An Airport Whose Time May Not Come: "Jeffrey M. Zupan, an analyst with the Regional Plan Association who led the study, said he forecast that Stewart would draw only about half the traffic the Port Authority hoped for. By the time the four airports controlled by the Port Authority are drawing 150 million passengers a year, only about 3.5 million of them, or just over 2 percent, will be using Stewart, Mr. Zupan said"