As a result of the Austro-Prussian War of 1866, Nassau became part of Prussia, changing the situation in the Rhine completely.
Emil Langen, board member of the Rhenish Railway and director of Friedrich-Wilhelms Ironworks in Troisdorf (now the location of the suburb and station of Troisdorf-Friedrich-Wilhelms-Hütte), finally implemented a change in the planned route north of Beuel.