A “bonus” of 5 dB has been applied to railway noise in most European Union (EU) countries, e.g. Austria, Germany, France and Sweden. The reason for this is that the majority of international and Swedish studies show that railway noise is less annoying than road traffic noise and aircraft noise (Miedema & Oudshoorn 2001; EU position paper 2002). According to the meta-analysis (Miedema & Oudshoorn 2001) based on data from a large number of studies the proportion annoyed varies between the different noise sources, e.g. aircraft noise is most annoying (38 %) followed by road traffic (26 %) and railway noise (15 % annoyed) at Lden 60 dB.