This is a list of megaprojects within the transport sector. Care should be taken in comparing the cost of projects from different times, even a few years apart due to

inflation In economics, inflation is an increase in the general price level of goods and services in an economy. When the general price level rises, each unit of currency buys fewer goods and services; consequently, inflation corresponds to a reductio ...

; comparing nominal costs without taking this into account can be highly misleading. According to the ''Oxford 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".

Completed projects

Under construction

Proposed

Airport projects

Notes

References

{{DEFAULTSORT:List Of transport megaprojects Megaprojects * Infrastructure-related lists Megaprojects