Transactions on Transport Sciences, 2008 (vol. 1), issue 4

Short - term Fiscal Needs vs. Long - term Sustainable Development

Emanuel Šíp

Transactions on Transport Sciences 2008, 1(4):145-156 | DOI: 10.5507/tots.2008.020

The following keynote text is to respond to the following fundamental questions: a. What are the existing activities to facilitate an open freight market free of distorted competitive conditions? b. What provisions are governments making for investment in rail infrastructure? c. How do transportation policy makers need to revise their strategies to satisfy EC goals? At the moment, a majority of goods are carried on Europe's roads, even if it brings about grave global problems. This is the main reason for the constant drive to internalize the external costs of road transport pursuing the 'user pays' and 'polluter pays' principles. The recently published...

Behavior of Particulate Matter Produced by Cars in a Regional Model of Urban Canopy Layer

J. Pospisil, M. Jicha

Transactions on Transport Sciences 2008, 1(4):157-164 | DOI: 10.5507/tots.2008.021

This paper introduces the utilization of the CFD technique for the modeling of PM10 (particulate matter 10 μm) behavior in urban areas, focusing on a description of the processes in the ground surface boundary layer. A description of the deposition and resuspension processes is introduced and applied to the regional numerical model of the city of Brno. The threshold velocity of re-suspension was obtained from the small scale modeling of PM10 dispersion in a street gully located inside the regional model. The predicted concentration fields were compared with theoretical studies and an in-situ measurement.

Hybrid Solution of Interoperable European Toll Service

V. Jirovský, M. Svítek, P. Přibyl, P. Moos, Z. Votruba

Transactions on Transport Sciences 2008, 1(4):165-174 | DOI: 10.5507/tots.2008.022

The paper summarizes the interoperability bottlenecks of EFC (Electronic Fee Collection) on the level of European electronic toll services and provides proposals for a new hybrid architecture that fulfils all European requirements, is compatible with current standards and enables the use of all admissible technologies for toll data collection (GNSS, GSM/GPRS, DSRC) specified in EC Directives. The hybrid solution is discussed with respect to the future development of Czech electronic toll system and also with respect to the interoperability of our neighboring countries.

The Modeling Processes Exploitation by Pavement Management System in Slovakia

M. Decký, M. Kováč, J. Čelko

Transactions on Transport Sciences 2008, 1(4):175-184 | DOI: 10.5507/tots.2008.023

Road evenness is one of the basic factors of pavement quality. It represents not only the characteristic of the road serviceability, but also road safety and comfort. Longitudinal unevenness causes traffic discomfort and a danger of wheel-pavement interaction decreasing.
Listed aspects were taken into account for an analysis of classification levels in the frame of the Slovak Pavement Management System. The simulations of different boundary conditions during pavement surface diagnostics were oriented above all to the response of unevenness to the vehicle and to the ride comfort consequently. On the other hand, an effect of unevenness to interaction...

Assessment of Morphology of Wear Particles in Oils for Vehicles

J. Machalíková, M. Sejkorová, M. Livorová, F. Krtička

Transactions on Transport Sciences 2008, 1(4):185-192 | DOI: 10.5507/tots.2008.024

This paper presents the results of a complex analysis of particles isolated from various kinds of oils (automobile engine and transmission oils, hydraulic and compressor oils) and oil filters. Morphological analysis was performed using analytical ferrography in combination with scanning electron microscopy, local electron microanalysis and image analysis. The results are a contribution to the quantitative assessment of processes connected with the wear of parts of vehicles and industrial machinery.

Information Power in Intelligent Transport Systems

P. Moos, M. Svítek, Z. Votruba

Transactions on Transport Sciences 2008, 1(4):193-202 | DOI: 10.5507/tots.2008.025

The decision making process in the environment of an Intelligent transport system (ITS) with a high level of uncertainty is strongly dependent on the level of conceptual and contextual knowledge. The effectiveness of the decision making process of ITS relates to the available information power (P) which is considered as a vector in the plane given by the orthogonal system of information flow ( Φ ) and information content (I). The paper introduces the information power as data, information and knowledge alliance. This approach enables us to measure the ITS effectiveness through information power and yields directly to optimal prognoses given by...

NDT of Reinforcement Corrosion Using Ultrasonic Spectroscopy

M. Kořenská, M. Matysík, K. Pospíšil

Transactions on Transport Sciences 2008, 1(4):203-210 | DOI: 10.5507/tots.2008.026

Corrosion of built-in steel reinforcement ranks among the most serious mechanisms of bridge structure degradation. There are many reasons for the corrosion to occur: failures occurring during the bridge construction, consequences of traffic load, or, simple, ageing of the structures. Visual inspection of a bridge provides general information on the bridge condition. However, it cannot provide any information on the internal structure and integrity of the reinforced concrete or pre-loaded elements of the bridge in question. This is why non-destructive diagnostic methods are acquiring growing importance, helping researchers to properly evaluate the condition...

Architecturing Future-proof Distribution of Traffic and Travel Information Using TPEG

J. Vlčinský

Transactions on Transport Sciences 2008, 1(4):211-218 | DOI: 10.5507/tots.2008.027

The article summarizes key recommendations for creating a traffic and travel information distribution architecture, which will function properly and without changes for longer time. Recommendations are based on a work proposing an architecture over a distributing traffic and travel information over digital radio broadcasting and Internet using TPEG formats and protocols. The whole process of architecturing is briefly described starting with the planning scope, expected results and steps to achieve them; and the process of requirement engineering. For the requirements a list of user needs, created for intelligent transportation systems (ITS) by project...