PROJECTING AUTOMOBILE AVAILABILITY BY URBANIZED AREA

EXTRACTIONS ARE PRESENTED FROM AN UNPUBLISHED TECHNICAL REPORT ON RESEARCH CONDUCTED IN ONE TASK UNDER THE BUREAU OF PUBLIC ROADS NATIONAL RESEARCH PROJECT, 'UNDERLYING FACTORS IN URBAN TRANSPORTATION ANALYSIS.' THE TASK IS CONCERNED WITH IMPROVING THE TECHNIQUES OF ESTIMATING FUTURE POTENTIAL DEMAND FOR HIGHWAYS. THE MOST IMPORTANT SINGLE INDICATOR OF DEMAND FOR HIGHWAY TRANSPORTATION IS AUTOMOBILE AVAILABILITY (MEASURED BY THE RATIO OF AUTOMOBILES AVAILABLE TO EMPLOYED RESIDENTS). MULTIPLE REGRESSION ANALYSES WERE MADE OF THE RELATIONSHIPS BETWEEN THE 1950 AND 1960 RATIOS OF PERCENT SHARES OF AUTOMOBILES AVAILABLE AND NINE RELATED POPULATION, EMPLOYMENT, AND INCOME VARIABLES FOR 198 URBANIZED AREAS. TESTS WERE MADE OF THE ACCURACY OF THE EQUATIONS IN PREDICTING 1960 AUTOMOBILES AVAILABLE USING 1950 AS THE BASE YEAR. THE EQUATION FOR URBANIZED AREAS IN THE TYPE A CATEGORY, ALTHOUGH NOT AS ACCURATE AS MOST OF THE OTHER EQUATIONS, PREDICTED VALUES THAT ARE WITHIN PLUS OR MINUS 15 PERCENT OF THE ACTUAL VALUES IN APPROXIMATELY TWO-THIRDS OF THE CASES. PROJECTIONS OF THE NUMBER OF AUTOMOBILES AVAILABLE IN 1975 AND 1990 WERE MADE FOR THE 28 URBANIZED AREAS CLASSIFIED AS TYPE A. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 105-116
  • Monograph Title: Transportation economics
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00201719
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Nov 24 1994 12:00AM