Sustainable urban infrastructure development demands an integrated approach to planning, design and development that includes environmental protocols as well as ecological and social indicators from early in the planning stages.
Biophilic design elements such as greenery, natural lighting and ventilation can make buildings energy efficient while decreasing their carbon footprint. Integrating renewable energy sources into urban landscapes could transform cities into carbon neutral communities.
Sustainable Planning and Management
Sustainability and environmental considerations should be an integral part of urban infrastructure projects from their inception. A holistic sustainable infrastructure approach includes green spaces as well as multimodal transport that reduces congestion and air pollution.
Efficient public transportation reduces carbon emissions and traffic congestion, making cities cleaner. Planners can design transit-oriented developments — high density neighborhoods close to bus and train stops — as well as mixed use developments, which combine commercial with residential uses.
Governance and institutional reform are central components of developing sustainable infrastructure in the Global South. Effective coordination mechanisms that bridge sectoral divisions and prioritize community participation are required to overcome any impediments to infrastructure development. For instance, political instability exacerbates water shortages and hampers progress toward Sustainable Development Goal 6 target 11.1 to provide access to affordable drinking water by 2030; further hindered by limited financial resources available. These obstacles must be tackled through advocacy work or policy modifications that increase transparency and accountability.
Form-Based Codes
CDOT has developed guidelines that incorporate sustainable best practices into all its urban infrastructure projects. The purpose is to ensure that City departments, contractors and developers use sustainability in designing and building roadways, buildings, sidewalks, parks or any other forms of urban infrastructure projects.
Form-based codes differ from conventional zoning regulations in that they utilize physical forms of structures and public spaces as their main regulating parameters and standards, rather than conventional floor area ratios and density limits as an approach to predictable physical outcomes based on development projects.
Form-based code practices were pioneered by architects and urban designers during the 1970s as they searched for physical solutions to community issues. Christopher Alexander’s A Pattern Language provided rules to guide humane buildings that are sensitive to their environment; modern form-based codes continue to evolve through Duany/Plater-Zyberk’s SmartCode first implemented in Vicksburg Mississippi and central Petaluma California.
Redevelopment of Brownfield Sites
Sustainable urban infrastructures aim to deliver high quality of life while protecting natural resources. Cities can achieve this objective by repurposing old industrial and commercial properties known as brownfields – these properties typically possess existing infrastructure that reduces redevelopment costs and timelines; additionally, reuse can help avoid sprawl development issues by diverting development onto non-prime land.
Many property owners opt out of redeveloping brownfields due to concerns over environmental liability or finding that it would be too costly. Luckily, many states offer incentives for brownfield redevelopment such as loan programs, tax benefits and liability relief that make redevelopment possible.
Redeveloping brownfields offers the chance to transform former industrial sites into vibrant residential, commercial and mixed-use communities. A prime example is Atlanta BeltLine park and trail reclaimed a once blighted brownfield site into an asset and transportation option for its community.
Green Infrastructure
Green infrastructure (GI) incorporates natural elements into urban landscapes, such as parks and green spaces, to increase environmental sustainability, promote community health, and facilitate social inclusivity. Green infrastructure also reduces stormwater runoff while improving water quality while increasing resilience against climate threats like flooding and drought.
Local governments can implement green infrastructure through various mechanisms, such as ordinances, incentives and policies that prioritize green space inclusion, multi-functionality and connectivity. Practices to promote this include street plantings, rain gardens, bio-swales, permeable pavements, green roofs, infiltration planters as well as tree and shrub planting and constructed wetlands.
Municipalities can encourage green infrastructure use through development incentives such as expedited permitting or bonus parking spaces, which can act as key drivers of change on private properties where ordinances and zoning codes may not apply as readily. Additional tools that support green infrastructure investments include municipal bonds or Clean Water State Revolving Fund funds as well as tax increment financing strategies that leverage private sector investments in green infrastructure.