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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  • H

  • High hazard fault

    Loss of train detection or obscured signals.

  • HLOS

    High level output specification:- A key feature of an access charges review. Under Schedule 4 of the 2005 Railways Act, the Secretary of State for Transport (for England and Wales) and Scottish Ministers (for Scotland) are obliged to send to ORR a high level output specification (HLOS) and a statement of funds available (SoFA), to ensure the railway industry has clear and timely information about the strategic outputs that Governments want the railway to deliver for the public funds they are prepared to make available. ORR must then determine the outputs that Network Rail must deliver to achieve the HLOS, the cost of delivering them in the most efficient way, and the implications for the charges payable by train operators to Network Rail for using the railway network.

  • HSC

    The Health and Safety Commission merged with the HSE on 1 April 2008.

  • HSWA

    Health and Safety at Work etc Act, 1974.