 Increasing traffic loads during the early-20th century, resulted in over 20 proposals for a long bridge passing through central Stockholm over Gamla stan.Discussions in 1930 ending up in a temporary solution, by its customers dubbed "Slingerbultsleden" ("Dodge Route"), leading the north-bound through traffic around Riddarhustorget by means of two bridges to and from Riddarholmen.By the end of the 1950s, the southern bridge of the present more permanent solution Centralbron was completed, a few years later accompanied by its northern extension.