Two bascule bridges—the Paintersville Bridge and Isleton Bridge—replaced the free ferries in 1923, and are of a type patented by Joseph B. Strauss, who went on to design the Golden Gate Bridge. Local businessmen Aven Hanford and Oscar Klatt replaced the toll ferry with the tolled Antioch Bridge in mid-1926, almost a year before they opened the larger Carquinez Bridge to the west. The counties of Contra Costa and Sacramento organized a joint highway district in November 1925 to fund an improvement of the northern approach from Rio Vista; the concrete highway was completed in July 1927, creating a fully paved continuous route between Sacramento and the bay.