Reliability analysis of operation for cableways by FTA (fault tree analysis) methodSergej Težak
, Zdravko Toš
, Ivo Jurić
, 2010, izvirni znanstveni članek
Opis: 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.
Ključne besede: service quality, reliability, fault tree analysis, faults, quality, ski-tows, chairlifts, aerial ropeways, cableways
Objavljeno: 05.06.2017; Ogledov: 171; Prenosov: 6
Celotno besedilo (653,93 KB)
Reduction of the roundabout capacity due to a strong stream of pedestrians and/or cyclistsTomaž Tollazzi
, 1999, izvirni znanstveni članek
Opis: Single-lane roundabouts may face the problems of getting crowded and empty in their circulatory roadway due to a strong stream of pedestrians and/or cyclists. Vehicles at the roundabout entries or exits have to provide the right of way over pedestrians and/or cyclists. Therefore, it comes to disturbances and traffic jams. If there are jams at the entry carriageway, vehicles are unable to get into roundabouts. If there are jams at the exit carriageway, vehicles are not able to leave the roundabout. When the length of vehicle platoon at the exits so long that it reaches the preceding entry, the roundabouts suffer from getting fully overcrowded. The paper presents the methodology of calculating the reduction of the roundabout capacity due to the pedestrian or cyclist stream. The method of calculating the reduction of the roundabout capacity with the disturbed streams may be used for roundabouts in urban environments, where the strength of the cyclist or pedestrian streams is not negligible.
Ključne besede: road traffic, roundabouts, roundabout capacity, traffic throughput, bicyclists, pedestrians
Objavljeno: 05.06.2017; Ogledov: 149; Prenosov: 7
Celotno besedilo (1,66 MB)
Real capacity of ropeway transportation subsystemDrago Sever
, 2000, kratki znanstveni prispevek
Opis: The ropeway transportation system plays a major role in mountain resorts. In order to provide a sustainable development of the entire mountain resort system, the real capacity of the ropeway transportation system was set. The real capacity of the ropeway transportation system is one of the indicators of the development harmonisation level of single system elements. The research into this field was carried out at the Road Traffic Centre of the Faculty of Civil Engineering, University of Maribor. The paper deals with the basic points of the topic and the methods used. The know-how transfer of experiences into the Slovenian environment is presented together with the obtained results.
Ključne besede: traffic management, traffic, transport, ropeway, capacity
Objavljeno: 05.06.2017; Ogledov: 124; Prenosov: 2
Celotno besedilo (2,01 MB)
Outsourcing logistics at petrol stations in SloveniaRatko Zelenika
, Darko Bečaj
, Helga Pavlić
, 2008, kratki znanstveni prispevek
Opis: The environmental disburdening by means of outsourcing logistics (sorting, bundling, transport) is today significantly more present, since this has been regulated by the law provisions on environmental protection and the economic reasons. Outsourcing logistics in this field with its activities such as: improvement in assembling separate fraction, introduction of new, i. e. additional boxes, usage of specific vehicles for collection and dispatch, reestablishment of information systems and organization of a centre for disburdening of the environment(sorting, bundling and waste disposal) is contributing largely to a better accomplishment of the mission of logistics rationalization and adaptation to new law claims on environmental protection.
Ključne besede: logistics, petrol stations, outsourcing logistics, environemntal protection, economics
Objavljeno: 05.06.2017; Ogledov: 102; Prenosov: 5
Celotno besedilo (2,45 MB)
Statični izračun poslovno skladiščnega objekta z žerjavno progoSimon Šilih
, 2017, drugo učno gradivo
Ključne besede: jeklene konstrukcije, statična analiza, dinamična analiza, dimenzioniranje, Evrokod, industrijska hala, žerjavna proga, utrujanje materiala
Objavljeno: 05.06.2017; Ogledov: 128; Prenosov: 39
Celotno besedilo (1,07 MB)
New type of roundabout: roundabout with “depressed” lanes for right turning - “flower roundabout”Tomaž Tollazzi
, Marko Renčelj
, Sašo Turnšek
, 2001, kratki znanstveni prispevek
Opis: Recently, many of the foreign traffic-safety analyses point out the low level of traffic safety in multi-lane roundabouts. This problem is resolved in several ways in different countries; however, the solution, whereby the number of conflict points is diminished (e.g. turbo roundabout) has proven to be the most successful. However, the turbo roundabout also has its deficiencies: it has conflict crossing points and larger reconstruction of the existing two-lane roundabout is needed when the turbo roundabout is to be implemented instead of the existing one. In the paper a new type of roundabout has been introduced; the roundabout with “depressed” lanes for right turning (“the flower-roundabout”). Financially speaking, the main advantage of the new type of roundabout is that it can be implemented within the dimensions of the already existing “normal” two-lane roundabout. From the traffic-safety point of view, the main advantage of the new type of roundabout is that it has no crossing conflict points.
