“…Physical barriers occur due to technical reasons such as varied railway systems (NIIAT, 2017), varied gauges (He, 2016), or scarce rolling stocks (Zhang & Schramm, 2018); inadequate or complete lack of infrastructure at a given link or node; and inability of handling a certain capacity or certain objects. Nonphysical obstacles negatively affect the quality of services, e.g., improper handling of cargo, transparency level of procedures, and policies (NIIAT, 2017); inefficient BCP Procedure (ESCAP, 2018) (CAREC, 2018); inconsistent custom regulations (Yan & Filimonov, 2018) (Jakóbowski,et al,218); border security (Haiquan, 2017) (Islam, et al, 2013); and shipment disparity (Leijen, 2019) (Feng et al, 2020). Apart from that, sustainability aspects, e.g., discussed in Sayyadi & Awasthi, 2018, Sayyadi & Awasthi, 2020, or Dubey et al, 2015 are not considered in this study, although they are relevant to the BRI discussion.…”