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Appendix A Connecting Traffic Analysis (2008) A thorough analysis of the current aviation market was undertaken in order to investigate the order of magnitude of volume of baggage recheck. A critical component of the analysis was to select the three case study locations for a detailed review of the need for baggage recheck in order to ensure that the airports represented (1) Substantive volume of traffic and (2) International best practices and trends. The data review focused on the arriving traffic volume, outbound connecting routes, and the proportionality of connecting versus terminating international arrivals. U.S. DOT's T-100 data was the primary source for the traffic analysis. The T-100 data provides the number of passengers flying into the United States on all carriers but only up to the first U.S. point of entry (i.e., CBP facility). Although this data provides an accurate number of passengers traveling on nonstop flights to the United States, it does not reflect each passenger's true destination and connection to another domestic/international flight--the focus of this proposed study. As a result, the study team applied additional sources and expert insight to determine the ratio of origin and destination (O&D) traffic relative to connecting traffic volumes, cross-referencing U.S. DOT's T-100 database and the International O&D DB1B database to InterVISTAS' analyses on connection ratios to domestic and international traffic. This data was also combined with Official Airline Guide data to estimate online alliance traffic. Ultimately, all the data sources were used to define the percentage of "onward connections" to estimate the magnitude of eliminating/ reducing baggage recheck from international arrivals by facility. O&D routing was examined to show how much, if any, of that traffic entered the United States at another point-of-entry airport for U.S. carriers. For foreign flag carriers (e.g., British Airways), there was no central data source to show connection volumes. Instead, the study team reviewed a category of data called "Domestic Portion of International Journey." By taking inbound pas- senger numbers in this category with routings that include foreign carriers for the international flight into the point-of-entry airport, the team achieved an approximation of foreign carrier local versus connecting traffic at the point-of-entry airport. The study team progressed through four criteria to filter the results down to the top 30 airports: Criteria 1: Preclearance facilities were removed to focus on the airport processes within the United States. Criteria 2: A review of the passenger services offered at the airport ports of entry in the United States showed that the critical mass of scheduled international services were offered at 54 air- ports. The other 47 airports as such did not offer sufficient services to warrant consideration to be a case study airport. A-1

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A-2Elimination or Reduction of Baggage Recheck for Arriving International Passengers Criteria 3: A further review of the data revealed that the top 30 airports receiving international arrivals also handle approximately 97 percent of passengers. Recognizing the importance of selecting case study airports that could display the magnitude of the baggage recheck issue as well as to gauge the benefits and costs that would be realized through the elimination or reduction in baggage recheck, the study team determined that airports outside the top 30 would not be case study locations. Criteria 4: Operational characteristics of the remaining 30 airports were reviewed to ensure that a range of airport systems, processes, practices, and technologies were reviewed during the case study process. This enabled the study team to best gauge the issues at hand and heightened the added value of each case study. Figures A-1 through A-3 elaborate on the study team's cur- rent thinking process for specific criteria within the operational characteristics.

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Connecting Traffic Analysis (2008) A-3 Source: T-100 onboard & DB1B O&D databases. Figure A-1. Number of international arrival passengers by Customs and Border Protection clearance status (in United States or Precleared). Top 30 international airports in the United States for calendar year 2008.

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A-4Elimination or Reduction of Baggage Recheck for Arriving International Passengers Source: T-100 onboard & DB1B O&D databases for calendar year 2008. Figure A-2. Number of international arrival passengers clearing CBP in the top 30 U.S. airports with international arrivals, ascending order by connecting passengers.

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Connecting Traffic Analysis (2008) A-5 Source: T-100 onboard & DB1B O&D databases for calendar year 2008. Figure A-3. Percentage of international arrival passengers clearing CBP in the top 30 U.S. airports with international arrivals, ascending order by number of connecting passengers.