Megaproject
extremely large-scale construction and investment project typically costing over $1 billion, involving complex logistics, multiple stakeholders, and long implementation timelines; includes transport corridors, dams, airports, and urban developments
A megaproject is an extremely large-scale investment project.
They can be defined as "temporary endeavours (i.e. projects) characterised by: large investment commitment, vast complexity (especially in organisational terms), and long-lasting impact on the economy, the environment, and society".
Megaprojects may refer to construction projects but also decommissioning projects with multi-billion budgets, and a high level of innovation and complexity, affected by a number of techno-socio-economic and organizational challenges.
Definition and examples
According to Alan Altshuler in 2003 megaprojects could be defined as "initiatives that are physical, very expensive, and public".
In 2020 the EU defined it as an extremely large-scale investment project. A more general definition is "Megaprojects are temporary endeavours (i.e. projects) characterised by: large investment commitment, vast complexity (especially in organisational terms), and long-lasting impact on the economy, the environment, and society".
Typical hallmarks of megaprojects include: large project size, uniqueness, and complexity.
Megaprojects may refer to construction projects and also decommissioning projects with multi-billion budgets, and a high level of innovation and complexity, affected by a number of techno-socio-economic and organizational challenges.
This brief starts where responsible research should: with the source description of “Megaproject” as extremely large-scale construction and investment project typically costing over $1 billion, involving complex logistics, multiple stakeholders, and long implementation timelines; includes transport corridors, dams, airports, and urban developments. Everything that follows is an evidence route, not borrowed authority.
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The subject matters to the general reference register because the source frames it as extremely large-scale construction and investment project typically costing over $1 billion, involving complex logistics, multiple stakeholders, and long implementation timelines; includes transport corridors, dams, airports, and urban developments. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Aug 12, 2026. The linked authority identifier is Q2475641. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2003 and 2020.
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This entry incorporates text from “Megaproject” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.