Impact of traffic noise on railway traffic safety

Traffic noise is one of the dominant factors of ergo-assessment. The harmful impact of traffic noise on the engine driver as target group can be studied in isolation from other ergo-assessment factors only in the initial phase of research. The simultaneous action of several related factors in the system of ergo-assessment factors has cumulative effect on the perception and psychomotoric status of the railway traffic participants in the appropriate traffic situation. The initial partial research of traffic noise by a combination of several scientific methods needs to be eventually upgraded by studying the relations among several concurrent important or dominant ergo-assessment factors

Technical Documentation in Traffic Technology

The requirements for the prompt usage of traffic infrastructure capacities define the technological frames which ensure updated maintenance and development of new traffic infrastructure capacities by implementing graphical and computer systems. Technical documentation (TD) based on the technology of geographic information systems (GIS) allows fast analysis of graphical and alphanumerical data with the aim of identifying spatial relations among various cartographic elements. The paper analyses and presents the methodological bases of building GIS with the aim of designing the traffic network topology, as well as structural and functional analysis which uses the acquired knowledge to propose concrete solutions on connecting data about the position of infrastructure facilities with their properties in the railway traffic safety. KEY WORDS: technical documentation, geographic information system, structural and functional analysis, software for technical drawing, signalling devices, railwa

Managing Rail Traffic on Commuter Lines Based on Dynamic Timetable Application

The increase of demand for transport service in rail commuter traffic stipulates higher ratio of consumed infrastructure capacity. In this method of traffic flow even minor deviations from the planned timetable can have negative influence on its stability, and this can result in major reduction of the quality of transport service. This research has defined the commuter rail traffic management system model with the application of real-time timetable rescheduling. It understands the application of the decision support system during the procedure of adjusting the timetable to the real condition in traffic in the form of genetic algorithm defined on the basis of the valid rules for the train and traffic control. Besides, this model in all the commuter trains understands the existence of the driver advisory system which is based on the algorithm for determination of the most favourable running regime with the aim of saving in energy consumption. The paper proves that by applying the proposed model the commuter rail traffic can be improved regarding the increase of the timetable stability and energy-efficient train operation. KEY WORDS: rail traffic management, genetic algorithm, energy efficient timetabling and train operatio

Suvremeno rješenje povećanja pouzdanosti uređaja daljinskog upravljanja EVP-a

O pouzdanosti rada uređaja daljinskog upravljanja elektrovučnim postroje11jima ovisi ipouzdanost funkcioniranja cjelokupnoga v učnogsustava. Upravo stoga veoma je važno utvrditikoji kvarovi i smetnje najčešće uzrokuju ispadanjeiz rada pojedinih dijelova ili cjelokupnog elektrovučnog postrojenja.Za raspoloživost i pouzdanost radaelektrovučnog postrojenja posebno je odlučujućaduljina trajanja kvara ili smetnje, od njihovepojave do otklanjanja greške, odnosno ponovnogispravnog funkcioniranja.Ovaj rad se bavi upravo problematikom otkrivanja najčešćih kvarova ili smetnji, kao ionih čije je trajanje najdulje, a posebno načinimai metodama njihova smanjenja ili potpunog eliminiranja. Eliminacija kvarova ili smetnji 11a značinjihovo apsolutno sprečavanje, nego i preuzimanjenjihovih funkcija alternativnim elementima

Analiza sigurnosti delovanja žičniških naprav po metodi drevesa napak

This paper examines the reliability of the operation of cableway systems in Slovenia, which has major impact on the quality of service in the mountain tourism, mainly in wintertime. Different types of cableway installations in Slovenia were captured in a sample and fault tree analysis (FTA) was made on the basis of the obtained data. The paper presents the results of the analysis. With these results it is possible to determine the probability of faults of different types of cableways, which types of faults have the greatest impact on the termination of operation, which components of cableways fail most, what is the impact of age of cableways on the occurrence of the faults. Finally, an attempt was made to find if occurrence of faults on individual cableway installation has also impact on traffic on this cableway due to reduced quality of service.Članek proučuje sigurnost delovanja žičniških naprav v Sloveniji, katere imajo velik vpliv na kakovost storitev v gorskem turizmu, največ v zimskem času. V vzorec so bile zajete slovenske žičniške naprave različnih vrst in na osnovi pridobljenih podatkov o odpovedi njihovega delovanja je bila narejena analiza drevesa napak (FTA). V članku so predstavljeni rezultati analize s pomočjo katere se je dalo ugotoviti, kakšna je verjetnost odpovedi posameznih vrst žičniških naprav, katere vrste napak imajo največji vpliv na odpovedi, kateri sklopi žičniških naprav največkrat odpovedo, kakšen vpliv ima starost žičniških naprav na pojav napak. Na koncu se je poskušalo ugotoviti tudi, ali ima pojav napak na posamezni žičniški napravi tudi vpliv na promet zaradi zmanjšane kakovosti storitve

