EVALUATING THE CENTRAL CITY ACCESS OPPORTUNITY PROVIDED BY A PUBLIC TRANSPORTATION SYSTEM-RESEARCH REPORT NO 1

THE REPORT DEVELOPS AND TESTS A METHODOLOGY TO MEASURE THE ACCESS OPPORTUNITIES AFFORDED TO URBAN RESIDENTS BY A PUBLIC TRANSPORTATION SYSTEM. ACCESS OPPORTUNITY IS DEFINED AS "THE OPPORTUNITY FOR A TRIP MAKER TO PROFIT FROM A TRANSIT SYSTEM IN TRAVELING BETWEEN ORIGIN AND DESTINATION THROUGH TIME AND COST SAVINGS." THREE BASIC OBJECTIVES OF THE RESEARCH WERE TO: (1) DEVELOP A METHODOLOGY TO MEASURE THE ACCESS OPPORTUNITY FOR ANY URBAN RESIDENT TO REACH A DESTINATION VIA THE PUBLIC TRANSIT SYSTEM; (2) DEVELOP A MORE PRECISE IDENTIFICATION OF THE INDEPENDENT VARIABLES AFFECTING TRANSIT TRAVEL COSTS; AND (3) INVESTIGATE THE FEASIBILITY OF DEVELOPING AN AREAWIDE QUERY-TYPE SYSTEM THAT COULD BE USED BY ANY INTERESTED PERSON IN ASSESSING HIS PARTICULAR TRANSIT CONVENIENCE. THE SEATTLE, WASHINGTON, CBD WAS SELECTED FOR THE CASE STUDY. TWO UNIQUE DIFFERENCES BETWEEN THE PRESENT REPORT AND EARLIER RESEARCH ARE THAT PRIOR STUDIES EMPHASIZED CORRIDORS RATHER THAN BLOCKS, AND NONE OF THE EARLIER RESEARCH EMPLOYED THE QUERY-TYPE SYSTEM FOR COMMUNICATING BENEFITS OF PUBLIC TRANSIT TO CENTRAL CITY RESIDENTS. AN ALGORITHM FOR ESTIMATING TOTAL TRAVEL TIME AND COSTS WAS DEVELOPED AROUND FIVE INDEPENDENT VARIABLES REPRESENTING TRAVEL TIME COSTS ASSOCIATED WITH EACH SEGMENT OF A POINT-TO-POINT TRIP. ALTERNATIVE TRANSIT NETWORK CONFIGURATIONS ARE ASSESSED; IN THE SEATTLE CASE STUDY, THESE ENCOMPASSED AN EXISTING BUS SYSTEM AND A PROPOSED RAIL RAPID TRANSIT ROUTE. THE METHODOLOGY WAS TESTED FOR TRIPS BETWEEN THE SEATTLE MODEL CITIES AREA AND THREE PRINCIPAL TRIP GENERATORS IN THE METROPOLITAN AREA. ACCESS OPPORTUNITIES AFFORDED TO TRAVELERS ON BOTH MODES WERE QUANTIFIED. ALL RELEVANT DATA ARE PROVIDED. IT IS CONCLUDED THAT A RAPID RAIL SYSTEM WILL PROVIDE ONLY A MARGINAL INCREASE IN ACCESS OPPORTUNITIES FOR CENTRAL AREA RESIDENTS BECAUSE OF HIGH RELATIVE TRANSFER TIME COSTS AND THAT THE BUS MODE IS COMPETITIVE WITH THE PROPOSED RAIL SYSTEM FOR TRIP LENGTHS OF UP TO THREE MILES. /UMTA/

  • Supplemental Notes:
    • PROJ NO URT-16
  • Corporate Authors:

    University of Washington, Seattle

    Seattle, WA  USA  98195
  • Authors:
    • Sweek, J E
  • Publication Date: 1970

Subject/Index Terms

Filing Info

  • Accession Number: 00241937
  • Record Type: Publication
  • Source Agency: Urban Mass Transportation Administration
  • Files: TRIS, USDOT
  • Created Date: Nov 7 1972 12:00AM