- Relates to the provision of electrical power for railways, electrical traction power for Rolling Stock. Excludes electrical systems within Rolling Stock.
- All track and components. Includes civil structures associated with rail infrastructure within the rail corridor
- Rail Traffic Crew, Station staff, Management of rail traffic, Signallers, Network Control Officers, application of Safeworking procedures. Activities of track protection staff.
- Rolling Stock
- Locomotives, passenger vehicles, freight wagons, track vehicles, RRV's.
- Train Control
- Signalling infrastructure its design and operation, its equipment and subsystems. May include related control systems mounted on/in Rolling Stock, train protection and control systems, computer based control systems in control centres, communications systems for train control