Mariyung

The Mariyung, also known as the New Intercity Fleet (NIF) is a fleet of new trains being introduced to operate Sydney Trains electric intercity services in NSW. The trains are designated “D-Sets”. They will allow for the retirement of the aging V-Set fleet and the reallocation of the OSCar H-Sets to Sydney Trains suburban services. The new trains began operating services on the Central Coast & Newcastle Line on 3rd December 2024. They will enter service on the Blue Mountains Line on 13th October 2025, and will follow on the South Coast Line in 2026.

A total of 610 carraiges were manufactured by Hyundai Rotem in South Korea, and are maintained by UGL at the Kangy Angy Maintenance Centre on the Central Coast. They are formed of 4 and 6 car sets, which form 4, 6, 8 or 10 car trains in service. Four car sets are numbered D1-D70 and the 6 car sets are numbered D101-D155.

	DDA	DND	DN	DT	DNL	DD
Dxx	93xx	83xx	85xx	–	–	97xx
D1xx	94xx	84xx	86xx	96xx	88xx	98xx

The first two 10 car trains (D2+D102 & D3+D103) were delivered in December 2019 and began testing in January 2020. D4 & D104 arrived in mid-July 2020.

The new trains have two-by-two fixed seating with fold down tray tables. The DND cars have an accessible toilet and three bicycle racks. The DNL cars have an ambulant toilet and the DT cars have a large luggage rack. DN, DND, DNL and DT cars all have a luggage rack at one end of the lower deck.

As part of the introduction of the new fleet, the Blue Mountains Line required modifications to increase the loading gauge from “Narrow” profile to “Sub-Medium” profile. The work involved shaving platform edges, track slewing and “notching” of the Ten Tunnels near Lithgow. Additionally, stabling sidings and platforms have been lengthened to accomodate the 10 car trains, especially at stations where the trains will begin and end services.

Join the Mariyung (NIF) Appreciation Group on Facebook here.

For an overview of the early testing regime click here.

Timeline of events

• 8/5/2014 – NSW Government announce intention to order new fleet of intercity trains.
• 21/5/2014 – NSW Government invites organisations to tender for the new fleet.
• 8/2016 – Contract signed with consortium of UGL, Hyundai Rotem and Mitsubishi Electric to build 512 carriages, a new maintenance centre at Kangy Angy and to maintain the fleet for 15 years.
• 20/2/2019 – Additional 42 carriages ordered, taking total fleet size to 554.
• 12/2019 – The first trains (D2+D102 & D3+D103) are delivered to Port Kembla and taken to Eveleigh Maintenace Centre.
• 8/1/2020 – D102 becomes first train to begin testing between St Marys and Blacktown.
• 10/6/2020 – First train to Newcastle Interchange (D102).
• 20/7/2020 – Modifications to the Blue Mountains Line complete
• 30/7/2020 – First daylight run to the Central Coast (D103).
• 1/4/2021 – New trains are officially named “Mariyung”, the Dharug word for “emu”.
• 3/12/2024 – Mariyungs begin revenue service on the Central Coast & Newcastle Line, running express and limited stops services.
• 24/2/2025 – Following further infrastructure works, Mariyungs begin stopping at all stations on the Central Coast & Newcastle Line.
• 13/10/2025 – Mariyungs begin revenue service on the Blue Mountains Line.