Cross River Rail

Cross River Rail (CRR) is an underground heavy rail project currently under construction in Brisbane, Queensland, Australia. The project will see the development of a new rail line underneath the Brisbane River, together with the redevelopment of a number of stations in the Brisbane central business district as well as the Beenleigh railway line. The business case for the project was released in August 2017, with construction officially beginning in September 2017. The project replaced the planned 2013 BaT Tunnel, which in turn replaced the original 2010 Cross River Rail proposal. It is the largest infrastructure megaproject ever undertaken within Queensland. It has been widely reported that the cost of completion and date of the Cross City Rail Queensland Project was delayed and blown-out to $17 billion and expected to be opened in the year 2029, respectively.

Cross River Rail consists of a new 10.2 km (6.3 mi) line through the CBD from Dutton Park in the city's south to Bowen Hills in the city's north, connecting existing Brisbane rail lines. The project includes 5.9 km (3.7 mi) of twin tunnels and will deliver four new underground stations at Boggo Road, Woolloongabba, Albert Street and Roma Street, with Exhibition station upgraded. Tunnelling for the project was completed in 2021, with construction planned to be complete by 2025 and the new line operational by early 2026. It also includes 7 upgraded stations and 3 new Gold Coast stations.

The project provides a second rail crossing of the Brisbane river due to concerns that the only inner-city rail river crossing, the Merivale Bridge, would reach capacity. According to the project's business case, without the new tunnel overcrowding on most lines would be expected by 2026. Cross River Rail is considered to be the highest infrastructure priority by the Queensland Government. Infrastructure Australia evaluated the business case in 2017 and expressed concerns that the rail patronage projections may not be achieved and that the benefits in the business case may be overstated. However, Infrastructure Australia still listed Cross River Rail as a priority project.

Under the plan, Queensland Rail Citytrain will operate in three sectors, all connecting at the existing or new underground Roma Street stations. Sector One will connect the Gold Coast and Sunshine Coast directly, operating trains from Varsity Lakes and Beenleigh through to the Redcliffe Peninsula, Nambour and Gympie. Sector Two will link the Rosewood and Springfield lines through Central to the Brisbane Airport and Shorncliffe. Sector Three will run Ferny Grove trains through Central and Southbank to Cleveland.

In May 2024, the Liberal National Party (LNP) announced that, if elected at that year's state election, they would rename the Cross River Rail corridor the Elizabeth line, as a tribute to Elizabeth II. In May 2025, Deputy Premier Jarrod Bleijie reaffirmed this pledge. The current Minister for Transport, Brent Mickelberg, has stated that although Cross River Rail could be renamed at some point in the future, it is not an immediate priority for the government.