<P> The airport today employs about 55,300 airline, ground transportation, concessionaire, security, federal government, City of Atlanta and Airport tenant employees and is the largest employment center in Georgia . With a payroll of $2.4 billion, the airport has a direct and indirect economic impact of $3.2 billion on the local and regional economy and an annual, regional economic impact of more than $19.8 billion . Since the opening of Concourse F in May 2012, the airport now has 200 gates which is the most at any airport . </P> <P> In December 2015, the airport became the first airport in the world to serve 100 million passengers in a year . </P> <P> In 1999, Hartsfield--Jackson's leadership established the Development Program: "Focus On the Future" involving multiple construction projects with the intention of preparing the airport to handle a projected demand of 121 million passengers in 2015 . The program was originally budgeted at $5.4 billion over a ten - year period, but the total is now revised to be at over $9 billion . </P> <P> The Hartsfield--Jackson Rental Car Center, which opened December 8, 2009, houses all ten airport rental agencies with capacity for additional companies . The complex features 9,900 parking spaces split between two four - story parking decks that together cover 2,800,000 square feet (260,000 m), a 137,000 - square - foot (12,700 m) customer service center, and a maintenance center for vehicles that features 140 gas pumps and 30 wash bays equipped with a water recovery system . An automated people mover, the ATL SkyTrain, runs between the rental car center, the Domestic Terminal, and the Gateway Center of the Georgia International Convention Center, while a four - lane roadway that spans Interstate 85 connects the rental car center with the existing airport road network . </P>

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