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Improving Bus Travel Time Estimation and OD-based Calculation for Travel Time Saving Benefit
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버스 통행시간 정교화 추정과 기종점 기반의 통행시간 절감편익 산정

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Type
Academic journal
Author
SHIM, Jaeyeob (한양대학교) KIM, Ikki (한양대학교) YOO, Hansol (한양대학교) HAN, Keunsoo (대구경북연구원)
Journal
Korean Society Of Transportation Journal of Korean Society of Transportation Vol.39 No.3 KCI Excellent Accredited Journal
Published
2021.6
Pages
312 - 328 (17page)
DOI
10.7470/jkst.2021.39.3.312

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Improving Bus Travel Time Estimation and OD-based Calculation for Travel Time Saving Benefit
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The feasibility study for transportation facility such as trams and urban railways has been continuously utilized for decision making. Demand forecasting and benefit/cost analysis, which are the core of the feasibility study, have been usually analyzed with macroscopic and aggregated methods and data for simplicity due to the relatively big network size. However, transportation service attributes such as bus travel time have not been accurately observed and used in the feasibility study in South Korea. The bus travel time has been used as the same value of the auto travel time or multiplying the auto travel time by a unique factor overall a selected region. Therefore, in this study, we use the observed data such as navigation and smartcard data to apply realistic bus travel time in calculating the travel time-saving benefit. In order to reflect the difference in bus travel time by transportation environments, the study also suggests a method to use an adjustment factor for each OD pair differently rather than using a unique factor. To determine the required minimum number of samples of the navigation and smartcard data, the coefficient of variation (CV) and the variation ratio (VR) were analyzed before calculating a representative adjustment factor for each OD pair. The study concluded that the true value of the adjustment factors in the population data could be estimated within the statistical error range when they were calculated with 7 or more day’s data. This study performed a case study to see differences between the existing method and the proposed method in calculating travel time benefits. The case study showed that the difference in the amount of the benefit between the two methods could influence the decision making in the feasibility study. This means that the reliability of the analysis result can be improved if the data-based estimating bus travel time is realistically used.
#adjustment factor #benefit of travel time saving #bus travel time #feasibility study #observed data #보정계수 #통행시간 절감편익 #버스 통행시간 #타당성 분석 #관측자료

Contents

Abstract
초록
서론
기존문헌고찰
버스 통행시간 추정을 위한 보정계수 산정
버스 통행시간 보정계수 산정 결과
기종점 기반의 통행시간 절감편익 산출
결론 및 향후연구
References

References (28)

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Bar-Gera H., Boyce D. (2003), Origin-based Algorithms for Combined Travel Forecasting Models, Transportation Research Part B: Methodological, 37(5), 405-422. google schola Chang S. E., Kang J. H. (2008), Values of Travel Time Reliability, J. Korean Soc. Transp., 26(6), Korean Society of Transportation, 133-142. google schola Chang S. E., Kang J. H., Lee S. J. (2008), A Measure for Travel Time Reliability, J. Korean Soc. Transp., 26(5), Korean Society of Transportation, 217-226. google schola Cheon S. H., Kim H. M. (2013), Application Method of Car Navigation data in Transportation (카 네비게이션 자료의 교통분야 활용방안), Monthly KOTI Magazine on Transport, 54-59. google schola Dial R. B. (2006), A Path-based User-equilibrium Traffic Assignment Algorithm that Obviates Path storage and Enumeration, Transportation Research Part B: Methodological, 40(10), 917-936. google schola

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