Model of marine traffic flow organization in the approaching waterways

Osnovna svrha i cilj istraživanja u ovoj doktorskoj disertaciji s naslovom "Model maritimnog ustroja pomorsko-prometnog toka na prilaznim plovnim putovima" je opis i kvantificiranje sigurnosti plovidbe na prilaznim plovnim putovima te određivanje optimalnog maritimnog ustroja pomorsko-prometnog toka. Navedeni cilj je ostvaren izradom konceptualnog modela maritirmnog ustroja pomorskoprometnog toka. Modelom je sigurnost plovidbe prikazana funkcijom sigurnosti kao kombinacijom funkcije opće sigurnosti i funkcije povećane opasnosti. Prva funkcija opisuje opće prometno stanje na plovnom putu, a druga sigurnost plovidbe po povećanoj opasnosti. Funkcija sigurnosti je definirana elementima sigurnosti plovidbe te koeficijentima sigurnosti koji ovise o karakteristikama pomorskog prometa na plovnom području. Promjenom vrijednosti koeficijenata sigurnosti postiže se univerzalnost modela, odnosno mogućnost korištenja modela u različitim plovnim područjima. Pri istim vrijednostima koeficijenata, funkcija sigurnosti omogućuje usporedbu razine sigurnosti plovidbe različitog pomorskog prometa. Testiranje modela je napravljeno pomoću dinamičkog simulacijskog modela korištenjem stvarnih podataka pomorskog prometa. Rezultati simulacije dokazuju mogućnost korištenja modela za određivanje optimalnog maritimnog ustroja pomorskog prometa na prilaznim plovnim putovima i posljedično za povećanje sigurnosti plovidbe i djelotvornosti pomorsko-prometnog toka. Vrijednost predloženog modela ogleda se u mogućnosti njegove praktične primjene pri uspostavljanju odgovarajućih mjera i aktivnosti s ciljem poboljšanja sigurnosti plovidbe, prvenstveno kroz optimiziranje rada službi nadzora i upravljanja pomorskim prometom.The basic purpose and objective of the research in this doctoral thesis entitled "Model of marine traffic flow organization in the approaching waterways" is to describe and quantify the safety of navigation in the approaching waterways and to determine the optimal organization of marine traffic flow. The objective is achieved by creating a conceptual model of marine traffic flow organization. In this model, the safety of navigation is represented by the function of safety as the combination of general safety function and the function of increased risk. The first function describes the general state of marine traffic in the waterway, while the second one describes the safety of navigation in increased risk. Function of safety is defined by elements of the safety of navigation and safety coefficients that depend on the characteristics of the marine traffic in the navigable area. By changing the value of safety coefficients the universality of the model is achieved, resulting in the possibility of using the model in different navigable areas. While using the same values of the coefficients, the safety function allows comparison of various levels ofthe safety of navigation in different marine traffic situations. Testing of the model was performed by means of a dynamic simulation model using real data on marine traffic. Simulation results support the possibility of using the model for determining the optimal marine traffic flow organization in the approaching waterways and consequently for increasing safety of navigation and efficiency of marine traffic flow. The significance of the proposed model Lies in the possibility of its practical application for the establishment of appropriate measures and activities aimed at improving safety of navigation, primarily through optimization of the vessel traffic services. safety of navigation, marine traffic flow, model of marine traffic flow organization, approach ing waterways, function of safet