The Terminal B expansion and renovation program is part of an aggressive $4 billion effort to replace LGA’s outdated and undersized Central Terminal Building. It is also the preliminary stage of the Port Authority of New York and New Jersey’s $8 billion initiative designed to transform LGA into a “unified 21st century terminal system.” When the overall program is complete, the airport will include 2.7 million square feet of facilities, with 72 gates throughout six concourses, two new arrival/departure halls connected by a Central Hall, and miles of new roadways.