Cologne–Aachen high-speed railway

The Cologne–Aachen high-speed line is the German part of the Trans-European transport networks project high-speed line Paris–Brussels–Cologne. It is not a newly built railway line, but a project to upgrade the existing railway line which was opened in 1841 by the Rhenish Railway Company.

Source: Wikipedia — Cologne–Aachen high-speed railway (CC BY-SA 4.0)