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Related Experiment Video

Updated: Oct 22, 2025

Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street

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Published on: January 20, 2023

Vessel Scheduling Optimization Model Based on Variable Speed in a Seaport with One-Way Navigation Channel.

Dongdong Liu^1,2, Guoyou Shi^1,2, Katsutoshi Hirayama³

¹Department of Navigation College, Dalian Maritime University, Dalian 116026, China.

Sensors (Basel, Switzerland)

|August 28, 2021

Summary

This study introduces a novel vessel scheduling method to enhance seaport efficiency by optimizing vessel movements and minimizing waiting times. The approach improves traffic safety and operational performance in busy ports.

Keywords:

maritime shipping optimal scheduling time windows variable speed vessel scheduling problem

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Last Updated: Oct 22, 2025

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Area of Science:

Maritime Logistics
Operations Research
Port Management

Background:

Seaport efficiency is crucial for global trade, yet vessel scheduling faces challenges due to variable speeds and complex constraints.
Existing scheduling methods often lack adaptability to dynamic port conditions, leading to inefficiencies and delays.

Purpose of the Study:

To develop an optimized vessel scheduling method that improves in-wharf and out-wharf vessel efficiency in seaports.
To address the complexities of non-fixed vessel speeds and incorporate multi-time constraints for more accurate scheduling.

Main Methods:

A novel vessel scheduling method was proposed, defining a minimum safety time interval (MSTI) and calculating navigable time windows based on tidal height and vessel drafts.
The nonlinear scheduling problem was discretized into a linear problem, and a genetic algorithm (GA) was employed to optimize the vessel scheduling problem (VSP) with the objective of minimizing average waiting time.

Main Results:

The reformulated VSP model demonstrated a smaller relative error compared to general priority scheduling rules.
The proposed method effectively improved the efficiency of vessel optimization scheduling and enhanced traffic safety.

Conclusions:

The developed vessel scheduling method is versatile and significantly improves operational efficiency in seaports.
This approach offers a robust solution for optimizing vessel traffic and ensuring safety in dynamic maritime environments.