Optimization of Regional Hub-and-spoke Integrated Transportation Network: Empirical Analysis of Sichuan-Tibet Railway in China

2020 ◽  
Author(s):  
Xu Junxiang ◽  
Zhang Jin ◽  
Guo Jingni
Keyword(s):  
Empirical Analysis ◽  
Transportation Network ◽  
Hub And Spoke

Network Design for Shipping Service of Large-Scale Intermodal Liners

2012 ◽  
Vol 2269 (1) ◽  
pp. 42-50 ◽  
Author(s):  
Qiang Meng ◽  
Shuaian Wang ◽  
Zhiyuan Liu
Keyword(s):  
Network Design ◽  
Large Scale ◽  
Programming Model ◽  
Transportation Network ◽  
Liner Shipping ◽  
Maritime Transportation ◽  
Mixed Integer ◽  
Hub And Spoke ◽  
Shipping Company ◽  
Proposed Model

A model was developed for network design of a shipping service for large-scale intermodal liners that captured essential practical issues, including consistency with current services, slot purchasing, inland and maritime transportation, multiple-type containers, and origin-to-destination transit time. The model used a liner shipping hub-and-spoke network to facilitate laden container routing from one port to another. Laden container routing in the inland transportation network was combined with the maritime network by defining a set of candidate export and import ports. Empty container flow is described on the basis of path flow and leg flow in the inland and maritime networks, respectively. The problem of network design for shipping service of an intermodal liner was formulated as a mixed-integer linear programming model. The proposed model was used to design the shipping services for a global liner shipping company.

Topology Characteristic of Hub-and-Spoke Transportation Network

2013 ◽  
Vol 361-363 ◽  
pp. 2030-2035
Author(s):  
Ya Juan Deng ◽  
Shao Rong Hu
Keyword(s):  
Shortest Path ◽  
Evaluation Method ◽  
Transportation Network ◽  
Higher Order ◽  
Node Degree ◽  
Hub And Spoke ◽  
Node Importance ◽  
Structure Reliability ◽  
Reliability Indicator ◽  
Improve Planning

As the hub-and-spoke network can achieve the balance of efficiency and cost, currently it is widely used in aviation, public and logistics transportation. The article chooses connectivity, node degree, entropy, and concentration indicator to analyze topology characteristic of hub-and-spoke transportation network; as well as structure reliability indicator considering sub-network numbers, shortest path and network dimension to research the reliability of hub-and-spoke network. The conclusion includes: hub-and-spoke network has higher connectivity, larger difference of node importance, higher order and less convenient; the ability to deal with random attacks is strong while the capability to resist deliberate attack is poor. The conclusion can improve planning and evaluation method of hub-and-spoke transportation network.

scholarly journals Design Optimization of a HAZMAT Multimodal Hub-and-Spoke Network with Detour

2021 ◽  
Vol 18 (23) ◽  
pp. 12470
Author(s):  
Shuxia Li ◽  
Yuedan Zu ◽  
Huimin Fang ◽  
Liping Liu ◽  
Tijun Fan
Keyword(s):  
Economies Of Scale ◽  
Numerical Study ◽  
Transportation Network ◽  
Supply And Demand ◽  
Optimal Path ◽  
Hub Location ◽  
Hub And Spoke ◽  
Transportation Risk ◽  
Hazmat Transportation ◽  
The Cost

The growing transportation risk of hazardous materials (hazmat) is an important threat to public safety. As an efficient and reliable mode of transportation, the multimodal hub-and-spoke transport network helps to achieve economies of scale and reduce costs. Considering the dual goals of risk and cost management of hazmat transportation, a novel optimization model of a multimodal hub-and-spoke network with detour (MHSNWD) for hazmat on the strategic level is designed. It integrates the planning of hub location and route selection based on the risk quantification for different transportation modes. Additionally, a detour strategy is applied, which allows for more than two hub nodes to be selected to form an optimal path between any supply and demand nodes in a hub-and-spoke network. Then, the risk is taken as the main objective and the cost is converted into a budget constraint to solve the model by using CPLEX. Additionally, a numerical study is conducted based on a CAB dataset to find the influence of the number of hubs and budget constraints on the optimization results. In addition, a counterpart model of the multimodal hub-and-spoke network without detour (MHSNOD) is tested to validate the advantages of the proposed model of MHSNWD. The numerical experiment shows that an appropriate increase in the number of hubs and the cost budget can remarkably reduce network risk. Compared with MHSNOD, the optimal result of MHSNWD can achieve a marginal improvement in risk reduction. This work may provide an informative decision-making reference for planning a hazmat transportation network.

