To connect the proposed parkway with downtown Los Angeles, that city improved and extended North Figueroa Street as a four-lane road to the Los Angeles River, allowing drivers to bypass the congested North Broadway Bridge on the existing but underutilized Riverside Drive Bridge. A large part of the project lay within Elysian Park, and four Art Deco tunnels were built through the hills. The first three, between Solano Avenue and the river, opened in late 1931, and the fourth opened in mid-1936, completing the extension of Figueroa Street to Riverside Drive. As with the contemporary Ramona Boulevard east from downtown, grade separations were mostly built only where terrain dictated. For Figueroa Street, this meant that all crossings except College Street (built several years after the extension was completed), where a hill was cut through, were at grade. The Figueroa Street Viaduct, connecting the Riverside Drive intersection with North Figueroa Street (then Dayton Avenue) across the Los Angeles River, opened in mid-1937. Closer to downtown, an interchange was built at Temple Street in 1939.