New South Wales transport minister Gladys Berejiklian has announced that OPAL card pop-up kiosks have been installed at 28 train stations in Sydney, Australia, in a move to retire old paper tickets from 1 September.

Opal will be available in both adult and child/youth versions and customers must load $20 for adult card and $10 for child/youth card using a credit or debit card.

"Customers can now immediately join more than 440,000 people who have access to cheaper and more convenient travel with Sydney’s new electronic ticketing system."

Berejiklian said: "Customers can now immediately join more than 440,000 people who have access to cheaper and more convenient travel with Sydney’s new electronic ticketing system.

"A customer who collects their Opal card this morning and makes two journeys a day with it will be enjoying free trips by Thursday night, which is just one of the many benefits Opal has to offer."

Opal cards can be collected at Ashfield, Bankstown, Blacktown, Bondi Junction, Burwood, Campsie, Central, Chatswood, Circular Quay, Edgecliff, Epping, Hornsby, Hurstville, Kings Cross, Lidcombe, Liverpool, Macquarie University, Martin Place, Newtown, North Sydney, Parramatta, Penrith, Redfern, Rockdale, St Leonards, Strathfield, Town Hall and Wynyard stations.

Additionally, the Opal card kiosks will be available on Wednesdays, Thursdays and Fridays from Bondi Junction, Central, Chatswood, Hurstville, Kings Cross, Lidcombe, Parramatta, Strathfield and Town Hall stations.

Opal cards can also be used on all suburban and intercity trains, all Sydney Ferries services and more than 1,700 buses.