The paper deals with the problem of elas1ic stability of antenna-column ofneglec/able own weight subjected to the actionof effective load on its lop. The determination of critical bucklingforce is based upon the derived exact solution to !he equilibriumequation of the column of continuously variable crosssection loaded with conswnl compressive force.

Overtaking is presemed as one of the indicators of roadtraffic flow. The possibility of overtaking depends on the existenceof an intetval in the opposing traffic flow sufficient to performovertaking. It also analyses the probability of overtakingby applying adequate equations and graphical presentations

In this paper the application of the queuing the01y in optimalcapacity planning for general cargo seaport is presented.The seaport as a queuing syslem is defined and tlws, on the basisof the arrival and serviced number of ships in an obsen•edtime unit, the appropriate operating indicators of a port systemare calculated. Using the model of total port costs, the munberof berths and cranes on the berth can be determined wherebythe optimal port system functioning is achieved.

It is difficult to find the right tool for making traffic regimemodels because so many different situations are involved.SIMULINK has proved to be one of the best. The paper showsthe design and the use of components and models in the programMarlab!SIMULINK. It presems the simulation results forthe model of a traffic light controlled crossroadand indicatesthe possibilities for the study of traffic optimisation in junctions.

Joining the European Union is the strategic priority for theRepublic of Croatia. Croatia has always been part of the Europeaneconomic region. The success of adaptability of the Croatianindust1y, particularly of Croatian traffic, to the EuropeanUnion, will greatly depend on the possibility of establishing contractualrelations of the economic and traffic branches with theEU. Therefore, this paper considers in more detail the traffic aspectsof integration.It is a fact that the EU traffic policy is contained in the RomanAgreement (1957) whose aim was elimination of the barriersfor the flows of goods, se1vices and capital, and the integrationof the European region. Thus, it requires equal treatmentof all the traffic branches and all the carriers, freedom forthe activities of transport companies, as welT as freedom for these1vice users to choose the transport means and carriers. Thisnaturally requires maximum rationality in fi·eight flows reflectedon the financial and commercial business activities of acompany.To converge maximally with the European Union is thestrategic priority of the Republic of Croatia, and within the Croatianindus fly this will especially require the adaptation of theCroatian traffic. The basic precondition for the functioning ofthe traffic ~ystem on the European transport market is the compliancewith the rules and standards determined by the internationalconventions.

Various rheoretical models for determining !he durability ofuniversal join Is are proposed in literature, so !hal their evalualionand comparison with test resul/s helps to acquire knowledgeof !he universal joint opera/ion principles.The paper considers, !here fore, the connection between thedynamic behaviour of universal joint and the damage that occurs.Since the proper performance of universal joinls is directlyrelated to the pelformance of universal joint journal bearings,monitoring and analysing the damage initiation and developmentare necessary for !he evalua/ion of safety and durability.

The study of the organisation and technology of work intraffic in general as well as in road craffic is conducted from differentstandpoints. Relevant scientific and expert literaturedeals with different approaches to the above study, which generatesconfusion among the experts who want the organisationand 1echnology of work in road lraffic to be based on thegrounds of scientific organisation of work. The paper deals withthe aspeCl of study which is based on the theory of scientific organisationand technology of work as well as its implementationin road traffic. The paper analysis especially the methodsby which human work and influences upon it in road traffic arestudied. The results of the said aspect of study show that it ispossible 10 rationalise work, improve the exploitation indexesand, in general, improve the efficiency of existing organisationand technology of road traffic as a whole. Using the same aspectof study a new organisation and technology of road trafficcan also be established and optimised.

Communications have become irreplaceable part of eveJydayaccivities. Mobile communication is gaining in importancedue to the mobility of terminals and persons. Telecommunications,computer and media indus fly are getting connected andthe chain of values shifts from components to overall solutions.Possibilities offered by information technology are limitless,and its application enables better working conditions since theykeep humans away from dangerous working places and facilitateheavy tasks. The applications in the field of informationand communication technology make it possible to drive fromone end of the continent to another without needing any maps.The computer onboard a vehicle can choose the best directionand adapt to the travelling conditions.

The quality of information about road conditions in theRepublic of Croatia do nor meet the needs of their users- roadvehicle mororists, regarding their content, updating criteria andtimely announcement and warning of potential risks for thedrivers. Neither do they meet the criteria of monitoring and supportduring poor traffic and weather conditions. The paper considerscritically the cwTent situation in the information systemabout the road conditions in the Republic of Croatia, and studiesthe reasons for such a condition. It also gives guidelines forimproving the level of quality of this service and the plans for itsdevelopment. It mentions the activities that should be carriedout in order to improve the whole information system regardingupgrading oft he current system in the segments of receiving anddistributing information, application of new technical andtechnological solutions (CPS, RDS, TMC), development andimprovement of the information and communication infrastructure,data exchange network, introduction of navigationsystems, etc.

