According to the plans of Professor Johannes Mährlen, an adviser to King William I, and Otto Elben, a Member of the Oberamt Böblingen, a railway junction would be built at Böblingen,with lines running to Calw, Horb and Tübingen.
The following towns and communities border on Horb am Neckar, listing them in clockwise order starting in the east: Starzach (in Landkreis Tübingen), Haigerloch (Zollernalbkreis), Empfingen (Landkreis Freudenstadt), Sulz am Neckar (Landkreis Rottweil), Glatten, Schopfloch and Waldachtal (all in Landkreis Freudenstadt), and finally Haiterbach and Nagold, both in Landkreis Calw).
Between Calw and Horb, long-distance trains from Stuttgart also ran on the Württemberg Black Forest Railway to Singen and from there to Lake Constance or Schaffhausen.
His team reached Horb three days later and headed for Haigerloch while the French troops occupied themselves with looking for members of the Vichy Government in nearby Sigmaringen.