00458283

Component

http://onlinepubs.trb.org...trr/1985/1038/1038-012.pdf

https://scholar.google.co...bins&publication_year=1985

Carload waybill statistics as collected by the Interstate Commerce Commission and the Federal Railroad Administration have been the primary data source on railroad commodity flows for more than three decades, and a considerable amount of geographic research during that time period has made use of these data. Using recently released carload waybill data at the freight station level and actual flow data for the Penn Central, Norfolk and Western, and Southern railroads, a statistical comparison of the two data sets is undertaken. On the basis of correlation coefficients the waybill sample does a good job of estimating the universe. However, an examination of the standard errors indicates values large enough to cause some concern.

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01419423

pp 85-89

1985

Transportation Research Record

0309039541

Print

References (23) ; Tables (4)

Accuracy; Coefficients; Commodity flow; Correlation analysis; Data collection; Freight transportation; Railroad transportation; Statistical sampling

Data sources

Data and Information Technology; Freight Transportation; Highways; Planning and Forecasting; Railroads; I72: Traffic and Transport Planning

TRIS, TRB

Sep 30 1987 12:00AM

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