The US Federal Aviation Administration (FAA) has unveiled a $5.2bn expansion plan for Philadelphia International Airport in the US.
The expansion is expected to be carried over the coming 12 to 15 years to accelerate the airport's growth and reduce delays.
If approved, the proposed expansion will lengthen two of the airport's four runways and build a fifth runway along the Delaware River, according to the Philadelphia Inquirer.
The expansion, named as Alternative A, will include lengthening runway 8-26 east by 2,000ft to 7,000ft, extending runway 9R-27L east by 1,500ft, and renaming a 12,000ft runway 9C-27C.
It will also include building a new 9,103ft runway, to be named 9R-27L, on the Delaware River.
Other works will include expanding the terminal complex from 120 to 150 gates and a new commuter terminal east of Runway 17-35.
Construction costs will be paid through Philadelphia revenue bonds, passenger-facility charges and federal FAA grants.