• Title/Summary/Keyword: HC3(Heteroscedasticity Consistent) model

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Analysis on Passenger Car Travel Characteristics by Household Type (자가용 승용차의 가구그룹별 통행특성 차이에 관한 연구)

  • Joo, Jin Ho;Yeon, Ji Youn;Jang, Dong Ik
    • Journal of Korean Society of Transportation
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    • v.32 no.4
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    • pp.347-356
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    • 2014
  • Passenger cars occupy about 74% among registered vehicles in Korea and the ratio of transportation mode sharing is approximately 60% in the passenger transport part. However, there is no statistics related to travel characteristics of passenger cars, and official statistics are estimated from O/D travel data. Thus, National Transportation DataBase Center in KOTI has attempted to construct various statistical data through Korea Vehicle Use Survey. Based on these data, Analysis of Variance (ANOVA) was conducted to investigate the differences in travel characteristics of each analysis group. As a result, all of the explanatory variables(weekday vs. weekend, metropolitan area vs. non-metropolitan area, male vs. female, commute time vs. other time, routine purpose vs. non-routine purpose) were found to be different across households. In addition, travel distances per trip of weekday, metropolitan area, male, commute time, and non-routine purpose are longer than the opposite variables. Also, the trip distances of small size(1 to 2 persons) households are shorter compared to large size(more than 5 persons) households.