Passengers travelling on the Ferny Grove railway line will benefit from off-peak services every 15 minutes from next month – but similar frequency boosts may be years away on other lines.

The Liberal National Party promised during the state election campaign to introduce 15-minute off-peak frequency on the Ferny Grove line.

The state government will trial having trains every 15 minutes on the Ferny Grove line for two years before looking at rolling out such services on other lines. Credit:Michelle Smith

Transport Minister Scott Emerson announced today the extra services would begin on October 8, at a cost to the government of $18 million over two years.

Mr Emerson said the move to 15-minute frequency would mean an extra 28 train services a day between 9am and 3pm.