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남궁문,서승환 圓光大學校 環境建設硏究所 1995 環境建設論文集 Vol.4 No.-
Driving Behaviors in car-following are affected by not only the factors related to road structure, road environment and traffic condition, but also the factors related to drivers' cognition for visible Information. In this paper is to study the relation of drivers' cognitive response for visible Information that is speed and density. The experiments are tried that driving maneuvers are directly observed by video recorders sets on the vehicle and the driver is interviewed about his recognized degree of speed and density. And then, data obtained from this experiment is dealt together with numeral data of visual traffic condition to compare the difference among drivers and to derive the factors of drivers' cognition. As a result, the characteristics difference of cognition among drivers' is recognized.
남궁문,성수련,서승환,김금규 圓光大學校 環境建設硏究所 1997 環境建設論文集 Vol.6 No.-
In this paper the analysis is carried out with stated preference panel data. Increasing attention has devoted in recent years to dynamic analysis of travel demand analysis using data sets that consist of observations made on the same set of individuals repeatedly over time. The prevailing approach to demand forecasting is based on models estimated on cross-sectional data. This practice assumes that variations in stated preference observed across individuals within a cross-section can be extrapolated longitudinally to predict changes in each individuals stated preference over time. But changes in stated preference take place over time. In the paper's focus is the estimation of dynamic model. I incorporate serial correlation and state-dependence in SP dynamic model.