Queensland Rail has apologised to commuters and admitted their recent performance has been unacceptable following the cancellation of 100 train services in Brisbane.
The cancellations on Friday, due to a driver shortage, affected almost every train line in the city and state-government authority TransLink was forced to move passengers onto buses.
QR chief executive Helen Gluer took personal responsibility and conceded the rail network was under-resourced and unprepared for the new Redcliffe Peninsular line.
"The performance of Queensland Rail since the new Redcliffe Peninsular line has opened has been unacceptable and from our customer's perspective, totally unacceptable," she said.
"We know now that we had unrealistic assumptions on how much train crew we did need to run this new timetable.
"This is my fault, this is Queensland Rail's fault and we had unrealistic expectations on what crew we needed to actually run this timetable."
An interim timetable would be developed over the weekend to give customers a more reliable service, Ms Gluer said.
"At the moment, our total focus is on getting a timetable out that we can deliver to."
The latest blow for Queensland Rail comes after nearly 50 train services were cancelled in southeast Queensland due to similar rostering issues.
Queensland's opposition quickly jumped on the Labor government seeking an explanation for the driver shortage, after morning peak services were affected.
Shadow transport minster Andrew Powell accused the government of running the southeast Queensland rail network into the ground since taking office 18 months ago.
"The Redcliffe Peninsula Line has been a long time coming. Where was the transport minister (Stirling Hinchliffe) and why weren't proper staffing provisions put in place to ensure a smooth transition?"
