The Republic of Croatia is to a major degree interested in an accelerated modernization of the Adriatic-Danube Basin (Rijeka-Central European Countries) traffic corridor, to meet both its own requirements and the requirements o[ Central European countries which do not have a direct exit to the sea but have major volumes of transit freight transported by sea. The Rijeka-Zagreb railway line nowadays is not any limitation factor in either passenger or freight transport however the subject capacities should be maximum extended while taking account of all engineering and technological and management measures. The operation of the railway line should be made synchronous with the operation of the Rijeka railway junction, and port capacities (also calling for modernization) and finally with the facilities of the Zagreb Marshaling Yard. Geographic and traffic-aspersed advantages of Zagreb, in particular its significance in the corridor of Central Europe sets the requirement for the construction of a container terminal and goods collection and distribution center in Zagreb as major link on the Rijeka-Danube basin freight flows route.

This paper deals with the review of the existing conditions of platforms in the area of integration of the railways into the system of urban and suburban passenger transport in the City of Zagreb, and sets forth the recommendations of engineering (technical) resolutions for the construction of new platforms.

Strategic telecommunication development direction in Croatia has to be expected in three segments. The first relates to the achievement of the appropriate subscriber density of the basic telecommunication service – telephony (GTP), the second is in the modernization and application of new technologies of the telecommunication network (IDN, ISDN), and the third refers to the introduction of the wide range of new telecommunication services. Review and systematization of the telecommunication services is the main topics of the paper. A group of voice services and possibilities and non-voice services have been analyzed. In the paper there has also been discussed the problem of service integration from the exploitation viewpoint, technical and technological solutions as well as the commercial attractiveness. In it there has been given the review of the activities and the level of introduction of new services in HPT.

The authors set forth the criterion (i.e. the standard) which makes it possible to select one out of nine two-parameter models, i. e. empiric equations. This refers us to the very simple models which are rather frequently used in different applications including all aspects of traffic. Their utilization has been illustrated by examples.

This paper discusses the results of research in three different telecommunications system planning and management segments: link-up of the system control center and the outlying computer, estimate of the control center reliability and development of the algorhytm for optimization in the subscriber region. In addition the paper provides a parallel review and comparison of experiences related to the method of research in all three mentioned segments.

The concentration of carbon monoxide in motor vehicle engine exhaust emissions is rather important because it has the highest impact upon its toxic aspects. The emission of CO into the atmosphere from motor vehicle exhaust reaches the figure of 65%. The elements of exploitation on one side are the interchangeable systems of operation and on the other the change of the original drive features. The paper deals with the impacts of speed at different levels of transmission, richness of mixture, air temperature, height above sea level and road incline upon the concentration of CO.

Specific aspects of air transport as a unique engineering, technological, management and economic complex dynamic system in particular its specific engineering and technological features have conditioned a specific resolution of the requirements regarding the speed and efficiency of completion of the transport process and the requirements regarding the reduction of costs by introduction of all modern transport technologies characterized with inclusion of technical means and devices between the transportation means and freight for purposes of introduction of unit loads (freight) and concentration of freight (pallets and containers. Palletization and containerization of freight transported by aircraft have been accommodated lo technical and technological characteristics of transportation means in air transport so that consequently the circulation of pallets and containers used in air transport is mostly completed inside the system of air transport.

There exists no uniform definition of the terms of integrated, multi-modal and combined transport. The paper provides a review and a sort of delineation of the terms of integrated, multi-modal and combined transport.