Suburban Development

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GUEST OBSERVER
The global trend towards suburbanisation and suburbanisms (meaning suburban ways of life) has an important infrastructure dimension.
In both growing and shrinking suburbs, decisions on infrastructure – mobility systems, water and waste water systems, and energy distribution and production networks – have been central.
Around the world, major transport and water/wastewater infrastructures often drive mushrooming peripheral growth. Big pipes, expressways, rapid transit lines, gas supply and the electricity grid, for example, have traditionally preceded residential subdivisions and commercial development.
In other areas (often in less-developed contexts), infrastructure development lags behind peripheral expansion. Informal settlement patterns, rapid and unequal peri-urbanisation and high degrees of social segregation characterise these areas.
In more mature suburban environments and in high-growth regions, gridlock, system failure and all manner of bottlenecks are typical.
The various forms of infrastructure need to be situated within their societal context. Infrastructures are contested between constituencies and are powerful instruments of social regulation. Central to our argument is the view that the ramifications stretch far beyond the expectations and control of decision-makers.
Suburbs are sites of stress
Suburban areas, in their multiform, emerging worldwide configurations, feel infrastructure stress most acutely. Having to deal with severe infrastructure inadequacies, suburbs offer fertile ground for infrastructure experimentation and innovation.
All infrastructures share a common characteristic. At the very core of the concept is the role of supporting the functioning of different aspects of society.
We differentiate two types of infrastructure.
The first is the “hard” physical, public-works-type infrastructure: roads, highways, water and sewage systems, railways, wires, cables and transmitters. This includes the political, organisational know-how and financial requirements for their design, construction, operation and maintenance.
The second category can be described as “soft” or social infrastructures. These consist mostly of services.
Infrastructures are central to newer, non-central portions of metropolitan regions in this era of global suburbanisation. This is because they operate as conduits, facilitators and sometimes the main ingredient of that extension. Infrastructures order these suburban landscapes and make them accessible.
One feature common across the suburban environment is its fragmentation. Fragmentation is built into the morphology of the suburb. Its territory is dissected by the transport and utility infrastructures connecting the central city to its hinterland and the rest of the world.
An important, underrated aspect of suburban infrastructures is their tremendous importance for how the entire urban region functions. Suburban infrastructure, often thought of as merely functional for the suburban constellation itself, remains multi-scalar – that is, it also supports metropolitan and higher-scale purposes.
Thus, infrastructures work as fragmenting and sorting mechanisms of complex suburban landscapes.
Infrastructures play a central role in building suburbs but are also the foundation for the retrofitting of ageing peripheral areas. Keller Easterling describes the infrastructural grid as:
"… thick with technologies that are potential multipliers: populations of suburban houses, skyscrapers, vehicles, spatial products, zones, mobile phones, or global standards."
In this sense the suburbs are a “zone”. And suburbanisation is a horizontal division of labour, a giant production grid, a gargantuan spatial factory floor spread across city and society. And networked infrastructures enable it.
Infrastructure connects and excludes
With fragmentation come inequality and marginalisation – access to and exclusion from suburban infrastructures. The global suburb is a place of extremes. High levels of unevenness in the availability of infrastructures reflect and intensify this.
Infrastructure issues are exacerbated in the suburbs. Several of their characteristics contribute to this situation: their recent nature, rapid development, economic polarisation and sprawling nature.
The infrastructure deficit in suburban areas results from the combined effects of accelerated suburban growth and insufficient funding. The latter reflects difficult economic circumstances and the predominance of other public sector expenditure priorities.
Infrastructure deficiencies are most severe in informal settlements. Governments largely overlook their needs, and the acute poverty of residents prevents reliance on locally funded infrastructure programs. The shortage or absence of water and sanitary infrastructures contributes to low health and longevity indicators.
Confronted with the need to overcome multiple forms of infrastructure difficulties, the suburbs are a likely source of urban infrastructure innovation and fertile spawning grounds for new solutions. We thus expect the future of urban infrastructures to emerge from the suburbs.
The impetus is great for infrastructure innovations to fill the gap between need and availability and overcome the inappropriateness of prevailing systems. In this sense, suburbs can be seen as laboratories for new infrastructure.
Pierre Filion is professor, School of Planning, University of Waterloo and can be contacted <a href="https://theconversation.com/profiles/pierre-filion-342838" target="_blank">here</a>.
Roger Keil is York Research chair in Global Sub/Urban Studies, York University, Canada and can be contacted <a href="https://theconversation.com/profiles/roger-keil-342841" target="_blank">here</a>.
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Why suburban tensions and inequality will drive infrastructure innovation

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GUEST OBSERVER
The proposed new suburb on the Northern Beaches will help provide additional housing supply, but lacks tall buildings, particularly in the town centre. 
The new suburb of Ingleside on the Northern Beaches with its 3,400 new homes is a welcome addition to Sydney’s housing supply.
But the Urban Taskforce is concerned that there appear to be no buildings higher than 3 storeys.
New town centres in Western Sydney, like Oran Park, have heights of 6 and 8 storeys in their town centres to provide a diversity of housing types. It is important that all parts of Sydney pull their weight in terms of providing new housing as Sydney’s population grows. The government must get the right density and height upfront as it is very hard to change the built form after it is constructed.
The general approach to a green, environmentally sensitive, suburb can lead to excellent life styles and we understand that sensitive land like that at Ingleside will need to be managed carefully. This can still be done with taller buildings as this can limit the spread of dwellings across the landscape.
The Ingleside strategy will include a component of 5-10 percent affordable housing however the documents have not provided information on how a proposed target will be calculated. The requirement to provide affordable housing will increase the costs of developing this site, and it is essential that these additional costs do not deter developers and investors from developing and investing in Ingleside. 
Chris Johnson is chief executive officer of property development industry group Urban Taskforce and can be contacted <a href="https://www.urbantaskforce.com.au/index.php?option=com_content&amp;view=article&amp;id=97&amp;Itemid=126#.Vdaart55dFI" target="_blank">here</a>.
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