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2. Capital city SA4 design will take into account any likely changes in urban development and the transport network over the next 20 years.
The impact of this on the definition of each capital city compared with the current (SD) definition varies throughout Australia. Below is a brief description of the impact of the changes on the definition of each capital city.
The Capital City definition of Sydney remains essentially unchanged from the current Sydney SD, apart from several small differences around National Parks in the south and west. These do not involve any population.
The Capital City definition of Melbourne has been extended from the current SD particularly in the north and west. In the northwest, Census travel to work data showed significant commuter interaction outside the current Melbourne SD boundary. Using this data to inform the design, the boundary has been extended as far as the towns of Bachus Marsh, Macedon, Lancefield, Wallan and Kinglake. To the south and east, the boundary remains unchanged with the exception of a small area east of Warburton.
The Brisbane Capital City definition has been extended from the current SD primarily in the south and west. In the south west the boundary extends to the NSW border to include Beaudesert and Boonah. While the southernmost parts of this area are quite rural in character, its low population means it cannot be contained in a separate SA4. Given that around one third of the workforce is currently employed in Brisbane, this area has been included in the Brisbane Capital City.
The boundary between the Gold Coast and Brisbane has been adjusted south from the Logan River to the Pimpama River, as the travel to work data shows the area between these two rivers to have significantly stronger links with Brisbane than the Gold Coast.
In the north west, the new Capital City definition extends out to include Laidley, Esk and Kilcoy where Census data shows a large proportion of commuter interaction with Brisbane and Ipswich.
The Capital City definition of Adelaide has extended from the current SD to the north and significantly to the east. To the east the Capital City definition has extended to include a larger area of the Adelaide Hills; towns such as Mt Barker and Lobethal are now included because of the significant commuting interaction with Adelaide. In the north the new boundary has been extended out to contain Gawler as well as Roseworthy and Two Wells, both of which have been identified as possible future growth areas in the Greater Adelaide 30 year plan.
The Perth Capital City definition has been extended from the current SD in the south to include Mandurah and Pinjarra. Travel to work analysis shows these areas have strong labour market links with the south west of Perth. The remainder of the Perth Capital City definition remains unchanged from the current SD.
The Capital City definition for Hobart remains unchanged from the current SD, apart from a small adjustment on the outskirts of Sorrell to the north east of Hobart. This change involves only a very small population and results from differences between the SA2 design and Statistical Local Areas. Travel to work data suggests that the labour market of Hobart extends outside this definition of Hobart and this is reflected in the adjacent SA4. This extended definition of the Hobart labour market was considered impractical for Capital City purposes and consequently the existing SD definition was retained, this contains the vast majority of the population of the Hobart labour market.
The Darwin Capital City definition remains unchanged from the current SD. Travel to work data shows that the existing boundary accurately reflects the Darwin labour market.
The Capital City definition of Canberra now extends to include the entire ACT. While this involves a large change in area from the current SD the difference in population is minimal. The non-urban component of the ACT has too small a population to be included in a separate SA4 and consequently the SA4 defining Canberra must include the entire ACT.
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