS, starting from the project phase and finishing at the adaptation and trial exploitation phase. It is critical that CCS system adaptation is intensified in the PKP PLK.