ACTIVITY-ACCESSIBILITY MODELS OF TRIP GENERATION

Abstract

THIS PAPER EXAMINED THE EFFECT OF ACTIVITY- ACCESSIBILITY VARIABLES ON TRIP GENERATION. A SECOND ASPECT OF ACCESSIBILITY WAS STUDIED BY STRATIFYING THE ZONES OF THE STUDY AREA BY LOCATION. DATA FROM THE TRANSPORTATION STUDY IN INDIANAPOLIS WERE USED TO DEVELOP 4 SETS OF TRIP-GENERATION REGRESSION EQUATIONS FOR EACH OF 13 TRIP PURPOSES. A COMPARISON OF THE DEVELOPED MODELS REVEALED THAT LOCATION ALWAYS IMPROVED THE STATISTICAL STRENGTH OF THE TRIP-GENERATION MODELS AND RELATIVE ACCESSIBILITY VARIABLES IMPROVED THE STATISTICAL STRENGTH OF TRIP-ATTRACTION MODELS MORE THAN THAT OF TRIP-PRODUCTION MODELS. STRATIFICATION ALONE IMPROVED THE MODELS MORE THAN RELATIVE ACCESSIBILITY VARIABLES ONLY. 1985 FORECAST OF DEMOGRAPHIC, SOCIOECONOMIC, AND LAND USE VARIABLES TOGETHER WITH ESTIMATES OF TRAVEL TIME ON THE PROPOSED FUTURE NETWORK WERE INPUTS TO THE 4 SETS OF DEVELOPED MODELS TO FORECAST TRIP PRODUCTIONS AND ATTRACTIONS. MORE TRIPS FOR ZONES OF THE NONCENTRAL AREA AND FEWER TRIPS FOR ZONES OF THE CENTRAL AREA WERE FORECAST BY STRATIFIED MODELS THAN BY UNSTRATIFIED MODELS. /AUTHOR/

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