THE SURVEY OF USER-CHOICE OF ALTERNATE TRANSPORTATION MODES

Abstract

SOME ADVANTAGES ARE OUTLINED OF AN ECONOMIC UTILITY THEORY APPROACH TO THE ESTIMATION OF DEMAND FOR ALTERNATE TRANSPORTATION SYSTEMS (MODAL SPLIT). ONE PARTICULAR ESTIMATION MODEL, DEVELOPED WITHIN GENERAL MOTORS AND BASED ON A UTILITY THEORY APPLICATION OF A STATISTICAL INFERENCE TECHNIQUE, IS EXAMINED. DISCUSSED IN DETAIL ARE THE DESIGN AND CONDUCT OF AN ATTITUDINAL SURVEY AS THE ESSENTIAL VALIDATION PHASE IN THE OVERALL DEVELOPMENT OF THIS MODEL. THE FOLLOWING STEPS ARE HIGHLIGHTED: (1) IDENTIFICATION OF THE UNDERLYING LOGIC OF THE SURVEY AS A DATA COLLECTION DEVICE (WITH RECOGNITION OF DATA INTERFACES TO APPROPRIATE STATISTICAL ANALYSIS TECHNIQUES); (2) FORMULATION OF AN ABSTRACT ATTRIBUTE SET (I.E., A SET OF SYSTEM CHARACTERISTICS) WHICH ALLOWS A SUFFICIENT DESCRIPTION OF A NEW TRANSPORTATION SYSTEM; (3) DETERMINATION AND APPLICATION OF A QUANTITATIVE METHOD TO MEASURE POTENTIAL USER ATTITUDES TOWARD A PARTICULAR SYSTEM BY MEANS OF THE ATTRIBUTE SET; AND (4) SELECTION OF ADDITIONAL DATA ABOUT THE CONSUMER'S MODAL CHOICE WHICH ARE NECESSARY FOR THE COMPREHENSIVE EVALUATION OF THIS MODEL IN COMPARISON TO OTHER MODE DEMAND ESTIMATION TECHNIQUES. /AUTHOR/

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