Almost 100 services will be cut from Sydney's train network starting next week as the state government tries to avoid another system meltdown.
Management confirmed on Thursday it will be making some "tweaks" to the timetable introduced in November 2017, but is promising minimal impact.
Most of the 94 services to be axed are off-peak trains running between 7pm and 6am on weekdays, and a small number on weekends - they make up less than one per cent of the thousands of services that run each west.
The changes will free up more drivers and give greater capacity to deal with delays when incidents occur, he said.
This follows a high-level review into the rail network's ability to recover from major incidents after passengers endured two days of delays and cancellations in early January.