Technical Standards Safety Review

During the parliamentary design of the Phase One railway a number of Deliverable Approach Statements (DAS) were raised to provide the technical requirements and associated guidance for the design of the railway within the parliamentary design scope. As part of the specification design phase these DAS were updated to Technical Standards to include changes to the design and specific route wide requirements. As part of the parliamentary design a functional definition of the new High Speed Railway (HSR) was assessed through the System Safety principles and the DAS were used as evidence to show that design decisions taken did not preclude the possibility of hazard acceptance within the more d…