“…Rokicki and Stępniak (2018) applied the potential accessibility index for Poland to verify the overall effect of the major investments in transport infrastructure accomplished between 2004 and 2014. Similar studies were conducted, inter alia, by , Rosik et al (2013), Komornicki et al (2010Komornicki et al ( , 2015Komornicki et al ( , 2017, Rosik, Stępniak and Komornicki (2015), Stępniak and Rosik (2013, Śleszyński and Kretowicz (2016), Bul (2016), Wiskulski and Taraszkiewicz (2015). This approach has also been employed for the public transport subsystem, where changes in accessibility were analysed, for instance, to assess whether the decisions taken on the location of certain infrastructure were correct (Gadziński and Beim 2009, Wolański 2010, Puławska and Starowicz 2011, Koźlak 2012, Kwarciński 2013, Goliszek 2014ab, 2016, Goliszek and Połom 2016ab, Guzik 2016, Malasek 2017.…”