The T4 Upgrades under consideration were the first stage of what became the More Trains More Services Program. The program of work to address capacity issues initially included:
- STAR Project,
- Hurstville to Sutherland Quadruplication,
- T8 Transformation,
- NIF Project Impacts,
- Hurstville Crossover,
- Sutherland Stabling,
- T4 Station Upgrades.
