CONCEPTS AND PROCEDURES USED IN TABULATING 1970-CENSUS DATA FOR THE URBAN TRANSPORTATION PLANNING PACKAGE

In response to the request from many Urban Transportation Studies for 1970-census place-of-work data, the Federal Highway Administration submitted tabulation specifications to the Bureau of the Census for the compilation of both socioeconomic and journey-to-work data from the 15 and 20 percent sample data (Appendix C in this paper explains the sample design) for traffic zones in standard metropolitan statistical areas. The standardized tabulations contained in this 1970-census Urban Transportation Planning Package (UTPP) were designed to provide a common data base for transportation studies in the country and reduce processing costs for such tabulations. This paper focuses on the concepts of the 1970 Census of Population and Housing as they relate to the UTPP, the procedures used to code the place-of-work data for the 15 percent sample, the processing steps involved in tabulating these data by traffic zone, and the limitations of these data for use in the transportation planning process.