<![CDATA[Background: Infrastructure affects regional development when it changes the cost and reliability of moving people, goods, energy or information. The economic effect therefore depends not only on construction spending but on where the asset connects, how reliably it operates and whether firms can use the new capacity. Aims: This article examines the mechanisms that connect the topic to organizational or policy performance and identifies the conditions that make those mechanisms stronger or weaker. Research Method: A structured narrative review integrates peer-reviewed research with authoritative policy, statistical, and professional sources, including UN-Habitat (2024); World Bank (2026). Sources are coded by outcome, mechanism, boundary condition, and practical implication. Results and Conclusion: The synthesis indicates that outcomes are heterogeneous. Large projects are visible, but visibility is not the same as value. Infrastructure can underperform when demand forecasts are weak, maintenance is unfunded, land and social risks are mishandled or complementary local investments never arrive. Six recurring themes show that implementation quality, information, capability, and institutional context frequently matter as much as the headline policy or technology. Contribution: The article offers an evidence-based framework for regional governments, infrastructure agencies and investors that translates the literature into decision principles without claiming primary data that were not collected.]]>
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