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Liner Notes

The National Transportation Atlas Databases 2015 (NTAD2015) is a set of nationwide geographic databases of transportation facilities, transportation networks, and associated infrastructure. These datasets include spatial information for transportation modal networks and...

National Transportation Atlas Databases 2015

Appendix E. Sample Questionnaire Instructions and Form

The sample questionnaire instructions and form are shown on the following pages.

Note: Establishments were asked to provide information about the use and extent of use of rush delivery services.

Instructions for Completing the...

Appendix D. Standard Classification of Transported Goods Code Information

The commodities shown in this report are classified using the Standard Classification of Transported Goods (SCTG) coding system. The SCTG coding system was created jointly by U.S. agencies and Canadian governments based on the Harmonized System of product classification that is used...

Appendix C. Sample Design, Data Collection, and Estimation

The primary goal for the 2012 Commodity Flow Survey (CFS) was to estimate shipping volumes (value, tons, and ton-miles) by commodity and mode of transportation at varying levels of geographic detail. A secondary objective was to estimate the volume of shipments moving from...

Appendix B. Reliability of the Estimates

The estimates presented by the 2012 CFS may differ from the actual, unknown population values. The difference between the estimate and the population value is known as the total error of the estimate. When describing the accuracy of survey results, it is convenient to...

Appendix A. Comparability With the 2007, 2002, 1997, and 1993 Commodity Flow Surveys

The following tables show a comparison of the commodity classification system, industry coverage, sample size, sample weeks, reported mode of transportation, and data items requested for each shipment among the 1993, 1997, 2002, 2007, and 2012 Commodity Flow Surveys (CFS).

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2012 Commodity Flow Survey

The Commodity Flow Survey (CFS) is a joint effort by the Bureau of Transportation Statistics (BTS) and the U.S. Census Bureau, U.S. Department of Commerce. The survey is the primary source of national and state-level data on domestic freight shipments by establishments in mining...