ANALYSIS AND USE OF 1980 URBAN TRANSPORTATION PLANNING PACKAGE IN THE DELAWARE VALLEY REGION

The 1980 Urban Transportation Planning Package (UTPP) for the Delaware Valley region is analyzed with special emphasis on journeyto-work trips, employment, mode of transportation to work, car ownership, employed persons, and other socioeconomic data essential to transportation planning and travel forecasting. A review of the UTPP computer tapes and data showed some programming, sampling, and bias problems, which were resolved before the data were used as a base for trend analysis, traffic simulation, highway and transit project studies, strategic planning, and economic development. The trip information should be adjusted before it can be used for transportation planning. The errors in the 1980 UTPP data are generally small and the package shows a significant improvement over the 1970 UTPP. Most of the 1980 UTPP problems can be avoided in the future if the recommendations made in this paper and by other interested planning agencies are considered in the 1990 census.