Kim, Chansoo Goh, Segun Choi, Myeong Seon Lee, Keumsook Choi, M. Y. 2024-01-19T16:34:29Z 2024-01-19T16:34:29Z 2021-09-02 2020-09 2071-1050 https://pubs.kist.re.kr/handle/201004/118179 Bus transportation networks are characteristically different from other mass transportation systems such as airline or subway networks, and thus the usual approach may not work properly. In this paper, to analyze the bus transportation network, we employ the Gini coefficient, which measures the disparity of weights of bus stops. Applied to the Seoul bus system specifically, the Gini coefficient allows us to classify nodes in the bus network into two distinct types: hub and peripheral nodes. We elucidate the structural properties of the two types in the years 2011 and 2013, and probe the evolution of each type over the two years. It is revealed that the hub type evolves according to the controlled growth process while the peripheral one, displaying a number of new constructions as well as sudden closings of bus stops, is not described by growth dynamics. The Gini coefficient thus provides a key mathematical criterion of decomposing the transportation network into a growing one and the other. It would also help policymakers to deal with the complexity of urban mobility and make more sustainable city planning. English MDPI ORTHOGONAL REGRESSION Hub-Periphery Hierarchy in Bus Transportation Networks: Gini Coefficients and the Seoul Bus System Article 10.3390/su12187297 1 SUSTAINABILITY, v.12, no.18 SUSTAINABILITY 12 18 scie ssci scopus 000584282800001 Green & Sustainable Science & Technology Environmental Sciences Environmental Studies Science & Technology - Other Topics Environmental Sciences & Ecology Article ORTHOGONAL REGRESSION bus transportation system urban infrastructure network growth Gini coefficient complex systems