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Estimating Travel Demand by Using a Spatial-Temporal Activity Presence-Based Approach  

Eom, Jin-Ki (한국철도기술연구원)
Publication Information
Journal of Korean Society of Transportation / v.26, no.5, 2008 , pp. 163-174 More about this Journal
Abstract
The conventional four-step travel demand model is still widely used as the state-of-practice in most transportation planning agencies even though it does not provide reliable estimates of travel demand. In order to improve the accuracy of travel demand estimation, implementing an alternative approach would be critical as much as acquiring reliable socioeconomic and travel data. Recently, the role of travel demand model is diverse to satisfy the needs of microscopic analysis regarding various policies of travel demand management and traffic operations. In this context, the activity-based approach for travel demand estimation is introduced and a case study of developing a spatial-temporal activity presence-based approach that estimates travel demand through forecasting number of people present at certain place and time is accomplished. Results show that the spatial-temporal activity presence-based approach provides reliable estimates of both number of people present and trips actually people made. It is expected that the proposed approach will provide better estimates and be used in not only long-term transport plans but short-term transport impact studies with respect to various transport policies. Finally, in order to introduce the spatial-temporal activity presence-based approach, the data such as activity-based travel diary and land use based on geographic information system are essential.
Keywords
Activity-Based Approach; Activity Presence-Based Approach; Spatial-temporal Activity; Travel Demand; activity Capacity;
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