Risk assesment of a new high-speed railway

A quantitative risk assessment has been carried out for theconceptual stage of the proposed Channel Tunnel Rail Link (CTRL).The assessment is one of the first for a railway system. Itincludes an integrated computer model. The whole risk modelfor the CTRL from base event data, through fault and event trees,to individual, collective, and societal risks is processed usingLotus 1-2-3 spreadsheets. Variations to the design and operationalassumptions and to the input data can be introduced into themodel, and the effect on risk calculated rapidly. This versatilityis particularly useful because of the early stage of the project.It can be used to assist designers in consideration of possibledesign changes.