This does not seem to be true. According to Wikipedia the Czech Republic has 9567 km of railways. This leaves them with a density of 0.121299336891 Railway/km².
Switzerland, which was listed as the densest in the Article, has 5317 km of railways. This leaves them with a density of 0.128787695288 Railway/km².
This does not seem to be true. According to Wikipedia the Czech Republic has 9567 km of railways. This leaves them with a density of 0.121299336891 Railway/km².
Switzerland, which was listed as the densest in the Article, has 5317 km of railways. This leaves them with a density of 0.128787695288 Railway/km².
https://en.m.wikipedia.org/wiki/List_of_countries_by_rail_transport_network_size
Keep in mind, that the dates of the data collection are 3 years apart (Czechia 2017, Switzerland 2020).