Ingår i projektet Gröna tåget

An important topic within railway engineering is track irregularities, i.e. the geometrical deviations from an ideal track alignment. This is of special interest to high-speed operations. Depending on how the track is aligned, different responses will be recorded in a passing vehicle, such as dynamic impact forces as well as motions, jerks and vibration. Track irregularities are surveyed and corrected on a regular basis according to appropriate standards. This report covers firstly a literature survey done to investigate the current standards, both national and international. Secondly the current report presents an evaluation of track irregularities and on-track tests, carried out 2008 within the "Gröna tåget" (Green Train) research programme in Sweden, where vehicle responses are correlated to track irregularities. Both parts are important for recommendations on an updated track geometry quality standard that covers higher speeds than today's maximum of 200 km/h in Sweden.