Author(s)

J. Madejski

Abstract

The paper explains the need to collect and store track and turnout geometry information and how to determine their condition in the form of synthetic quality coefficients. Catenary data feature an example of the additional line information that can supplement the infrastructure information database. The concept of linespeed dependant track parameter tolerance values is presented. Analysis of the temporal trend of the track and switch geometry change calls for measurement data storage and analysis. The relevant database system is described along with the examples of queries. Real life examples and experience with this methodology of track and switch geometry parameter analysis in Poland and other EU countries are presented. The diagnostic module indicates the "weak locations" in the track, which can be further analysed in detail by the diagnostician. Keywords: track geometry, turnout geometry, track infrastructure database, track recording trolley, track diagnostics. 1 Introduction New projects related to light rail, metro, and trams are ongoing all over the world. The key is to promote the development of attractive alternatives to the use of private cars in cities, reducing congestion and pollution through new technologies, innovative planning measures, enhanced energy efficiency and the use of alternative fuels. These means of transport have zero emissions and – in case of trams are seen to discipline other traffic. The aforementioned projects include developing new lines, rebuilding some tram lines and converting them to

Keywords

track geometry, turnout geometry, track infrastructure database, track recording trolley, track diagnostics.