Academic Journal
Identifying Waterway Traffic Flow Patterns Using Modified Clustering
| العنوان: | Identifying Waterway Traffic Flow Patterns Using Modified Clustering |
|---|---|
| المؤلفون: | Pang, Shihao |
| المصدر: | Graduate Theses and Dissertations |
| بيانات النشر: | ScholarWorks@UARK |
| سنة النشر: | 2024 |
| المجموعة: | University of Arkansas: ScholarWorks@UARK |
| مصطلحات موضوعية: | Freight movement data, Machine learning, Marine Automatic Identification Systems (AIS), Marine transportation, Pattern recognition, Waterways data, Civil and Environmental Engineering, Civil Engineering, Engineering |
| الوصف: | Efficient management of inland waterways is essential for the economic and operational efficiency of transportation networks. Characterization and prediction of waterway vessel traffic flow patterns by time of day are critical for optimizing planned disruptive events like maintenance activities. This study identifies and predicts inland waterway traffic flow patterns along the Lower Mississippi River (LMR) using a modified clustering approach. A five-year period of Automatic Identification System (AIS) data, which tracks vessel movements in real-time, is used for model development and evaluation. The model first segments the river into approximately one-mile-long traffic message channels (TMCs) to estimate vessel counts and daily traffic patterns, represented as hourly volumes over a 24-hr period. Unique vessels in the TMC are counted towards the TMC volume. Then, daily traffic patterns of selected TMC are clustered using a modified clustering algorithm into groups to identify common patterns. Finally, using weighted averaging, common patterns are combined using weights based on the prediction month to estimate a time-of-day pattern and traffic volume for a future period. Data from 2018 to 2021 was used for model development and validation, and data from 2022 was used for model evaluation. The modified clustering approach enhances estimation accuracy, reducing the Mean Absolute Percentage Error (MAPE) from 34.6 (Mean) and 34.7% (Median) in baseline models to 30.6% and 29.8% with K-Means and DBSCAN, respectively. Moreover, the direction of vessel movements (upstream or downstream) had minimal impact on MAPE, suggesting that combined traffic data does not compromise prediction accuracy. Insights into time-of-day vessel traffic patterns aid in the optimization of maritime operations, enabling decision-makers to strategically plan waterway closures by determining the best timing and duration based on traffic patterns. |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| Relation: | https://scholarworks.uark.edu/etd/5505; https://scholarworks.uark.edu/context/etd/article/7058/viewcontent/1097709.pdf |
| الاتاحة: | https://scholarworks.uark.edu/etd/5505 https://scholarworks.uark.edu/context/etd/article/7058/viewcontent/1097709.pdf |
| رقم الانضمام: | edsbas.552618C |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |