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- W1485162515 abstract "The Freight Analysis Framework 3 (FAF3) is a Federal Highway Administration freight data product which provides a national origin-destination (O-D) matrix of commodity flows to, from, and within the United States. FAF3 freight flows are reported in terms of both annual tons and annual dollars of freight moved by mode of transportation. Based largely on the 2007 Commodity Flow Survey (CFS), FAF3 utilizes domestic freight flow characteristics, geographic regions, and the Standard Classification of Transported Goods (SCTG) commodity coding system from CFS. However, many freight flows were not captured by the 2007 CFS due to scope and sample size limitations. Approximately 100,000 establishments were sampled out of some 754,000 freight moving establishments in 2007 and imports are out of scope entirely. To estimate missing data values, the approach taken in FAF3 was to use a combination of a novel Log-linear modeling approach (LLM) with an iterative proportional fitting (IPF) routine that also uses additional data inputs to fill in the missing pieces. The complete FAF3 O-D–Commodity–Mode database is made up of 131 Origins x 131 Destinations x 43 Commodity Classes x 8 Modal categories, for annual tons and dollars. This study illustrates how the 2007 CFS data were integrated with several additional data sources using LLM and IPF to create a comprehensive FAF3 national freight flow matrix." @default.
- W1485162515 created "2016-06-24" @default.
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- W1485162515 date "2011-01-01" @default.
- W1485162515 modified "2023-09-23" @default.
- W1485162515 title "Overview of the FAF3 Freight Flow Matrix Construction Process" @default.
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