Rail network in South East Queensland

• Beaudesert line – Bethania to Beaudesert.
• Beaudesert Shire Tramway – Beaudesert to Lamington and Rathdowney, operated by the Beaudesert Shire.
• Belmont Tramway – Norman Park to Belmont, variously operated by the Belmont Shire, Queensland Railways and Brisbane City Council.
• Bulimba line – Brunswick Street to Newstead.
• Canungra line – Logan Village to Canungra.
• Pinkenba line – Doomben to Pinkenba.
• South Coast line – Beenleigh to Southport and Tweed Heads.
• Wooloongabba line – Dutton Park to Stanley Street and South Brisbane wharves.

A third track was laid between Salisbury and Kuraby stations, a length of 9.5 km (5.9 mi). Previously two tracks, the added capacity allows Gold Coast line services to operate with less chance of delays. Seven railway stations along the section were significantly upgraded. The project was commissioned on 2 March 2008.[8]

A second track was laid between Mitchelton and Keperra railway station, including an upgrade to the intermediate stations, Oxford Park and Grovely. Upgraded with two platforms, this upgrade allows additional services to operate on the line during peak hour, and will also remove waiting times outbound from Mitchelton and inbound from Keperra. Other improvements include lifts and footbridges, to meet the Disability Standards for Accessible Public Transport, and new, modern station buildings.[9] The further duplication of the railway between Keperra and Ferny Grove stations, plus an additional platform and parking at Ferny Grove has been completed.

The line between Ormeau and Coomera stations, 6.7 km (4.2 mi) in length, was duplicated in October 2006, allowing for additional capacity.[10] Similarly, the 16.6 km (10.3 mi) length between Helensvale and Robina stations is being duplicated, and should remove the need for a four-minute layover at Helensvale for Robina services to wait for the Brisbane service due to the single track either side of the station. It was completed on July 2008.[11]

5.2 km (3.2 mi) of track between Corinda and Darra stations was quadruplicated. Previously four tracks to Corinda then two to Ipswich, the quadruplication allowed for greater capacity, especially with the Springfield railway line branching from Darra station.

13.7 km (8.5 mi) of track north of Caboolture station to Beerburrum station has been duplicated and re-aligned, along with the construction of stations at Elimbah and Beerburrum. Construction work began in 2007, and the project was commissioned on 14 April 2009.[12]

From Beerburrum station, 17 km (11 mi) of track to Landsborough is proposed to be similarly duplicated and re-aligned. This project is in planning stage, with construction scheduled to begin in 2020.[13]

A 4.1 km (2.5 mi) extension of the Gold Coast railway line from Robina to Varsity Lakes is completed. This is the first stage of the proposed progressive extension of the line to the Gold Coast Airport. Further extension of the line including proposed stations at Tallebudgera, Elanora and Tugun is expected to be constructed after the completion of the Cross River Rail project.[14]

The Maroochydore railway line (or CAMCOS, Caloundra and Maroochydore Corridor Options Study), is a proposed single track line that was initially due for construction and progressive completion in stages between 2015 and 2020. However, with the launch of the Connecting SEQ 2031, a regional plan for the future of transportation in South East Queensland, the project was postponed to start in 2031, or even after.[15] It will branch from the existing Sunshine Coast line after Beerwah railway station to Caloundra and Maroochydore in Sunshine Coast.[16]

The Springfield railway line is a line extending from Darra railway station on the Ipswich line to the Springfield area. The 26 km (16 mi)[17] extension of the network had a total cost of $475 million and was completed in December 2013.[18]

The Redcliffe Peninsula railway line (previously known as the Moreton Bay Rail link) is a suburban railway line extending 27.5 km (17.1 mi) north-northwest from Brisbane central business district (approximately 40.1 km (24.9 mi) from Central station. The line is part of the QR Citytrain network, branching from the existing Caboolture line immediately after Petrie railway station, and extend to the Redcliffe peninsula. It was more seriously identified and anticipated in the 1970s, and the land was purchased in the 1980s although the line was not built. Construction commenced in 2013 and the line was opened to passengers on 4 October 2016.

On 26 August 2007 the then-Minister for Transport and Main Roads, Paul Lucas, announced the Inner City Rail Capacity Study to look at underground rail access under the Brisbane central business district. Dismissing a City Loop-style scenario similar to Melbourne, citing the relatively small size of the CBD and "technical and operational constraints", Lucas imagined an underground line from Park Road station to Woolloongabba, then across the Brisbane River to connect with the Exhibition railway line, with major new stations at Woolloongabba, Gardens Point/QUT, and in the CBD. The study will also investigate the feasibility of the Exhibition line operating all year with new stations, and the upgrading of existing lines with additional tracks. Lucas allocated A$5 million to the study and appointed AECOM and Parsons Brinckerhoff as consultants to "look at options for boosting rail capacity in the city centre, including potential for an underground tunnel".[19] This project, Cross River Rail, is now under construction and due to open in 2024.