Lookup NU author(s): Dr Dilum Dissanayake
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Most of the developing countries are suffering from serious transportation problems, congestion and environmental pollution for instance, with increase in travel demand. Therefore, competent implementation of new modes such as subway, LRT, MRT or even zero-emission vehicles are essentially required for a remarkable change in the level of service. In general, disaggregate demand modeling is widely applied in transport planning by using the method of discrete choice analysis which is based on the principle of utility maximization (Ben-Akiva and Lerman 1985). Although estimation of discrete choice models are basically relied on revealed preference (RP) data for actual travel behaviour, there is also a substantial interest on stated preference (SP) data which is related to hypothesized travel scenarios. SP techniques have been widely spreaded within the market research and some considerable attention was made on RP and SP combining technique in recent years. It is rather rational forestep towards the reality by improving the accuracy of parameter estimates while exploiting the advantages of both RP and SP data sources (Morikawa 1989). This study focuses on estimation with SP data and combined estimation with RP and SP data, upon the introduction of a new mode into the system. The developed SP model is verified using the data regarding the future MRT project in Bangkok. Since the mode choice and car ownership are inextricably linked, development of integrated model is important for future investigations on travel demand. Therefore, the factors influencing on car ownership under rising economic conditions are also discussed.
Author(s): Dissanayake D, Morikawa T
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: Conference of Infrastructure Planning
Year of Conference: 1999