ABSTRACT
The Italian Infrastructure Manager, RFI, operate at about 1550 km of tunnels, that is the 10% of the national railways network. Tunnels operated are on average 70 years old and they have varied infrastructural and operation characteristics. In order to guarantee over time a uniform level of safety, since 2012 RFI, every year, carries out an assessment of the risk associated with every 321 tunnels longer than 1000 m. The assessment starts form the analysis of the IM accident data and then identifies all the possible relevant and significant scenario that can develop. At the end, for each tunnel is provided a distribution of couple of value (frequency and fatalities) which through specific risk indicators are compared with the acceptance threshold established by the national law. This paper describes the Italian and European regulatory framework and focus first about the methodology used for the risk assessment and then about the management and monitoring of annual risk data.