Animal welfare is becoming an evermore-important factorfor air carriers from the economical viewpoint, due to its importantimpact on the carrier public image. High standard care hasto be taken of animals during transport in order to satisfy an importantsegment of airline customers, either the Business/Firstclass passengers travelling with pets, or influential shippers ofracing horses, dogs, Zoo species etc.Air transp011 of animals, disregarding other advantages,may pose a threat to their health and welfare being a significantmultifactorial stressor. Along with cardiovascular, endocrineand metabolic abe1mtions, it affects the immune response ofan animal and increases susceptibility to infection. Therefore,strict conditions for air transport of eve1y animal species havebeen imposed. Transport of only healthy animals is approved,as it is necessG/y to prevent the spread of disease during transportand to provide satisfactOJy environment for animals to betransported.

The overall traffic connections within Europe are particularlyimportant from the economic point of view of eve1y Europeancountry. Therefore, the development of traffic and trafficinfrastructure in the European Union are considered with specialattention. The main aim of traffic development in the EuropeanUnion is full possible freedom of movement both fromthe technical and organisational aspect, with continuous improvementin traffic safety and environmental protection.Traffic development and connections are one of the essentieddevelopment factors of eve1y modem counlly. Every COU/1-try tends to organise traffic system in the way that suits her best.The same holds for the European Union as well. The leadingbodies in the European Union agree that the EU traffic systemneeds to be set upon such fundamentals that it can follow furtherdevelopment of the community. EU connects 15 membercountries into a single community, and it also plans soon to expandonto new members.The aims set by the Maastricht Agreement have been realisedby announcing the traffic guidelines on infrastructure projectsthat should be realised. In the Commission's proposal tothe Council and the Parliament in 1994, on the development ofTrans-European traffic networks, a ve1y efficient plan was presentedof connecting national traffic networks into a singleTrans-European network, to be realised until 2010.Overall economic and political connections of the EuropeanUnion and the countries in transition are becoming strongereve1y day. Several countries in transition are already preparingfor joining the European Union. This brings to the fore theneed for better traffic connections of EU and the countries intransition.In some sections the adopted Crete corridors pass alsothrough Croatia. Moreover, Croatia is located on the main Europeantraffic routes from the North to the South, and from theEast to the West.

The introduction of information technology into the Croatianair traffic control system at the TMA Split and the applicationof computer programs have significantly improved airtraffic safety. In other words, a reliable and fast analysis is providedas well as remote control of technical systems, reductionof possible human errors in pre-flight and in-flight activities.Also the preconditions are created for its integration into thecomputer sysrems of other air traffic participants.

The ever-increasing use of private cars is a consequence ofthe improving standards of town-residents, availability of passengervehicles and their needs and experiences of the freedomof movement. Traffic planners today are faced with the need tomeet the numerous needs for mobility by town-residents andthe available traffic infrastructure, with the aim of sustainableliving in urban agglomerations. Since one of the basic aims ofthe overall traffic policy is the downsizing of the volume of passengervehicle travelling to an acceptable and tolerable measure,the parking measures and strategies are used more andmore frequently as a means of achieving this goal.This is proved by the applied experiences of the cities in thedeveloped countries, and by the growing number of researchand analyses of the parking policy influence on the traffic regulationin town agglomerations. The first results provide encouragementfor planners and strategists to continue designingstrategies and parking policy measures dependent on the transportdemand management in big cities.

The use of road vehicles is increasing, the benefits they affordhave been progressively diminished by external costs.Whereas traffic increases as we approach the centre, the roadand open space decreases. The greater specialisation allows thecity growth in size and in traffic attraction. In this way urbangrowth feeds itself !mer-urban transp011 facilities also becomemore extensive. Growth in size of the city generates greateramounts of traffic and can eventually give rise to agglomerationdiseconomies. Higher transport costs, offices and shops, attractedby the accessibility of central locations, gradually replaceresidential uses, people being forced to seek housing inthe suburbs. As the urban area expands and offices in the citycentre are built denser and highe1; traffic congestion increases.This may result in the fall in centra/land values, since accessibilitydiminishes with the saturation of transport network. Increasedpollution takes various forms as noise, smoke andovercrowded housing in the centre, urban decay in the transitionalzone as commercial development is anticipated.