A Methodology for Estimating Detailed Interarea Commodity Freight Flows from Census of Transportation Data
Center for Transportation Studies, Massachusetts Institute of Technology, 1977 - Freight and freightage - 18 pages
Algorithm for estimating volume of commodity flow not reported in Census public use tapes.
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2-digit group 4-digit group aggregated data algorithm ALKALIES APPENDIX area flows area to area Census Bureau Census of Transportation CENTER FOR TRANSPORTATION CN CN CN IN CN COMMODITY FREIGHT FLOWS commodity groups directly COMPOUNDS Computer Programs Consider 1st Consider next Allocate data is limited DEEPHOUSE YU SHENG digit commodity group distribution of commodities Fiberboard firms sampled flow data flow was reported FLOWS FROM CENSUS flows reported four-digit level freight flows comes freight transportation planning GO TO 35 inadequate for freight INTERAREA COMMODITY FREIGHT Main Program market areas MASSACHUSETTS nationally aggregated NTONS3 NUMBER ORMA Paperboard particular commodity group PIGMENTS Preprocessor production areas public use tapes reveal information specific commodities STCC3 TCODE,TTONS three-digit level flows tons tons/year Total 4-digit Total 3-digit total flow total unreported area TP STCC TRANSPORTATION DATA TRANSPORTATION STUDIES TTONS two-digit commodity group two-digit level flows unreported flow withheld on shipments YU SHENG CHIANG