Sydney adds trains on T4, T8 and South Coast lines from 15 November

Sydney commuters on the T4, T8 and South Coast lines will get more frequent trains from 15 November 2026, when a new timetable takes effect, the New South Wales Government announced on 15 October. More than a million people live along the three lines.

On the T4 Eastern Suburbs & Illawarra Line, morning peak trains towards the city will run every four minutes at Sutherland instead of five, and every three minutes at Hurstville instead of three and a half. Fourteen stations will see a train on average every 7.5 minutes at peak, a frequency increase of up to 33%. All T4 services will stop at Sydenham, where passengers can change for Sydney Metro, and St Peters and Erskineville move to the T4.

The South Coast Line gains the most. Peak trains between Wollongong and the city will run every 15 minutes instead of every 20, and off-peak and weekend trains every 30 minutes instead of hourly, adding more than 200 services a week, according to the ministerial release. The line's new Mariyung intercity trains are completing their rollout.

The trade-off falls on the T8, renamed SYD Airport & South West. Its peak trains will run on average every four minutes between Green Square and Wolli Creek, up from every 6.5 minutes, and all of them will use the Airport Tunnel. South West passengers lose their direct peak trains to Sydenham, St Peters, Erskineville and Redfern and will have to change at Wolli Creek.

This is a classic untangling of a network. When lines share tracks and cross each other at junctions, one late train delays the others and limits how many trains can be timetabled. Giving each line its own path into the city removes those conflicts, which is why frequencies can rise without new track. The price is a forced change for some passengers. The government is also spending a record $2.1 billion on maintenance and incident response, and plans separate express tracks for T4 and South Coast trains between Arncliffe and Central.

The next step comes in 2027, when Kogarah is due to return as an express stop.

Sources: NSW Government, ministerial release (15 October 2026).

Photo: J03098, CC BY 4.0, via Wikimedia Commons

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