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http://dx.doi.org/10.12815/kits.2019.18.2.44

Developing a Latent Class Model Considering Heterogeneity in Mode Choice Behavior : A Case of Commuters in Seoul  

Kim, Sung Hoo (School of Civil and Environmental Engineering, Georgia Institute of Technology)
Choo, Sangho (Dept. of Urban Design & Planning, Hongik University)
Publication Information
The Journal of The Korea Institute of Intelligent Transport Systems / v.18, no.2, 2019 , pp. 44-57 More about this Journal
Abstract
It is crucial to understand how people make decisions on mode choice and to accurately predict their behaviors in transportation planning. One of avenues for advancing modeling is, in particular, taking into account for taste heterogeneity in modeling that can incorporate different decision-making processes across group. In this study, we hypothesize that how people make decisions on mode choice would differ by destination in that land use characteristics are heterogeneous by zone even if zones are all in the same area. To this end, we apply Latent Class Modeling (LCM) to commute trips in Seoul by using 2010 household travel diary survey, investigate types of latent classes with the aid of characteristics of destination, and analyze how those classes differently response to factors. The LCM identifies two classes: in the first one, modal split of auto and public transit (bus and metro) is almost half-and-half and the trip destinations are characterized by relatively more residence facilities and less business/commercial facilities; in the second one, public transit has a notably high share and trip destinations are characterized by relatively more business/commercial facilities. In addition, it turns out that demographic and socio-economic variables affect mode choice differently by class.
Keywords
Taste heterogeneity; Mode choice; Latent class model; Household travel survey; Commute trips;
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