ADELAIDE train commuters will ride for free on Thursday as an official “thank you” for putting up with the Seaford electric line failure.

Substitute buses were used on the Seaford, Tonsley and Grange lines and diesel services shifted from other lines after power to the Seaford line failed last Thursday.

The State Government today said all train commuters would ride for free on Thursday across the metropolitan rail network.

Transport Minister Stephen Mullighan said the free services were “a thank-you to passengers for their patience during last week’s unexpected outage on the Seaford line”.

“The events of last week were incredibly frustrating for our rail customers with the introduction of substitute buses and the redistribution of diesel trains,” he said.

“Our train passengers across all lines were inconvenienced. However, they were extremely patient during the disruptions and this is one way of thanking them.”

Mr Mullighan said a full investigation had been launched into the cause of the power outage which led to the disruptions.