In 1937, the northwestern section of the former Reichsstraße6 (R6) was extended from Bremerhaven (Wesermünde) to Cuxhaven. Before World War II and the implementation of the Oder–Neisse line, the R6 road continued southeastwards from Görlitz via Hirschberg (present-day Jelenia Góra, Poland) and Schweidnitz (Świdnica) to the Silesian capital Breslau (Wrocław) and from there via Oels (Oleśnica) as far as the former Polish border near Groß Wartenberg (Syców). The sections between Görlitz/Zgorzelec and Syców then became part of the Polish National road 4 (today largely replaced by the A4 autostrada) and the National road 8.