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Promet - Traffic&Transportation journal

Accelerating Discoveries in Traffic Science

Accelerating Discoveries in Traffic Science

Articles

Vol. 18 No. 1 (2006)
Published on 25.01.2006

Ivan Bošnjak, Juraj Buzolić, Vjekoslav Čerkez
2006 (Vol 18), Issue 1
Fast development and implementation of new telecommunicationservices and Intelligent Transp01t Systems (ITS) havecreated new environment for the network telecom operatorsand service providers and logistic and transport enterprises. Thecmcial issue for successful business and other professional applicationsis the provision of the end-to-end quality of service inthe inter-network operation of mobile and fixed networks. Theproblem was less expressed in the traditional networks orientedto telephony, but the issue of different QoS algorithms growswith the spreading of data transmission services and multimediaapplications. The existence of different QoS algorithms andprocedures in the !?-based networks (JP- Internet Protocol)also makes difficult the finding of a single solution for the implementationofQoS in the !?-based networks. In the indicatedcontext this work systemically defines the problem of providinga single end-to-end QoS protocol in the connected UMTS/IPnetworks. The possibilities of its realization are presented on theexample of two protocols. The work gives the basic characteristicsof the two protocols that fulfil the criteria set in the realizationof the new generation of mobile networks.

Antun Stipetić, Miroslav Kreč
2006 (Vol 18), Issue 1
The tilting technology appeared as an idea more than 50years ago. The idea started to be applied in the design of transportmeans in a more significant manner during the 80s of thelast century, and has experienced major development duringthe last decade. The trains featuring tilting technology occupytheir place on the market segment as the possibility of improvingthe conditions (speeds commercially 10-20%) on windinglines with curve radii not less than 250 m. They do not representan alternative to the development of railway lines on trafficroutes, but rather a span between the present and the future.The work studies the basic technical elements of the tiltingtechnology with the emphasis on the area of infrastructure andwhat is recommended and should be done on the infrastructureso that the tilting technology could render the optimal results. Itis concluded that the use of tilting technology does not seek anyspecial technical solutions, but that certain elements of the raildesign require attention and should be designed in the appropriateway, at the same time not making any significant changesin the construction nor making it more expensive, but still improvingthe results of implementing the tilting technology intrains.The mentioned theoretical frames are implemented inpractice on the Zagreb - Split railway line where it has beenfound that along with the planned works on the modernizationof the rail, tilting trains result in additional improvement of theriding quality and render railway passenger transport competitiveto other transport modes.

Natalija Jolić, Nikolina Brnjac, Ivica Oreb
2006 (Vol 18), Issue 1
Concerning transport logistics as relation between transportand integrated approaches to logistics, some transport and logisticsspecialists consider the tenn tautological. However,transport is one of the components of logistics, along with inventories,resources, warehousing, infonnation and goods handling.Transport logistics considers wider commercial and operationalframeworks within which the flow of goods is plannedand managed. The demand for transport logistics services canbe valorised as highly qualitative, differentiated and derived.While researching transport phenomenon the implementationof models is inevitable and demand models highly desirable. Asa contribution to transport modelling this paper improves decisionmaking and planning in the transport logistics field.

Tone Magister, Milan Batista, Leon Bogdanović
2006 (Vol 18), Issue 1
Since the real reaction time of a driver involved in an accidentwill always be unknown to reconstruction experts, and becausethe driver's reaction time databases published in the respectiveliterature have become almost obscure and hard tocompare with the everyday practice of the accident reconstruction,expert decision was made at Transport Safety Laboratoryto engage in research of the driver's reaction time and in the reactiontime measurement techniques as well and to develop aPC-based simulator for measurements of the driver reactiontime. The structure of the Driver Reaction Timer simulator andits components are described as well as its measuring algorithm.The measurements of the driver's reaction time in thereal and simulated driving environment were performed, andthe results obtained are discussed. By comparing these results,the quality evaluation of the current stage of development of thesimulator is addressed and the necessary further developmentof the simulator defined.

Miroslav Borković, Petar Obradović, Igor Franolić
2006 (Vol 18), Issue 1
Today's dense air traffic and the worldwide move to FutureAir Navigation System (FANS) concepts demand a high levelof modem and reliable Air Traffic Control (ATC) equipmentto accommodate customer requirements now and in the future.The work tries to answer the questions that indicate the fact whya new VCS generation (Voice Communication System) basedon VoiP (Voice over Internet Protocol) has some essentialcomparative advantages related to the conventional VCS. Oneof the key arguments featuring the VoiP technology is its lowprice a~d wide application in modem communications. Becauseof the fact of the PC-based HMI (Human Machine Interface)application, IP-VCS could easily be implemented in thenew A TM data network infrastructure. In the future, the VoiPtechnology development and VoiP VCS will have to prove thatthey are ready to meet the requirements of more flexible, saferand cheaper way of air traffic management.

Gordana Štefančić, Zvonimir Pilih, Milan Stanković
2006 (Vol 18), Issue 1
The work will consider the significance of various publictransport modes, since different methods of travel that form thetransport system are interconnected. The application of thelevel of service in one mode influences other transport modesand changes depending on the type of travel and is divided inthree groups: urban, interurban and rural travel. In consideringthe significance of urban public transport there are three levelsof trip-end generation/attraction, with which six types of urbantravel can be identified. lnterurban travel is presented throughtwo main transport modes, rail and bus. Apart from businesstrips, air travel is relatively insignificant, primarily because ofthe prices and small distances. In rural areas, characterized bylow population density, there is the problem of travelling of theelderly people, as well as those without cars, as the difficulty ofproviding economic public transport services has increased becausethe number of carried passengers is small. This results inthe reduction in mobility and the quality of life. Attempts havebeen made to improve the standard of provision of public transportservices by introducing unconventional transport means.

Alžbeta Bielikova
2006 (Vol 18), Issue 1
The article deals with the corporate identity and its parts intransport organization. The corporate identity is a strategicallyarranged idea based on the firm's philosophy, firm's vision andlong-term business aim. It must be confirmed by the firm's behaviourand its internal and external communication.

Katalin Tanczos, Ferenc Meszaros
2006 (Vol 18), Issue 1
Question of transport infrastructure charges - among others- covers calculation and allocation of infrastructure costsreferring different users. Cost allocation forms the basis of settingthe user charges. The reason for the existence of applyingmileage-proportional pricing system is generally accepted, asthe European regulations also discuss this topic seriously. Thismileage-proportional pricing system demands an appropriatetoll collecting system, which meets the requirements of arrangedprinciples. Among these, the most important principlesare equity, effectiveness and efficiency. Electronic Toll Collecting(ETC) systems are an appropriate solution to solvingcharging problems in various ways according to the differentkind of systems. In Hungary the current motorway charging systemis not an adequate solution for success of these principlesin the long-term. A new, mileage-proportional pricing system isbeing initiated. This study presents the plans of HungarianETC system for motorway network, focusing on introductoryissues. Among several preparatory steps, examining acceptabilitybarriers of ETC system for the stakeholders of transport isneeded. Their problem perception is to satisfy their- often contrary-demands in equal, fair and effective ways. The policy implementationprocess also plays an important role to generatesufficient conditions to implement this solution. This contributionis to discuss these objectives in applying the ETC system inan acceptable way.


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