The State Opposition has dismissed a Government commitment to spend $56 million on new railcars for Perth's train network as too little, too late.
The Government says it will purchase an additional 15 railcars but commuters will have to wait until the end of 2013 for them to be rolled out.
The Transport Minister, Troy Buswell, says the carriages will bring the total railcar investment to $243 million dollars and suggests it is likely to be funded by borrowings.
Mr Buswell says Perth's population growth has prompted the funding allocation.
"Generally, major capital purchases by the PTA [Public Transport Authority], like railcars, are paid for with borrowed money," Mr Buswell said.
"We think it's important that we borrow funds for purposes like this to make sure that we can grow the capacity of our rail network," Mr Buswell said.
But the Opposition's Transport Spokesman, Ken Travers, says the funding allocation is not sufficient.
"Passenger growth has been double what was predicted and that's why we actually needed to hear from the Minister today that he was ordering 30 new rail cars not 15," Mr Travers said.
"Perth passengers are going to continue to face sardine-like conditions on our trains." The carriages are due to be rolled out from late 2013.