law passed in July 1999, Caltrans was authorized to relinquish any part of Route 160 within the city limits to Sacramento. The two agencies agreed, and on October 19, 2000, the portion from the south city limits to the American River became the full responsibility of the city. A 2003 amendment to the Streets and Highways Code erroneously deleted not only this part, but the North Sacramento Freeway as well. A project to convert the former southbound-only Richards Boulevard access just south of the American River to a standard signalized intersection was completed in August 2007; this improves access to existing and future development in the area, including redevelopment of a former rail yard, while slowing northbound traffic heading for the bridge and freeway. Another project converting Freeport Boulevard and 21st Street south of Broadway into two-way streets was also completed. 21st Street has carried northbound traffic since 1974, when Caltrans took it over. This will calm traffic while improving the intersection at the south end of the former one-way pair, which the RT Light Rail now crosses 21st Street just to the north of. In addition, the three blocks of F Street that carried southbound SR 160 from 12th Street to 15th Street have been calmed by the addition of a roundabout at 13th Street. In 2012, SR 4 was re-routed to go further south to bypass Oakley and Brentwood. The southern end of SR 160 was then extended south to cover the part of the freeway that is no longer designated as SR 4, from Main Street (where State Route 4 originally exited the freeway) to the fork of the new SR 4 (formerly known as the State Route 4 Bypass, or Bypass Road). In 2014, construction began at the interchange with SR 4 to complete the two remaining ramps that would link southbound SR 160 to eastbound SR 4 and westbound SR 4 to northbound SR 160. Construction was completed in March 2016. Major intersections See also Transportation in the Sacramento metropolitan area References External links Bay Area FasTrak – includes toll information on the Antioch Bridge, and the other Bay Area toll facilities California @ AARoads - California 160 California Highway Conditions: SR 160 California Highways: SR 160 160 160 State Route 160 State Route 160 State Route 160 160 160 Antioch, California U.S. Route 99 U.S. Route 40