AN EVALUATION OF INDUCED TRAFFIC ON NEW HIGHWAY FACILITIES

FUTURE TRAFFIC ON A NEW HIGHWAY FACILITY CAN BE DIVIDED INTO THE FOLLOWING COMPONENTS FOR ANALYSIS AND FORECASTING: (1) DIVERTED - TRIPS CURRENTLY BEING MADE ON OTHER ROADS; (2) CONVERTED - TRIPS NOT MADE BY OTHER MODES; (3) GROWTH - INCREASED TRAFFIC DUE TO POPULATION GROWTH, WITH TRIP GENERATION RATES HELD CONSTANT; (4) DEVELOPED - INCREASED VOLUMES CAUSED BY CHANGES IN LAND USE IN THE TRAVEL CORRIDOR; (5) CULTURAL - CHANGES (INCREASES) IN TRIP GENERATION RATES RESULTING FROM CHANGES IN SOCIOECONOMIC CHARACTERISTICS OF THE POPULATION; AND (6) INDUCED - NEW TRIPS MADE BECAUSE OF THE ADDED CONVENIENCE OR INCREASED ACCESSIBILITY AFFORD BY THE NEW FACILITY. MOST SURVEY AND FORECASTING TECHNIQUES ACCOUNT FOR THE FIRST FOUR, AND SOME FOR THE FIFTH, BUT INDUCED TRAFFIC HAS NOT PREVIOUSLY BEEN CONSIDERED. THE TEXAS HIGHWAY DEPARTMENT HAS CONTRACTED WITH TTI TO EVALUATE INDUCED TRAFFIC AS PART OF A THREE-YEAR STUDY THAT BEGAN IN 1971. FINDINGS TO DATE ARE REPORTED HERE. SEVERAL FACILITIES OPENED IN TEXAS IN RECENT YEARS WERE INVESTIGATED. IT WAS FOUND THAT A SIGNIFICANT FRACTION OF THE TOTAL TRAFFIC ON SOME FACILITIES WAS INDUCED, WHEREAS ON OTHERS THIS WAS NOT THE CASE. CRITERIA ARE DEVELOPED FOR EVALUATING THE POTENTIAL FOR INDUCED TRAFFIC ON PLANNED FACILITIES, AND A PROCEDURE IS RECOMMENDED FOR INCORPORATING INTO EXISTING TRAFFIC FORECASTING PROCEDURES AN ESTIMATE OF INDUCED TRAFFIC.

  • Supplemental Notes:
    • RR 167-5 37 PP
  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  United States  76011
  • Authors:
    • HOLDER, R W
    • Stover, V G
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00228225
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jun 12 1973 12:00AM