The German Wehrmacht assumed that the majority of the Soviet military supplies and the main part of the food and population potential of the Soviet Union existed in the lands that lay to the west of the proposed A-A line.
This was intended as only a first step towards establishing the so-called A-A line from Arkhangelsk to Astrakhan (both located in Russia) as Germany's new eastern border.
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The Oberhausen Station was also at the beginning of a line opened on 20 October 1856 to Arnhem via Wesel and Emmerich am Rhein, popularly known as the Holland line.
The extension of the Prague Metro's A line from Dejvická to Motol, planned to open in 2014, will include a station at Petřiny.
A line was opened to Sant'Antonio Mantovano north of the Mincio river near Mantua in 1853 and was connected through to Modena in 1874, where it connected with the line to Bologna.