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Title: TRAFFIC FORECASTING IN THE HELSINKI METROPOLITAN AREA TRANSPORTATION STUDY 1988
Accession Number: 00626894
Record Type: Component
Availability: Find a library where document is available Abstract: The models developed for traffic forecasting in the Helsinki Metropolitan Area, Finland, are presented. The basic traffic surveys for the Helsinki Metropolitan Area Transportation Study 1988 were done during 1987 and 1988. The main field studies were an origin-destination (OD) survey of automobile traffic, an OD survey of public transport, and a personal trip diary interview. Modeling of only internal trips made by inhabitants of the metropolitan area is described. The modeling was based on the trip diary interview. The model structure was basically a four-step model with feedback between the last three steps. Trip generation was calculated using production and attraction rates. Mode and destination choice were mostly modeled using nested logit models. In network loading, a standard multipath equilibrium assignment model (EMME/2 system) was used. Trips were divided into four categories according to trip purpose (home-based work trips, home-based school trips, other home-based trips, and non-home-based trips). Four alternative modes were included in the mode choice models. The population was divided into categories according to the different steps of the modeling. The most important categorization was the division according to a person's access to a car. Destination choice models included 117 alternative destinations. The coefficients of mode choice models were logical and the variables predictable. The first destination choice models had some theoretical deficiencies, which were partly abolished using constrained estimation. The model system with unconstrained models produced satisfactory forecasts. New models will be estimated and new forecasts will be made during 1992.
Supplemental Notes: This paper appears in Transportation Research Record No. 1357, Travel Demand Forecasting, Travel Behavior, and Telecommunications. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
Monograph Title: Travel demand, forecasting, travel behavior, and telecommunications Monograph Accession #: 01405035
Language: English
Authors: Pursula, MattiKanner, HeikkiPagination: p. 29-39
Publication Date: 1992
Serial: ISBN: 0309052211
Features: Figures
(1)
; References
(12)
; Tables
(9)
TRT Terms: Uncontrolled Terms: Geographic Terms: Subject Areas: Planning and Forecasting; Transportation (General); I72: Traffic and Transport Planning
Files: TRIS, TRB
Created Date: Feb 19 1993 12:00AM
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