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Evaluation of Efficiency in the Seoul's Arterial Bus Routes Considering Undesirable Outputs  

Han, Jin-Seok (서울대학교 공학연구소)
Kim, Hye-Ran (국토연구원)
Go, Seung-Yeong (서울대학교 건설환경공학부)
Publication Information
Journal of Korean Society of Transportation / v.28, no.5, 2010 , pp. 43-54 More about this Journal
Abstract
In order to improve the existing evaluation system of bus services and gain more reasonable analysis outputs, the authors evaluate the efficiency of 113 arterial bus routes in Seoul in 2009 using a modified BCC model considering not only desirable outputs but also undesirable outputs. Each Decision Making Unit (DMU) is assumed to use inputs such as possession costs, operating costs, the ratios of median bus stops overlapped route lengths to produce estimates of desirable outputs (the number of passengers and service satisfaction score) and undesirable outputs (CO2 emissions). According to the analysis, the modified BCC model considering both desirable outputs and undesirable outputs shows more appropriate results. DMUs would be more efficient on average to reduce nearly 10% of the 3 inputs (possession costs, operating costs, and overlapped route lengths) and increase by about 160% the ratios of median bus stops. Also, a Tobit regression analysis is conducted to identify the most effective variables for maximum efficiency and discover that the variable of possession costs and the ratios of median bus stops are statistically significant.
Keywords
Efficiency; Translation Invariance; Reverse Two-Stage Method; Data Envelopment Analysis; Tobit Regression;
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Times Cited By KSCI : 3  (Citation Analysis)
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