Glossary

Browse the A-Z below for some rail-specific terms that are used in this website, together with their meanings.
 

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  • I

  • ILGGRI

    International Liaison Group of Government Railway Inspectorates

  • Industry committee

    Alternative name for the access dispute resolution committee, the committee appointed under the access dispute resolution rules (ADRR).

  • Infrastructure incident

    An event involving Network Rail owned infrastructure which may delay normal train operation.

  • Investments

    Investments cover all enhancements but also include major projects such as route upgrades or the renewal of Network Rail’s telecoms network, which are largely renewals.

  • IQPC

    International Quality & Productivity Centre

  • IRSE

    Institution of Railway Signal Engineers