Baden Mainline
In May 1845 a new committee was formed under the leadership of the Zurich industrialist Martin Escher. The planned line would now keep to the south bank of the Limmat, which it would only cross at Turgi. Finally, it was planned to cross the Rhine between Koblenz and Waldshut (then in the state of Baden) to connect with the planned Baden Mainline between Basel and Konstanz. With an assurance that Alois Negrelli would direct the engineering and that a branch line would be later built from Baden to Lenzburg and Aarau, the Aargau parliament approved the project in July 1845. The first stage of construction would be the section from Zurich to Baden. The gauge of was chosen, the same gauge as the German Grand Duchy of Baden State Railway, which was also constructed during that time