scholarly journals Designing Hub-and-Spoke School Bus Transportation Network: A Case Study of Wonkwang University

1970 ◽  
Vol 24 (5) ◽  
pp. 389-394 ◽  
Author(s):  
Jun-Hyuk Kim ◽  
Soonhu Soh
Keyword(s):  
Optimization Problem ◽  
Transportation Network ◽  
Combinatorial Optimization Problem ◽  
School Bus ◽  
Median Problem ◽  
Hub And Spoke ◽  
Total Travel Time ◽  
Operational Constraints ◽  
Bus Transportation

This paper provides a case study of hub-and-spoke school bus transportation network design. The case study here utilizes a mathematical model that is the P-median optimization model to determine optimal hub locations. The P-median problem is a combinatorial optimization problem that includes many binary variables and constraints. The selected objective of the model is to minimize the total travel time satisfying other operational constraints. To elevate usability of decision making in the future, we implement the simulation model through the template model in spreadsheet platform. The developed model is used as a future reference to find operational directions of school bus managing policy and also tested on the case of Wonkwang University.

scholarly journals Design of An Integration Model for Air Cargo Transportation Network Design and Flight Route Selection

2019 ◽  
Vol 11 (19) ◽  
pp. 5197 ◽  
Author(s):  
Carman K.M. Lee ◽  
Shuzhu Zhang ◽  
Kam K.H. Ng
Keyword(s):  
Network Design ◽  
Transportation Network ◽  
Transportation Cost ◽  
Route Selection ◽  
Air Cargo ◽  
Transportation Industry ◽  
Integration Model ◽  
Hub And Spoke ◽  
Cargo Transportation ◽  
Swarm Intelligence Based Algorithm

Air cargo transportation is an essential component in the freight transportation market, primarily due to the transportation requirements of time-sensitive products. Air cargo transportation plays an increasingly important role alongside economic development. Cargo flight network design and fleet routing selection significantly affect the performance of the air cargo transportation. In this research, we propose an integrated model simultaneously considering cargo flight network design and the fleet routing selection for the air cargo transportation. Two transportation modes, the direct transportation mode in point-to-point networks and the transshipment mode in hub-and-spoke networks, are compared. In order to solve the proposed optimization problem, a swarm-intelligence-based algorithm is adapted. Numerical experiments were conducted to examine and validate the effectiveness and efficiency of the proposed model and algorithm. The computational results suggest that the proper settings of hub and transshipment route selection in an air cargo transportation network can significantly reduce the transportation cost, which can provide practical managerial insights for the air cargo transportation industry.

Why China must build Sichuan-Tibet railway: From the perspective of regional comprehensive transportation network optimization

2021 ◽  
pp. 1-23
Author(s):  
Junxiang Xu ◽  
Jingni Guo ◽  
Yongdong Sun ◽  
Qiuyu Tang ◽  
Jin Zhang
Keyword(s):  
Simulated Annealing ◽  
Simulated Annealing Algorithm ◽  
Programming Model ◽  
Transportation Network ◽  
Policy Recommendations ◽  
Hub And Spoke ◽  
Passenger Transportation ◽  
The Future ◽  
Annealing Algorithm ◽  
Transportation Organization

We not only firstly applied the theory of hub-and-spoke network to the field of integrated transportation network planning, but also combined our proposed method with Sichuan-Tibet railway, one of super large projects in China, to discuss the optimization and the layout of hub-and-spoke integrated transportation network along the Sichuan-Tibet railway after it is put into operation in the future and put forward some directional policy recommendations. In our study, we have made clear the topological structure of the multi hub and single allocation hybrid hub-and-spoke integrated transportation network in the passenger transportation corridors, established the integer programming model aiming at the minimum generalized travel cost in the network, and we designed the simulated annealing algorithm to solve this problem. In the empirical study, we find that if 5 nodes are selected as hub nodes in hub-and-spoke integrated transportation network, the generalized cost of network travel will be minimized and these specific location of 5 hub nodes can be determined by the selecting principle of hub nodes location, which we proposed in our study. The simulated annealing algorithm can help us to find the connection relationship between nodes. Then we can achieve three types of hub-and-spoke integrated transportation network layout patterns with railway, highway and aviation as the hub nodes. Though further comparative analysis, we find that it is more feasible to choose the integrated transportation network with railway nodes as the hub in transportation organization. Based on this understanding, we put forward policy recommendations on transportation organization to support high-quality planning and operation of integrated transportation network to Sichuan Tibet region in China in the future.

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