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http://dx.doi.org/10.12815/kits.2019.18.5.1

A Prioritization Method Considering Trip Patterns to Introduce Short-turn Buses  

Moon, Sedong (Dept. of Civil and Environmental Engineering, Seoul Nat'l Univ.)
Kim, Dong-Kyu (Dept. of Civil and Environmental Engineering, Seoul Nat'l Univ.)
Cho, Shin-Hyung (Institute of Engineering Research, Seoul Nat'l Univ.)
Publication Information
The Journal of The Korea Institute of Intelligent Transport Systems / v.18, no.5, 2019 , pp. 1-18 More about this Journal
Abstract
A short-turn bus is a bus that is operated within a subsection of an existing bus line. Previous studies regarding short-turn buses decided optimal turn-back points for a single bus line rather than a bus network. Also, in-vehicle crowding which has a significant impact on transit convenience was rarely considered. Therefore, this study aimed to develop a methodology to set priorities for the introduction of short-turn buses of bus lines and sections, considering crowding. To achieve this objective, we calculated occupancies and crowding alleviation benefits of existing bus lines overlapping a new short-turn route based on transit card data, before and after the introduction of short-turn strategy. Also, operator and social costs caused by the introduction of short-turn buses were calculated. Those procedures were iterated over bus lines and sections to operate a short-turn service, and a section whose benefit-to-cost ratio (B/C) is the largest in a line was selected to operate a short-turn service in the line. After, priorities of bus lines to introduce short-turn services could be determined based on B/C values, and the optimum total fleet size could be determined when a short-turn strategy is applied in multiple lines.
Keywords
Short-turn bus; Crowding cost; Travel pattern; Smartcard data;
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