Design of multimodal hub-and-spoke transportation network for emergency relief under COVID-19 pandemic: A meta-heuristic approach

When COVID-19 suddenly broke out, the epidemic areas are short of basic emergency relief which need to be transported from surrounding areas. To make transportation both time-efficient and cost-effective, we consider a multimodal hub-and-spoke transportation network for emergency relief schedules. Firstly, we establish a mixed integer nonlinear programming (MINLP) model considering multi-type emergency relief and multimodal transportation. The model is a bi-objective one that aims at minimizing both transportation time consumption and transportation costs. Due to its NP-hardness, devising an efficient algorithm to cope with such a problem is challenging. This study thus employs and redesigns Grey Wolf Optimizer (GWO) to tackle it. To benchmark our algorithm, a real-world case is tested with three solution methods which include other two state-of-the-art meta-heuristics. Results indicate that the customized GWO can solve such a problem in a reasonable time with higher accuracy. The research could provide significant practical management insights for related government departments and transportation companies on designing an effective transportation network for emergency relief schedules when faced with the unexpected COVID-19 pandemic.(c) 2022 Elsevier B.V. All rights reserved.

Automated summary

When COVID-19 broke out suddenly, there was a shortage of basic emergency relief in the epidemic areas. To address this issue, a multimodal hub-and-spoke transportation network was proposed to efficiently transport relief supplies from surrounding areas. A mixed integer nonlinear programming (MINLP) model was established to minimize transportation time consumption and costs. The Grey Wolf Optimizer (GWO) was employed and redesigned to solve this NP-hard problem, and the results showed that the customized GWO outperformed other state-of-the-art meta-heuristics in terms of time and accuracy. This research provides practical insights for government departments and transportation companies in designing effective emergency relief transportation networks during unexpected pandemics like COVID-19.