The extensive track layouts of a former postal distribution centre and a former SBB freight depot, which is now operated privately as a "Cargo Service Center", lie to the south of the line between Dulliken and Däniken.

This was also the recommendation of a report, which was produced in 1850 by the well-known English railway engineers Robert Stephenson and Henry Swinburne.

The Zurich preference was not carried out (at least for the time being), since after the completion of the Swiss Northern Railway (Spanisch-Brötli-Bahn), there were financial problems.

However, since the Swiss Northeastern Railway had not completed its line from Baden, it initially built a temporary station in Schachen Aarau.

Once the Northeastern Railway had completed the Aarau City Tunnel in June 1858—the line from Baden had meanwhile also reached Aarau—continuous operations were possible on the Olten–Aarau–Zürich route.

The electrification with the usual Swiss Federal Railways (SBB) 15 kV 16 2/3 Hz system was completed on 21 January 1925.