Systemvergleich der Oberbauformen von straßenabhängigen Bahnen

Luke Meysner, Benno Schmieder, Norbert Ostermann
The superstructure is a key element of tramway infrastructure. It consists of many parts that are grouped and separately classified. The aim of this paper is to compare the different types of superstructure typically used in urban tram systems and to develop an aide for the choice of superstructure under different circumstances.First and fore most, technical literature is used to classify the elements of the superstructure. Adistinction is primarily made between a ballasted track and a
more » ... rack and a ballastless (or slab) track. Ballastsuperstructures are mainly used as an open superstructure without a surface covering, whilstslab tracks can be designed with a closed superstructure or with track greening.Furthermore, the relevant criteria for the choice of superstructure are discussed. If other parties(e.g. cars, buses, pedestrians) use the track, then only closed superstructures with a covering of asphalt, concrete, paving or prefabricated parts are possible. For sections without external access,ballasted tracks or slab tracks with track greening can also be used.During the decision-making process, there are always several types of superstructure to choosefrom, which must be compared using a suitable tool. Utility value analysis turns out to be aparticularly good method for analysing the situation because it enables non-monetary criteria to be taken into account.Types of superstructure are compared using the criteria of life cycle costs, noise emissions,urban environment and ecology. Life cycle costs represent the costs of a superstructure over its entire service life; noise emission criteria take into account airborne and structure-borne noise emissions from both rail and road traffic; the criteria urban is determined by the suitability of the superstructure in its urban environment; a life cycle assessment is used for the ecologicalcriteria.Finally, the research results are applied to the Vienna tram network using two case studies. The findings of this thesis serve to compare the advantages and disadvantages of each type of [...]
doi:10.34726/hss.2020.79100 fatcat:cmhmogpkljfifnmbrwg5e2fr2a