Most of transportation systems behave as MIMI1 queuingtype which is widely explored throughout scientific literature.On the other hand, there are a few real life examples of transportationsystems with deterministic service time. In this paperwe explore one of such systems and propose solution finding fortactical port operational problem by queuing model and heuristicmethod. A heuristic approach is developed as an alternativeto mathematical model solution finding. Between these twomethods, good SQlutions of known quality are provided quickly.Through simple example of bulk loading terminal, defined asMIDI1 system, comparison of the heuristic solutions to themathematical model indicates that the corresponding resultsmatch closely. On the basis of the experiment, we assume thatthe same heuristic with a slight modification would give acceptablesolution for a real life MIDIS problem where search for feasiblesolution by mathematical model is a tough and unacceptabletask in practical use.

The paper demonstrates the influence of the multi-channelpedestrian flow on the actual capacity of a one-lane roundabout,using micro-simulation and discrete functions. The proposedmodel is based on the theory of the expected time gap betweenthe units of pedestrian traffic flow, which have the prioritywhen crossing the arm of the roundabout. The proposedmodel represents an upgrade of the previous research in thefield of modelling traffic flows in the one-lane roundabout.Apart from the multi-channel pedestrian flow the disturbancescaused by the circular traffic flow of motorised vehicles at theroundabout are also considered. In this way the model canbetter illustrate the real conditions in traffic. A simulation analysishas been performed on the roundabout arm at KoroskaStreet in Maribor. The results of the analysis have indicated arelatively high reserve of the actual throughput capacity for themain motorized traffic flow in the analysed roundabout arm.The presented model represents a practicable and adaptabletool for planning the roundabout capacity in practice and forthe sensitivity analysis of individual variables on the throughputcapacity of the roundabout.

The task of transport management is to organize the transportof goods from a number of sources to a number of destinationswith minimum total costs. The basic transportation modelassumes direct transport of goods from a source to a destinationwith constant unit transportation costs. In practice, however,goods are frequently transported through several transientpoints where they need to be transshipped. In such circumstancestransport planning and organization become increasinglycomplex. This is especially noticeable in water transport.Most of the issues are directly connected to port operations, asthey are the transshipment hubs. Since transportation is under anumber of influences, in today 's turbulent operating conditionsthe assumption on fixed unit transportation costs cannot betaken as realistic. In order to improve decision making in thetransportation domain, this paper will present a stochastictransshipment model in which cost estimate is based on MonteCarlo simulation. Simulated values of unit costs are used to devisean adequate linear programming model, the solving ofwhich determines the values of total minimum transportationcosts. After repeating the simulation for a sufficient number oftimes, the distribution of total minimum costs can be formed,which is the basis for the pertinent confidence interval estimation.It follows that the design, testing and application of thepresented model requires a combination of quantitative optimizationmethods, simulation and elements of inferential statistics,all with the support of computer and adequate software.

This paper deals with the take-off and landing procedure ofvarious aircraft types from the same nmway. There are four-type queues, three different holding positions and one approach.The simulation model for these conditions has been created.The simulation analysis of the use of manoeuvring areaby commercial and training aircraft indicates the necessity ofthe optimisation of the air traffic management and harmonisationof the participants' operational procedures.

The Container terminal of the Port of Rijeka is highlypromising due to the high rising trend of container traffic. Thecontainer terminal competitiveness of the Ports of Rijeka, Triesteand Koper shall be compared by competitiveness matrixdemonstrating the justifiability of investments in containerizationof the Port of Rijeka. The competitiveness also depends onthe traffic conne.ction between port and hinterland indicatingthe need to modernize traffic routes connecting the port to thetraffic network. Investments in port and traffic infrastructureprove their justification in upgrading a level of container terminalquality and capacity as well as in increasing incomes thatcan be generated by implementing the development plans formodernization of the port, railroad and road infrastructure.

We live in a time of continuous technical and technologicaldevelopment. It is the time of globalization which is the maindriver of the technological procedures in the process of executingtransport services. Railway transport in Europe requiresspecial attention, since it has a number of attributes which arenot being effectively used. Measures to reduce the use of roadnetwork have been prepared, which would consequently increaserailway transport. Individuals in personal vehicles couldreduce transport costs with the increasing use of railway transport.The introduction of car trains in Europe is also supportedby the European Union, but there has been very little done inthe European car train system. The first goal of the Europeanunion seems to be understandable : using piggyback transportto redirect as much road freight transport as possible to the Europeanrailway system. Car trains in the integrated Europeanrail system are one of numerous possibilities of how to offer auser of personal vehicle and his fellow passengers a safe, comfortable,economical and ecologically acceptable way of travelon a specific distance in the local or global sense of combinedtransport of vehicles and passengers.

This article describes orientations in optimization of operationson a maritime container terminal. With the application ofan adequate model for forecasting, planning and simulating itis possible to increase the productivity and optimize the capacityof the terminal. The emphasis is mainly on setting up the decisionmaking model, in order to raise productivity in all subsystemsof the maritime container terminal.Management of a maritime container terminal is a complexprocess, which includes a vast number of different decisions.The management must develop elements and strategiesfor checking the productivity and its rise, which can only beachieved through optimization of the entire system. Withknowledge about new technologies, operational processes,methods of forecast and simulation it is possible to achieve theeasiest usage of different strategies for improving productivity.This is particularly valid for terminals, where the physical extensionof the terminal is practically impossible and further developmentof the system is possible only by searching internalsources. Therefore, the management of a maritime containerterminal must develop an appropriate decision support mode~in order to make an adequate support to strategic decisions.These decisions relate basically to the assessment of the best developmentand optimization decisions and on application ofproposed solutions in the infrastructure and suprastructure ofthe terminal.

The complexity of researching traffic under extraordinaryconditions in order to implement a more efficient and functionaltraffic management strategy under both normal and irregularconditions- as well as the grey zone of when the changefrom normal into extraordinary traffic conditions actually occur-provides the researcher with numerous methodologicalproblems.Starting from the viewpoint that the field of traffic scienceneeds an increase into the capacity of research into traffic underextraordinary conditions we have chosen to define withinthis article a specific methodological approach that undertakesa study into the exposure, menace, threat and risk faced by trafficsystems under extraordinary conditions through utilisingmethods utilised by the military that allow for the possible resolutionof such problems through compatible testing of both simulatedand real life conditions that such systems may face.In searching for possible applicable solutions to such demandingparametres we believe that the use of concrete informationin real time and real space in order to bring about amore efficient functioning of traffic under extraordinary conditionscan be achieved through the use of the analytical capacityof traffic systems information gathering attained through theusage of Uninhabited Flying Vehicles (UFVs) in monitoringroad, rail and maritime traffic and transport.