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Browse the A-Z below for some rail-specific terms that are used in this website, together with their meanings.
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Independent reporter reviewsThe role of the independent reporter is to provide ORR with independent, professional opinions and advice relating to Network Rail's (as the railway licence holder) provision or contemplated provision of railway services, with a view to ORR relying on those opinions or advice in the discharge by ORR of its functions.
Infrastructure incidentAn event involving Network Rail owned infrastructure which may delay normal train operation.
InvestmentsInvestments cover all enhancements but also include major projects such as route upgrades or renewals.
Institution of Railway Signal Engineers