State Members for Pine Rivers and Kallangur have welcomed a further $68.39 million commitment in today's State Budget for the construction of a third railway line between Lawnton and Petrie Stations.

The 2013-14 commitment forms part of an overall project budget of $168.6 million needed to fix the bottleneck between the two stations.

"This is an important, and significant, transport infrastructure project that will ensure better operation of services along the Caboolture line," Mr Seath Holswich, State Member for Pine Rivers, said.

"This bottleneck has been an issue for a number of years and it's pleasing to see the Newman Government taking action to correct the problem."

Mr Trevor Ruthenberg, State Member for Kallangur, added that this third track will alleviate any further congestion issues that may have arisen once the Moreton Bay Rail Link comes online in 2016.

"By ensuring this third track is built in time for the Moreton Bay Rail Link, we will minimize any potential delays caused by additional services on the Caboolture and Redcliffe lines," Mr Ruthenberg said.

"Mr Holswich and I have been working hard to ensure that the necessary funding for this project was secured and we are pleased to see the Government's strong commitment to transport infrastructure in our region."

"This extra line will provide a more efficient public transport network for Kallangur and Pine Rivers residents."

"The Newman Government is committed to providing necessary public transport infrastructure where it's needed, when it's needed," Mr Holswich added.