Ključne besede: traffic safety, roundabouts, turbo roundabout, roundabout with "depressed" lanes for right turn
Objavljeno: 05.06.2017; Ogledov: 134; Prenosov: 6
Celotno besedilo (896,59 KB)
New type of roundabout: dual one-lane roundabouts on two levels with right-hand turning bypasses - "target roundabout"Tomaž Tollazzi
, Goran Jovanović
, Marko Renčelj
, 2013, kratki znanstveni prispevek
Opis: The problems of low level traffic safety on multi-lane roundabouts have been resolved in various ways in different countries, usually by using alternative types of roundabouts that reduce the number of conflict points. Alternative types of roundabouts typically differ from "normal" or "standard" roundabouts in one or more design elements, as their implementation purposes could also be specific. Today, several different types of roundabouts are already in use ("mini", "double mini", "dumb-bell", those "with joint splitter islands" ("dog-bone"), those "with a spiralling circular carriageway" ("turbo"), those "with depressed lanes for right-hand turners" ("flower") etc.). This paper introduces a new type of roundabout, dual one-lane roundabouts on two levels with right-hand turning bypasses, namely the "target roundabout". This paper describes and analyses their design, traffic safety, and capacity characteristics, compared with the standard two-lane roundabouts.
Ključne besede: roundabouts, alternative types of roundabouts, turbo roundabout, target roundabout
Objavljeno: 05.06.2017; Ogledov: 96; Prenosov: 6
Celotno besedilo (1,33 MB)
New feeder line rail freight paradigm for the European railwaysStanislav Božičnik
, 2006, kratki znanstveni prispevek
Opis: The article deals with the development of the new paradigm of the European rail freight system predominantly suitable for the feeder lines (market niches). Taking into consideration the so far adopted legal solutions of the EU Commission for internationalisation (liberalisation) of the European railway system, the concept of the new rail freight model was developed in order to contribute to the increase of the quality, as well as to the growth of the volume of the rail freight services in Europe. Based on the findings about the disadvantages of the existing rail freight paradigm, the new solution consisting of the three interrelated and interconnected subsystems: institutional, technical/technological and organisational, is proposed. New liberalised access to the entire European rail infrastructure network will increase the competition and most probably attract new railway freight service providers. The introduction of the suggested innovative solutions in form of small, self-propelled, bi-directional train formation that can be automatically coupled and decoupled and equipped with the innovative loading and unloading equipment (enabling loading/unloading operations wherever the truck can stay parallel to the train), is to be expected predominantly on the feeder lines (market niches) of the European railways.
Ključne besede: rail freight, EU transport policy, railway freight system, rail freight paradigm, innovative freight technological solutions, transport policy
Objavljeno: 05.06.2017; Ogledov: 84; Prenosov: 5
Celotno besedilo (2,81 MB)
New approach to determining visibility length on passive protected level railroad crossingsDrago Sever
, 2012, kratki znanstveni prispevek
Opis: The paper is based on the question whether the existing (legislation determined) method for determining the visibility length on passive protected level railroad crossings insures the relevant level of traffic safety. It has been recognised that using of such method does not provide stopping of road driver vehicles in front of railroad crossing in all conditions. Based on such conclusion a new approach to determining visibility length on passive protected level railroad crossing is proposed. The new approach is based on the assumption that it is necessary, primarily on level railroad crossings with local roads to recognize the worst possible and expected road and weather conditions. The testing of the proposed method in the real environment has shown that at lower speeds of road vehicles there is almost no difference, and that important benefits are recognised for the speeds of 30 and 50km/h where longer stopping distances of road vehicles have been detected (road vehicle can stop safely in front of a rail crossing) with almost the same visibility lengths. The use of the proposed method could have important impact on the increase of traffic safety on passive protected level railroad crossings.
Ključne besede: traffic safety, visibility field, level railroad crossings
Objavljeno: 05.06.2017; Ogledov: 72; Prenosov: 3
Celotno besedilo (892,41 KB)