(1) the present traffic condition shows some difficulties in traffic lanes 2 & 8(to and from Japan), and 3 & 9(to and from South coast),
(2) the comparisons, generally, indicate lower ESA value in suggested roundabouts(TSS) than the present traffic measure, however,
(3) the roundabouts(TSS) make the traffic lane 1(from Pusan to East coast)and 9(form South coast to Pusan) longer naturally.
Eventually, this paper conclude that the ESA model is a useful technique to assess the traffic safety and the suggested roundabouts(TSS) could make the concerned area safer than present traffic situation
Marine traffic engineering is the technical field that observe flows of vessel traffic in accurate and describe the features of ships' movement statistically or analytically, then contribute to the improvement of the traffic flow and safety of traffic.
Recently, marine traffic engineering has been developed until that possible to estimate a changes in traffic flow caused from some transformations of the traffic condition, and to assess the feasibility and validity of the changes by computer simulation.
This paper aims to assess the present traffic safety at the sea area adjacent to Pusan harbour, and the validity of the suggested roundabouts TSS at the Pusan approaching water(by Park in 1998(1)) using ESA(Environmental Stress Aggregation) model
There are couple of steps to describe the marine traffic situation and to assess it's safety by computer simulation. The first step is observe the movement of vessel traffic concerned waters and to obtain the relevant data for computer simulation which is described in Chapter 3. A series of traffic surveys were conducted for 4 days and obtained valuable data including the tracks of the vessels, traffic volume, type and size of ships, and etc.
Second step is to carry out computer simulation to assess the simulated traffic flows by using suitable indexes of assessment model - ESA model.
Earlier studies and some theoretical backgrounds were examined in Chapter 2, the simulation process and valuable outputs from the simulation were described in Chapter 4.
The last step is to compare the results of assessment on the present traffic situation with the expected one by using suggested changes. The last part of Chapter 4 and Chapter 5 explains the results that