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Introduction It is recognized that hard factors such as travel time, cost, availability of public transport services, and car ownership have a major impact when people consider the choice between using an automobile or public transport. Nevertheless, there is evidence from the literature that rail-based public transport often is considered superior to bus systems, even in cases where quantitative hard factors are equal. This attraction of passengers is known as a psychological rail factor, and it is used to express a higher attraction in terms of higher ridership of rail-based public transport in contrast to bus services (Axhausen et al. 2001; Megel 2001b; Ben-Akiva and Morikawa 2002; Vuchic 2005; Scherer 2010a). The existence of this rail factor is widely accepted among experts, but little evidence exists about the reasons for this phenomena. The idea of a rail factor is consistent with statements that the image of a transport system has an impact on demand. Furthermore, research…