Summary of National Transportation Statistics 1972
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1972-11-01
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Alternative Title:National Transportation Statistics
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Abstract:This publication contains summaries of selected national transportation statistics. The summaries are of three types: tree displays, modal profiles, and transportation trends. The data base from which the summaries have been drawn consists of time-series covering the years 1960 through 1970. Data summarization involves the selection of certain statistics from the data base and displaying them in such a fashion that comparisons of transportation measures and trends can be made easily. The first step in this process is to place the selected data in a logical framework. ln general, the data can be divided Into three· main categories: cost, inventory, and performance.
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Content Notes:National Transportation Statistics was formed by the union of: United States. Department of Transportation. Office of the Assistant Secretary for Policy, Plans, and International Affairs. Summary of national transportation statistics; and: Energy statistics.
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