Methods For an Acceptable Traffic Noise Level Design

Road noise disturbance on rough roads by means of loudnesssensor caused by wideband signal components with a significantimpact of tonal effects on smooth roads and in specificactions in driving lead to the annoyance of drivers. A systemicapproach has been applied for the sound quality estimation ofphysical properties of various noise sources and structuralvibroacoustic car properties and its components as an integratedparameter in car design for the purpose of the developmentand vehicle noise reduction. Simulation of the most importantcharacteristics of listening impressions was performedby modem systems of signal analysis together with the presentationof loudness, sharpness, and roughness as essential quantities.Optimization of the noise control measuring regarding vehiclesound was obtained by means of a simulation system withthe capability of the real time original sound filtering. Structuralanalysis was performed as an acoustic modal analysis on therear part and the car interior with the quantitative analysis ofsport and luxury car sounds. The possibility of active noise controlwas studied and examples are given for an application ofpsychoacoustic tools for car sound quality design. Sound qualitywas obtained by an observation of certain aspects, which areempirically or theoretically connected with the design. An experimentalsound synthesis with psychometrical measuring wasapplied. The sound quality of car interior is presented takinginto consideration the criteria of objectivity, reliability and validity

Reliability Analysis of Operation for Cableways by FTA (Fault Tree Analysis) Method

This paper examines the reliability of the operation of cableway systems in Slovenia, which has major impact on the quality of service in the mountain tourism, mainly in wintertime. Different types of cableway installations in Slovenia were captured in a sample and fault tree analysis (FTA) was made on the basis of the obtained data. The paper presents the results of the analysis. With these results it is possible to determine the probability of faults of different types of cableways, which types of faults have the greatest impact on the termination of operation, which components of cableways fail most, what is the impact of age of cableways on the occurrence of the faults. Finally, an attempt was made to find if occurrence of faults on individual cableway installation has also impact on traffic on this cableway due to reduced quality of service. KEYWORDS: cableways, aerial ropeways, chairlifts, ski-tows, quality, faults, fault tree analysis, reliability, service quality, winter tourism, mountain tourist centre</span

Safety Elements at the Road and Railway Traffic Conflict Points

The work analyses the conflict points between road andrailway traffic as points of collision. The growing frequency ofboth transport modes meeting at the same level results in thegrowing danger at these points resulting in turn in traffic accidentsat collision points requiring therefore implementation ofprotection measures.Since misreading of traffic signs, unadjusted driving of roadvehicles, passage of road vehicles when the barrier is lowered,and inattention of motorists and pedestrians are the most frequentcauses of traffic accidents at railroad crossings, adequateand economically optimal solutions need to be found.By solving the above-mentioned problems, using the signaland safety as well as construction measures, the authors suggestsolutions which would increase traffic safety at railroad crossings

The Efficiency Links on a Graph in Transportation Network

The access to a single vertex of the non-directional transportationnetwork graph can be defined in various ways, but ifwe want to classifY the vertices and at the same time avoid ambiguity,then each of them has to be assigned a certain number.The paper uses the method for detemzining the access to a singlevertex based on the description of the transportation networkusing the symmetrical matrix of incidence. By knowingthe matrix of incidence it is possible to detemzine the eigenvaluesi.e. eigenvectors, and their comparison detemzines the valuesfor single vertices. Apart from describing the method, theconcrete example of the tram network of the city of Zagreb hasbeen analysed. Based on the obtained analysis results, it is possibleto detemzine the efficiency of connecting single vertices inthe considered transportation network, i.e. to propose its improvements