Here you will find some definitions of construction and rail terms used in some of our work notifications and fact sheets.


Construction that involves modifying or excavating soil. This may include removing soil and rock from the rail corridor to prepare the track for new infrastructure.

Platform extensions

Construction to lengthen an existing platform for upgrades, new infrastructure, or to accommodate longer trains.

Rail corridor

Land on which the railway is constructed. It includes all area and property up to 15 metres either side of the outermost parts of the rail track.

Service proving

A process to identify the depth and position of underground services, like drains and cabling. It helps us to understand the existing structures in an area to enable appropriate planning, design and construction.


A process to understand land quality prior to starting construction. It lets us know where work can be safely performed to maximise efficiency and guide designs.

Traffic controllers

A trained person who helps direct and manage the flow of road, cyclist and pedestrian traffic. They are important around construction sites to ensure safety and efficiency.

Train stabling

Where trains are parked while not in operation. Here they are cleaned internally and prepared for the next day. Train stabling facilities operate almost 24 hours a day, from approximately an hour before the first train service starts until an hour after the last service ends.

Tree Protection Zones

A safe boundary for selected trees, ensuring they aren’t impacted during construction.

Underground services

Utilities which carry electricity, sewage, drainage, communications and water below or underneath the rail tracks.

Wheelchair boarding platforms

Pads that raise the platform height to meet the level of the train entry. It supports unassisted access on and off trains for mobility impairments or prams.