It has emerged that the Redcliffe Peninsula (Petrie to Kippa-Ring) line carried fewer than one-third of the expected 21,000 daily customers.

“I think that is question that TransLink needs to answer,” Mr Easy said when quizzed on the line's poor performance.

Mr Easy announced on Monday that two additional New Generation Rollingstock trains had been added to the CityTrain network.

That meant 27 of the 75 new trains were now in service.

The two new trains will run on the Redcliffe Peninsula and the Springfield lines and provide 139 additional services a week.

However, Mr Easy also said the new trains did not mean extra express services to the Redcliffe line, despite calls for these services by commuters on Monday.

“At this point in time our focus in that we consistently provide the current timetable,” he said.

“So the resources that we have, supports that current timetable.

“We have recently seen in the June and July period and in the (August) holiday timetable for the Ekka, there was no downgrading in services.”

Mr Easy said that was because Queensland Rail had extra train crew.

“At this point in time I am not in a position to comment on other increases to services,” he said.

The Redcliffe Peninsula line will receive an extra 22 services, but not express services.

Mr Easy said there was a “one-seat journey”, which took 55 minutes, from Kippa-Ring to Brisbane Central on the line.

“When we are in a position to increase services, that is what we will do,” he said.

Public transport advocacy group Rail Back on Track has cited a lack of express services and poor bus connections with Hornibrook Bus Lines as major problems.

Hornibrook bus lines referred all enquiries about its bus services to TransLink.

A Translink spokesman, after Mr Easy's media conference, said there were 17 feeder bus services connecting to the Kippa Ring to Petrie rail line and 3000 car parks.

The bus connections are available to every station until 7pm except at Mango Hill East station, the spokesman said.

"While TransLink makes every effort to align bus services to train schedules, differences in service frequency, route lengths and traffic conditions mean this is not always possible for every service."

Mr Easy would not comment on the connection between bus lines and rail lines, although he has on other occasions.

“Queensland Rail is not responsible for the bus services or the connections,” he said.

“But what we will continue to do is work with TransLink and all the authorities in relation to the delivery of the timetable.”

The Queensland government will pay $4.4 billion over 32 years to add 75 of the latest trains and carriages to the CityTrain network.

The roll-out of the trains, which are assembled at purpose-built rail yards at Wulkuraka near Ipswich, have been marred by design flaws, driver shortages and union problems.

Mr Easy said “testing” of the trains would influence how quickly the remaining 48 trains would be added to the CityTrain network, but declined to give any indication to reporters.

“The timing for the deployment of the future lines is something that we will communicate to our customers in due course,” he said.

Mr Easy said the incident where one of the NGR trains came into contact with overhead power lines on July 7 was still being investigated by Queensland Rail.

“We do know there was an issue with the pantograph,” he said.

The pantograph is the structure on top of a train which connects to the electrical power supply.

“That led to the delinement (sic), but what we will do is conclude that investigation,” he said.

“That particular train was withdrawn from service and that matter has been rectified and the train has been returned to the network.”

Mr Easy also declined to answer a question about a possible merger of QR and TransLink into a single public transport authority.

“That is question you will have to address to the state (government),” he said.

In March, independent experts recommended a merger of Queensland Rail and TransLink after identifying “a serious culture of mistrust” between the two bodies.

CORRECTION: A previous version of this story stated the NGR trains would add 139 services to the timetable. The NGR trains will instead replace older trains on existing services.