A second airport is needed to alleviate growing flight delays at Hartsfield International Airport - the nation's second busiest - and maintain the city's position as an international business hub, planners said.

A report by the metropolitan area's main civic planning organization, the Atlanta Regional Commission, calls for construction of a second $2 billion airport, a $140-million commuter runway at Hartsfield and an additional $23 million in improvements.By all projections, the new airport could not be built before 2010, Atlanta Regional Commission planners predicted in a report released Friday. The report, which caps two years of study funded by a Federal Aviation Administration grant, said current delays at Hartsfield cost airlines and travelers a half-billion dollars a year.