This is adynamic list and may never be able to satisfy particular standards for completeness. You can help byediting the page to add missing items, with references toreliable sources.
This is alist of megaprojects within the transport sector. Take care in comparing the cost of projects from different times—even a few years apart—due toinflation; comparingnominal costs without taking this into account can be highly misleading. Note that inflation-calculated values are current as of 2024[update].
According to theOxford Handbook of Megaproject Management in 2017, "Megaprojects are large-scale, complex ventures that typically cost $1 billion or more, take many years to develop and build, involve multiple public and private stakeholders, are transformational, and impact millions of people."[1]
A new motorway project nearLouisville, Kentucky. Major works included two new bridges across theOhio River; a short tunnel section; and reconstruction of interchange ramps.
Locations of planned California High-Speed Rail route. Phase I: black; Phase II: dark blue. (The separateBrightline West system is shown in light blue.) Route is approximate in some places.
The map of the Suburban Rail Loop East (Lime Green) placed on top of the Victorian Train Map post Metro Tunnel along with SRL North and SRL West (Grey and Purple)
Map showing the extension along Broadway in relation to existing lines and surface streets
Cost estimated in May 2021 to be 2,830,000,000Canadian dollars; in roughly May 2021, that was roughly equivalent to 2,350,000,000United States dollars.
^The project includes terminal lobby renovation, an international arrivals facility (including six new international gates and a new Customs and Border Protection area), a new tarmac terminal apron and taxilane expansion, an on-airport hotel and corresponding garage, a satellite concourse, the creation of Concourse D, multiple new terminal garages, and roadway updates to accommodate the changes.
^The project includes expanding multiple concourses, as well as constructing a new air freight building, making terminal roadway improvements, and making baggage system handling improvements.
^Flyvbjerg, Bent; Bruzelius, Nils; Van Wee, Bert (2008). "Comparison of Capital Costs per Route-Kilometre in Urban Rail".European Journal of Transport and Infrastructure Research.8 (1):17–30.SSRN2237995. See p. 22.
^"Paris Line 14".Transit Costs Project. Marron Institute (NYU). August 31, 2020.Archived from the original on November 27, 2024. RetrievedMarch 28, 2023.
^"Costi e finanziamenti" [Costs and funding].M4 (in Italian). MM S.p.A. April 17, 2020.Archived from the original on September 15, 2024. RetrievedFebruary 4, 2023.
^Netto, João Pedro (October 30, 2018)."Transamazônica: faraônico atoleiro".Aventuras na História (in Brazilian Portuguese).Archived from the original on December 11, 2025. RetrievedNovember 30, 2025.
^Meyer, Eugene L. (September 30, 2013)."The Road Less Traveled".Bethesda Magazine.Archived from the original on August 11, 2025. RetrievedDecember 10, 2025.
^"Grand Paris Express : une estimation des coûts en hausse" [Grand Paris Express: an increase in cost estimates].Vie publique (in French). Direction de l'information légale et administrative. November 6, 2020.Archived from the original on January 28, 2025. RetrievedJanuary 27, 2023.
^"Lima Line 2".Transit Costs Project. Marron Institute (NYU). August 31, 2020.Archived from the original on January 25, 2025. RetrievedJanuary 26, 2023.
^Akhtar, Syed Ali Shahbaz; Oftedahl, Cathrine; Morsund, Gunnar (November 20, 2020)."Regjeringen klar for å gå videre med Rogfast" [The Government is Ready to Move Forward with Rogfast].NRK (in Norwegian).Archived from the original on December 2, 2024. RetrievedDecember 26, 2020.
^"Aéroport de Paris – Charles de Gaulle".Les Aéroports Français, Statistiques annuelles (in French). Paris: Union des aéroports Français.Archived from the original on December 3, 2024. RetrievedJanuary 21, 2023.