In Switzerland, the teachings of Sigfried Giedion’s manifesto Befreites Wohnen (Orell Füssli, 1929) and his subsequent work Time, Space, and Architecture (Harvard University Press, 1941), along with the interpretations by his followers, indicate that petro-modern developments contributed not only to the construction of roads but also to the development of bridges. New housing typologies emerged, including the suburban villa and spacious, low-density row housing, which featured affordable and comfortable flats for all residents. The processes of suburbanisation, promoted by the principles of Neues Bauen, were exemplified by projects such as the Werkbundsiedlung Neubühl (designed by various architects between 1930 and 1932) and the Doldertalhäuser (developed by Alfred and Emil Roth in collaboration with Marcel Breuer from 1935–36), and were significantly facilitated, if not made possible, by advancements in automobility. Additionally, the asphalt road industry, which historically originated in La Presta, Val de Travers, Jura, was complemented by the concrete road industry in the 1920s, exemplified by Holderbank Betonstrassen AG, which operated in Holderbank-Wildegg, AG from 1925 to 1965.