But it unclear if the South Coast line will see any of the rolling stock that will be freed up as the New Intercity Fleet is introduced from next year.

There have been calls for the government to add carriages to two crowded four-car afternoon trains on the South Coast line.

Kiama MP Gareth Ward has just launched a petition pushing his own government to take action – a sign some have taken to mean it is already a done deal.

While Transport for NSW is now developing plans for the reallocation of trains and carriages, any decisions won’t be finalised for some time.

READ MORE: Government data shows crowded trains

What is known is that Sydney will definitely get some of the Oscar trains that could also operate on the South Coast.

“V-Set trains will be progressively retired following the introduction of the New Intercity Fleet while the Oscar sets will primarily be re-deployed to the Sydney Trains Network enabling some of the older train sets to be retired,” a Transport for NSW spokesman said.

It remains to be seen whether the South Coast will get any of those remaining Oscars.

“We will be reviewing customer OPAL data and patronage counts to optimise the utilisation of new and existing rolling stock, to deliver improved customer outcomes across the rail network,” the spokesman said.