ECONOMETRIC MODEL FOR DOWNTOWN WORK TRIPS

THE MODELS ARE DESIGNED TO DIRECTLY PREDICT ZONES-TO ZONE TRIPS BY MODE, AND TO PROVIDE ESTIMATES ON THE ELASTICITY OF TRAVEL DEMAND WITH RESPECT TO SEVERAL TRANSPORTATION SYSTEM VARIABLES. BUS AND RAIL TRAVEL DEMAND MODELS ARE ESTIMATED; DEMAND MODELS FOR AUTO TRIPS COULD NOT BE ESTIMATED DUE TO THE LACK OF AUTO TRIP DATA. THE NUMBER OF INTERZONAL TRIPS TO AND FROM WORK IS POSTULATED TO BE DEPENDENT ON THREE SETS OF VARIABLES: TRAVEL TIMES AND TRAVEL COSTS, OR THEIR COMPONENTS ON EACCH THREE MODES; SIZE AND SOCIOECONOMIC CHARACTERISTICS OF THE LABOR FORCE IN EACH TRAFFIC ORIGIN ZONE; AND THE NUMBER OF JOBS IN THE DESITNATION TRAFFIC ZONE. THE FORECASTING ACCURACY OF THE MODELS IS STUDIED FROM TWO VANTAGE POINTS: MATHEMATICAL FORM OF THE DEMAND EQUATION, AND LEVEL OF SEGMENTATION OF TRIP TIMES AND TRIP COSTS INTO THEIR COMPONENTS. THE RESULTS SHOW THAT A MIXED MATHEMATICAL FORM THAT CAN ACCOUNT FOR BOTH RELATIVE AND ABSOLUTE EFFECTS OF CHANGES IN EXPLANATORY VARIABLES IS SUPERIOR TO A MATHEMATICAL FORM THAT CAN ACCOUNT ONLY FOR ONE OR THE OTHER. /AUTHOR/

  • Supplemental Notes:
    • Pub No 341, 031, 123 PP
  • Corporate Authors:

    Chicago Area Transportation Study

    300 West Adams Street
    Chicago, IL  United States  60606
  • Authors:
    • Talvitie, A P
  • Publication Date: 1971-12

Subject/Index Terms

Filing Info

  • Accession Number: 00202054
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 20 1972 12:00AM