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Science
31 January 2025

Rising Infrastructure Inequalities Accompany Urbanization Trends

Study finds increasing disparities highlight the urgent need for equitable urban development plans.

Recent research reveals alarming trends as rising infrastructure inequalities accompany urbanization and economic development worldwide. A study published by Bhartendu Pandey, Christopher Brelsford, and Karen C. Seto examines the nuances of infrastructure access, finding pronounced disparities, especially among countries of the global south.

Urban areas are widely recognized as hubs of opportunity and economic growth, but they are also plagued by significant inequalities. The research highlights how urbanization — the increase of the urban population relative to the total population — and economic development tend to contribute to growing infrastructure disparities. This knowledge gap limits future urban planning efforts, especially as urban populations are anticipated to swell significantly.

The study synthesized satellite data collected between 2000 and 2019, analyzing infrastructure availability through nighttime lighting as proxies for urban infrastructure. Through this innovative approach, contrasting results were revealed — nations with similar levels of urbanization and economic development could experience vastly different levels of infrastructure access and quality.

"Our results suggest variations in the country-level inequality levels such...that countries with similar levels of urbanization and economic development can still have varying levels of infrastructure inequalities," the authors state. This variability points to the complexity of urban infrastructure dynamics, which are deeply intertwined with social outcomes.

Contrary to anticipated cyclical patterns typically seen with economic discrepancies, the researchers observed consistent growth patterns of infrastructure inequality. Infrastructure once developed remains largely intact; as urban areas grow, the gap between those with and without access to basic services continues to widen.

Significantly, the authors predicted which regions would face the most severe increases by 2050. Those findings indicated greater inequality increases particularly for Southeast Asia, indicating not only unintended consequences of rapid urbanization but also the alarming concentration of infrastructure resources within major urban centers.

"Increasing inequality can be a problem for urbanizing countries, as infrastructure inequalities due to their durable nature can perpetuate or amplify socioeconomic inequalities," noted the researchers. This suggests the potential danger as countries rush toward urbanization without implementing equitable access strategies.

They also raised concerns over the divergence of infrastructural inequalities compared to economic inequalities. The authors found: "It is evident from our findings...that infrastructure inequalities require a different approach and analytical lens than economic inequalities." This acknowledgment signals the need for nuanced policy frameworks to guide development sustainably and equitably.

Looking forward, the authors provided projections indicating which pathways could lead to exacerbated disparities. Future changes will significantly depend upon how countries implement their socio-economic development strategies. For example, planned urban transformations under the highest growth scenarios might significantly amplify existing inequalities, particularly with urban primacy potentially becoming more pronounced.

The findings draw attention to the urgent need for decision-makers to prioritize spatial equity when planning infrastructure expansions. The authors concluded with: "Future changes in inequality will depend upon the socio-economic development pathways...with greater extents compared to other regions." This highlights the potential trade-off between urbanization's efficiency and equity gains — where improved infrastructure may only benefit certain urban populations more than others.

To address these disparities effectively, the authors recommend proactive and intentional urban planning strategies emphasizing equitable infrastructure access. Such initiatives will be key to achieving sustainable development goals and ensuring cities do not become increasingly segregated landscapes of opportunity.