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ISSN 2083-6473
ISSN 2083-6481 (electronic version)
 

 

 

Editor-in-Chief

Associate Editor
Tomasz Neumann
 

Published by
TransNav, Faculty of Navigation
Gdynia Maritime University
3, John Paul II Avenue
81-345 Gdynia, POLAND
www http://www.transnav.eu
e-mail transnav@am.gdynia.pl
Evaluation of Main Traffic Congestion Degree for Restricted Waters with AIS Reports
1 Shanghai Maritime University, Shanghai, China
2 Shanghai Maritime Safety Administration, Shanghai, China
ABSTRACT: Traditionally, marine traffic congestion degree in restricted waters is usually deduced from traffic volume or traffic density. Both of which, however, can not be easily and accurately determined and can not fully reflect the traffic congestion degree. This paper uses the concept of main traffic flow velocity, which varies with the main traffic congestion from a statistics view, to determine the main traffic congestion degree in restricted waters. Main traffic flow velocity can be calculated by averaging the speeds of all ships equipped with an AIS transponder if the percentage of these ships over all vessels in the main traffic is great enough and they are well-distributed, and a fuzzy relationship is established to determine the traffic congestion degree under varying main traffic flow velocity. The concept of main traffic flow velocity provides a more intuitive and accurate way to evaluate the main traffic congestion degree of restricted waters than traffic density and traffic volume in certain situations, and can be easily implement.
REFERENCES
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Khaled H. & Shinya K. 2002. Developing a Measure of Traffic Congestion: Fuzzy Inference Approach .Transportation Research Record (1802): 77-85.
Yan L. et al. 2007. Analysis and evaluation of navigation safe-ty influenced by navigation environment in port. Journal of Waterway and Harbor28 (5):342-347
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Zhaolin W. & Jun Z. 2004.Marine traffic engineering. Dalian: Dalian Marinetime University Press
Citation note:
Hu Q., Yong J., Shi C.J., Chen G.: Evaluation of Main Traffic Congestion Degree for Restricted Waters with AIS Reports. TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation, Vol. 4, No. 1, pp. 55-58, 2010

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