The report presents the forecasts of Instrument Flight Rule (IFR) aircraft handled by FAA air route traffic control centers (ARTCC). It serves as a base for the FAA planning and budget process in determining future requirements for facilities, equipment and manpower. The forecasts show that total aircraft handled will increase from 28.1 millions in FY 1978 to 45.6 million in FY 1990. These national total numbers along with those for the intervening years are broken down by FAA region and by each air route traffic control center in this report. (Author).

This report provides forecasts of Instrument Flight Rule (IFR) aircraft handled by Federal Aviation Administration Air Route Traffic Control Centers. The current study is an update to FAA-AVP 80-4, IFR AIRCRAFT HANDLED Forecast by Air Route Traffic Control Center, Fiscal Years 1980-1991. The forecasts serve as a base for the FAA planning and budget process in determining future requirements for facilities, equipment, and manpower. The forecasts show that total aircraft handled will increase from 37.0 million in FY 1989 to 50.6 million in FY 2005. These national total numbers along with the intervening years are broken down by FAA region and for each air route traffic control center in this report. This appendix contains a technical description of the data sources, methodology, and regression models used in the Instrument Flight Rule (IFR), aircraft activity forecasts for each Air Route Traffic Control Center. Section 2 presents an overview of the forecasting model for IFR aircraft activity. Section 3 provides a detailed description of the various data bases used in the forecasts. Section 4 allocating county data to the various ARTCCs, and estimating models to forecast IFR aviation activity. The final section presents the forecasting models for IFR departures and overs at each ARTCC. Keywords: Air carriers; General aviation; Military aviation; Aircraft operations. (kr).