Dynamic Ship Domain Models for Capacity Analysis of Restricted Water Channels

Liu, Jingxian; Zhou, Fengjiao; Li, Zongzhi; Wang, Maoqing; Liu, Ryan Wen

doi:10.1017/s0373463315000764

Cited by 96 publications

(39 citation statements)

References 25 publications

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“…To mention a few, on the one hand, Fujii and Tanaka, Goodwin, Coldwell, Hansen et al, and Wang and Chin studied empirical ship domain models [12][13][14][15][16]; on the other hand, Zhu et al, Pietrzykowski and Uriasz, and Dinh and Im researched knowledge-based ship domain models [17][18][19][20]. Other authors such as Montewka et al, Davis et al, Wang et al, Rawson et al, and Liu et al have studied analysis-based ship domain models [21][22][23][24][25][26][27]. The International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA) Waterway Risk Assessment Program (IWRAP), which is used as a maritime traffic evaluation tool, is a representative evaluation method that quantitatively calculates collision probability based on statistical data of vessels.…”

Section: Introductionmentioning

confidence: 99%

An Improved Ship Collision Risk Evaluation Method for Korea Maritime Safety Audit Considering Traffic Flow Characteristics

Yoo

Kim

2019

JMSE

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Ship collision accidents account for the majority of marine accidents. The collision risk can be even greater in ports where the traffic density is high and terrain conditions are difficult. The proximity assessment model of the Korea Maritime Safety Audit (KMSA), which is a tool for improving maritime traffic safety, employs a normal distribution of ship traffic to calculate the ship collision risk. However, ship traffic characteristics can differ according to the characteristics of the sea area and shipping route. Therefore, this study simulates collision probabilities by estimating the best-fit distribution function of ship traffic flow in Ulsan Port, which is the largest hazardous cargo vessel handling port in Korea. A comparison of collision probability simulation results using the best-fit function and the normal distribution function reveals a difference of approximately 1.5–2.4 times for each route. Moreover, the collision probability estimates are not accurate when the normal distribution function is uniformly applied without considering the characteristics of each route. These findings can be used to improve the KMSA evaluation method for ship collision risks, particularly in hazardous port areas.

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Section: Introductionmentioning

confidence: 99%

An Improved Ship Collision Risk Evaluation Method for Korea Maritime Safety Audit Considering Traffic Flow Characteristics

Yoo

Kim

2019

JMSE

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“…Moreover, ships are required to maintain safe distances between each other to avoid collisions in the waterway. Ship safety domain is a generalization of a safe distance [26] and is one of the criteria proposed for the safety of ships, particularly in restricted areas [27]. The widely adopted model is an ellipse with an offset center.…”

Section: Conflicts Between Ships In Opposite Directionsmentioning

confidence: 99%

A Hybrid Self-Organizing Scheduling Method for Ships in Restricted Two-Way Waterways

Wang¹,

Tian²,

Zhang³

et al. 2020

brod

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Traffic conflicts between ships are one of the most important reasons causing delays in restricted waterways. Aiming to improve the traffic efficiency, a hybrid self-organizing scheduling (HSOS) method for restricted two-way waterways is proposed. Ship transportation system is treated as a distributive and self-organized system under uncertainties. Each ship makes the decision on when to enter the waterway and how to keep the safe distance between them, while the VTS center could manage the direction of traffic flow according to the navigation situations. In order to reduce the traffic conflict between the opposite directions, small ships are given higher priority than the large ships in the same direction. When the large ships are accumulating, they are given higher priority than small ships in the same direction. The large ships are delayed while small ships decrease the waiting time. The trade-off between small and large ships can enhance efficiency by accumulating the large ships. Comparing the results from HSOS with First Come First Served (FCFS), it can effectively reduce the average delays brought by large ships, especially at high arrival rates.

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“…Another application of ship domain was done to analyse the free flow efficiency of vessel traffic between two pilons while including a Traffic Separation Scheme (TSS) . Liu et al (2016) developed a ship domain model, based on trigonometrical relations for capacity analysis of waterways. Their approach includes crossings in navigations, but the different turning directions within an intersection are not included.…”

Section: Introductionmentioning

confidence: 99%

A method to estimate the capacity of an intersection of waterways in ports

Olba

Daamen

Vellinga

et al. 2019

Transportmetrica A: Transport Science

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The maritime transportation growth leads to more intensively used waterways, especially in ports. Since the capacity of an intersection of waterways becomes more important, this research presents a new method to estimate this capacity. Based on an analogy between roads and waterways, the conflict technique is applied to an intersection of waterways. The vessel flows in each direction and their conflicting movements are input for the capacity calculation. The generic method can be applied to any intersection, considering the conflicts between the different streams in the intersection and the flows inferred from empirical data or from predictions. The applicability of the method is shown with two case studies, based on data from the Port of Rotterdam. After using the proposed method, we compare the real flows with the estimated ones to assess the capacity estimates. This method can improve traffic management strategies, traffic rules in waterway intersections or port designs. ARTICLE HISTORY

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Dynamic Ship Domain Models for Capacity Analysis of Restricted Water Channels

Cited by 96 publications

References 25 publications

An Improved Ship Collision Risk Evaluation Method for Korea Maritime Safety Audit Considering Traffic Flow Characteristics

An Improved Ship Collision Risk Evaluation Method for Korea Maritime Safety Audit Considering Traffic Flow Characteristics

A Hybrid Self-Organizing Scheduling Method for Ships in Restricted Two-Way Waterways

A method to estimate the capacity of an intersection of waterways in ports

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