The Port Authority of New York and New Jersey approved the $3.8 billion expansion of John F. Kennedy Intl. Airport’s busiest terminal.

Terminal 4 handled 22 million passengers last year, making it one of the busiest entry points into the U.S.

The deals are part of a planned $13 billion overhaul of the airport’s roadways, taxiways and terminals. The Port Authority has set aside $1 billion toward overhauling the airport’s central infrastructure. Private firms are expected to cover the remaining costs.