The Southerly Extension of the Arroyo Seco Parkway supplemented the Figueroa Street Viaduct and Tunnels with a new southbound roadway to the west, and converted Figueroa Street to freeway standards south to Adobe Street. The new Los Angeles River Bridge left the existing road north of the original viaduct terminus at Figueroa Street, and crossed over the ramp to Figueroa Street, the Los Angeles River, and the northbound exit to Riverside Drive (now a ramp to Interstate 5 north, although Riverside Drive is still accessible from this ramp). Through Elysian Park, it was built higher than the tunnels, with open-cuts through the ridges through which the older tunnels were built, and viaducts over the valleys between the ridges. South of the southernmost tunnel, the older road was widened and upgraded to freeway standards south to Adobe Street. This new road opened December 30, 1943. A further extension was completed on September 22, 1953 to the Four Level Interchange with U.S. Route 101 (Santa Ana Freeway and Hollywood Freeway).