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CHAPTER 10 Cargo Surveys The modern airport is a hub not only for passengers but also for air cargo. As the world con- tinues to shrink, and demand for faster transportation of goods, as well as people, continues to grow, the volume of air cargo will rise accordingly. This chapter discusses typical target populations for air cargo surveys, such as air cargo opera- tors and freight forwarders, and the key factors relevant to cargo surveys. Note that air cargo is not restricted to dedicated aircraft, as considerable volume is carried in the belly holds of passenger air- craft, particularly on international flights. 10.1 Need for Air Cargo Data The cargo activity at an airport generates a requirement for dedicated terminal and apron facil- ities as well as producing truck traffic, both within the airport boundaries and on the surrounding road system. One purpose of collecting air cargo data is to forecast the amount of cargo activity in order to determine future facility requirements. A second purpose is to develop a relationship between the air cargo tonnages and the resulting truck traffic, both volumes as well as temporal and geograph- ical trip patterns. The latter encompasses the immediate road system of the airport itself, as well as the connections to the major highways throughout the region. Metropolitan planning organiza- tions should include the airport as a generator of both truck and passenger traffic in their plans and forecasts. While the purpose of an air cargo survey can be clear, there is little experience with collecting data in this area. Considering the increasing importance of air cargo on the world economy--and the lack of experience in the conduct of air cargo studies and the collection of air cargo data--there is a requirement for research in this area. 10.2 Collection of Air Cargo Data The tonnage of air cargo handled at an airport is the starting point for both facility and munic- ipal planning purposes, but other information about the characteristics of the cargo is also required. It should be noted that cargo activity at an airport is not necessarily all air cargo. A cargo consoli- dation facility is sometimes located at the airport to serve an air cargo function as well as a freight consolidation and transfer function between other modes, including truck-to-truck transfer. International--and to some extent national--air cargo flows are influenced by the volume of passenger activity between particular airports, because passenger volume affects the size of air- 142