Quantitative estimation of operational safety level for track circuits in the French railway network using feedback: Risk management versus economic optimization

In the Security and Safety Excellence Program of SNCF Réseau, the aim of this study is to assess and to compare by several methods, the operational safety level (CENELEC EN 50129: SIL4) for signalling functions using tract circuit as block, interlocking, level crossing, … taking into account feedback in operational...