Delays belong to standard parameters used for the evaluation of any type of intersection and they are taken in the evaluation of the level of service of an intersection. Intersections with shorter delays bring about economical benefits both for the users and the community, and enable greater efficiency of a traffic system, which is becoming a significant criterion with the increasing motorization. The case studies carried out in Europe and worldwide reveal that roundabouts bring delay savings if compared with other intersections of the same operational level and nearly the same traffic volume. The paper shows the results of the comparison analysis of the roundabout and the signal-controlled intersection in the city of Osijek, Croatia. The statistical indicators have given the basis for the evaluation of delays at the observed intersections, offering at the same time the possibility to compare the analysis conclusions on the local level with the conclusions of the case studies carried out throughout Europe and worldwide. KEYWORDS: delays, roundabout, signal-controlled intersection

The authors of this paper have systematically studied the trends of increasing demand in nautical tourism. The increasing demand is followed by a significant increase of threats to the environment, but also to boaters and their vessels participating in nautical activities. The authors emphasise the obligation to observe safety requirements through defined and controlled procedures in marinas and at sea and implementation of international standards during the stages of organisation of nautical economy, i. e. nautical tourism with complementary activities. The authors explicate the implementation of international standards for selecting locations for marinas, construction and equipment of marinas and vessels, training of boaters – skippers, business operations of subjects and objects of nautical tourism and promotion of their services. Special attention is given to safety standards and procedures during emergencies at sea and in the ports. Each vessel is expected to have a GPS (Global Positioning System) device and a box similar to a black box in aeroplanes which could be used for reconstructing accidents. Radar systems, AIS system (Automatic Identification System) and alarm systems will minimise the time for interventions. The intervention procedures at sea are currently being determined aimed at minimising the time, but improvements are still needed. Special attention is also given to activities related to resolving crises, analysis of the existing and the potential causes and to defining of preventive actions. KEY WORDS: nautical tourism, international standards, crises

The traditional marine maintenance concept based on individual equipment manufacturer’s recommendations does not represent the most efficient maintenance strategy. Suggested manufacturer’s intervals can be modified due to a great number of factors that influence the condition and the component performance. In work [1] the model for defining and adjustment maintenance strategy onboard ships was developed, assuring the required level of safety and the lowest lifecycle cost. The present model for adjusting the maintenance interval of significant items is part of this model, which has been verified on real data from thirteen years of experience. The results obtained by the model are different from the data suggested by the manufacturer. KEYWORDS: maintenance, diesel-engine propulsion system, significant items, maintenance interval adjustment, failure rate, time between failures, maintenance interval adjustment of exhaust valve

Maritime passenger demand forecasting is a task that is almost always present in the development studies of passenger ports, both due to operational and investment requirements. If a port belongs to a tourist destination, then there is a reasonable intention to use the forecasting model in order to establish the dependence between the passenger and tourist demand. Since the reliability of forecasting depends to a great extent on the quality and availability of data, the forecasting model is often a compromise between the theoretical assumptions and practical possibilities. This paper presents the approach to maritime passenger demand forecasting using a case study of the tourist destination – Poreč, which has been the strongest destination in Croatia regarding tourist traffic for many years. The presented forecasting models can serve as one of the guidelines for further study of the relations between traffic and tourism. KEY WORDS: forecasting maritime passenger demand, forecasting tourist demand, traffic and tourism

The HRN EN ISO/IEC 17020:2005 requirements have been applied to the auditing of the operation of the stations for technical inspection of vehicles which, as part of the system of technical inspections and registration of vehicles in the Republic of Croatia is carried out by the Croatian Automobile Club, based on the public accreditation issued by the Ministry of the Interior of the Republic of Croatia. The direct consequence of the application of this standard, i. e. the implementation of the quality management system is the improvement of the quality and efficiency in performing the respective activity, thus raising the level of technical roadworthiness of vehicles, i. e. traffic safety on the roads in the Republic of Croatia. KEY WORDS: supervisory/inspection bodies, quality, quality management, technical inspection of vehicles, auditing

It may be well said that the most used indicator of the quality of any technical system is reliability. Basically, this indicator shows the probability of proper technical system functioning within certain time period and under given operating conditions. To ensure that a system under construction possesses adequate given pre-defined characteristics and reliability indicators, it is necessary to plan the reliability and apply suitable methods when new technical systems are developed. Road represents an elementary traffic subsystem, as well as a technical subsystem, constructed by the society in order to meet the communication needs. Its purpose is to enable traffic system functioning. If a road is seen as a system, one can observe the features determining the structure and the principal on which its function is based. The road functioning itself is characterized by a variety of features, the most important being the management characteristic and specific social interest, categorization structure, and roadway condition. To enable smooth and safe traffic, roads should be of prescribed technical and usage levels. Reference is made specifically to road maintenance in the Primorje-Gorski Kotar County. KEYWORDS: infrastructure, terotechnology, road network, maintenance, theory of benefit

Pan-European Corridor V that passes through the territory of the Republic of Croatia, i.e. Branches VB (Rijeka-Zagreb-Budapest) i VC (Budapest-Osijek-Sarajevo-Ploče) are of extreme importance for the traffic and economic system of the Republic of Croatia and the wider European area. Taking this into consideration, this study has analysed the relevant indicators of the traffic growth, structure and dynamics of the cargo flows on the Branches VB and VC of the Pan-European Corridor V. The cargo flows, as important elements of the traffic demand have been analysed regarding the presence of competition of alternative North-Adriatic and North-European traffic routes as important element of competitive environment in fighting to attract valuable transit market of Central Europe. Based on a detailed analysis of concrete statistical data, significant conclusions are derived about: quantity, dynamics and structure of the cargo flows, current traffic demand, competitiveness of corridors on Central European transit market, expected traffic demand, and conclusions about factors and circumstances that would positively, i.e. negatively affect the growth of cargo flows, and thus also the valorisation of the analysed Branches VB and VC of the Pan-European Corridor V within the European environment. KEY WORDS: Pan-European Corridor V, branches VB and VC, cargo flows, intensity, structure, dynamics, traffic demand

Transport companies are facing management problems of enhancing operation efficiency at limited resources. The decision-making procedures applicable to solve such problems can be made more reliable if relevant information on basic components of business or technology processes are available. This information base can be produced by using cost and performance management methods combining financial and technology system parameters. The paper aims at summarising the research results conducted in the field of developing cost and performance controlling tools using this approach for the case of different transport companies. After explaining the main modelling principles, the experiences of empirical pilot projects are discussed. The preliminary results of these projects have proved the significance of the elaborated methodology. At the same time, it can also be concluded that the modelling tool shall be adapted to the specific circumstances of the examined transport companies before practical implementations. KEY WORDS: cost calculation, performance management, controlling