URBAN TRANSPORTATION PLANNING' TRAFFIC ESTIMATION

THE NEED FOR COMPREHENSIVE TRANSPORTATION PLANNING IS DUE TO RAPID GROWTH IN URBAN POPULATION AND INCREASING PERSONAL INCOMES COMBINED WITH UNSATISFACTORY CONDITIONS FOR BOTH CAR AND TRANSIT TRAFFIC. THE MAIN STEPS IN THE METHODOLOGY USED IN COMPREHENSIVE TRANSPORTATION PLANNING ARE THE FOLLOWING' /1/ DATA COLLECTION, /2/ DEVELOPMENT OF RELATIONSHIPS, /3/ DETERMINATION OF FUTURE LAND USE, CAR OWNERSHIP, ETC., /4/ PROPOSALS FOR THE FUTURE TRANSPORTATION SYSTEM, /5/ CALCULATION OF FUTURE TRAFFIC FLOWS, AND /6/ EVALUATION OF PROPOSALS FOR FUTURE TRANSPORTATION SYSTEM. THIS OUTLINE FOR THE URBAN TRANSPORTATION PLANNING PROCESS IS DISCUSSED, AND A GENERAL DESCRIPTION GIVEN OF THE FOUR PHASES IN THE TRAFFIC ESTIMATION PROCEDURE' TRIP GENERATION, TRIP DISTRIBUTION, MODAL SPLIT AND TRAFFIC ASSIGNMENT. A PARTICULAR TRAFFIC ASSIGNMENT PROGRAM DEVELOPED AND TESTED BY THE AUTHOR WAS DESCRIBED.