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State Route 160 is a state highway in the U.S. state of California consisting of two sections. The longer, southern, section is a scenic highway through the alluvial plain of the Sacramento River, linking SR 4 in Antioch with Sacramento via the Antioch Bridge. The northern section, separated by the southern by Sacramento city streets, is the North Sacramento Freeway, running from the 16th Street Bridge over the American River to Interstate 80 Business towards Roseville. This northern section was deleted from the definition in the Streets and Highways Code in 2003, when the relinquished portion through downtown Sacramento was also removed, but it is still maintained and signed by the California Department of Transportation (Caltrans) as SR 160. This portion is also part of the California Freeway and Expressway System, as is the piece south of SR 12 near Rio Vista, though, of the latter, only the southernmost piece in Antioch is built to freeway standards. The entire southern portion, from SR 4 to Sacramento, is part of the State Scenic Highway System. ==Route description== State Route 160 begins in eastern Antioch at SR 4. After two interchanges, the highway rises onto the two lane Antioch Bridge over the San Joaquin River. It cuts north across the center of Sherman Island, reaching the Sacramento River on the opposite shore. From here to Sacramento, SR 160 never strays far from the river, first following the east levee over the 1949〔 Three Mile Slough Bridge (a lift bridge), past Brannan Island State Recreation Area, and across SR 12 opposite the river from Rio Vista. After passing Isleton, the highway crosses the river on the Isleton Bridge, a bascule bridge built in 1923,〔 and runs along the west shore on Grand Island, where it meets the east end of SR 220. The Walnut Grove Bridge carries County Route J11 east across the river to Walnut Grove, and, at the north end of the island, SR 160 crosses the 1924〔 Steamboat Slough Bridge onto Sutter Island and then the 1923〔 Paintersville Bridge across the Sacramento River to the mainland, both bascule bridges.〔Google Maps street maps and USGS topographic maps, accessed December 2007 via (ACME Mapper )〕 On the mainland, SR 160 once again runs atop the east levee, now 1–2 miles (1.5–3 km) west of Interstate 5. The final bridge over the river is the Freeport Bridge, which carries County Route E9 to the west levee, where it turns south to return to SR 160 at the west end of the Paintersville Bridge. About a mile (1.5 km) beyond the Freeport Bridge, SR 160 leaves the levee, enters the city of Sacramento (where state maintenance and control ends), passes under I-5, and farms give way to suburbs. Here the former SR 160 is known as Freeport Boulevard, a major surface road that passes the Sacramento Executive Airport and Sacramento City College. Freeport Boulevard turns to the northwest at about 4th Avenue. It was formerly a one-way pair with 21st Street with Freeport heading one-way southbound and 21st heading one-way northbound. The city converted these streets back to two-way streets for traffic calming purposes in 2008. After a short jog west on Broadway, former SR 160 turns north on the one-way pair of 15th (southbound) and 16th (northbound) Streets, almost immediately crossing Business 80 and entering downtown Sacramento.〔 15th and 16th Streets lead traffic north past the east side of the State Capitol grounds, which lie between L and N Streets. At F Street, the path of southbound SR 160 jogged west for three blocks to 12th Street; both 12th and 16th Streets pass under the Union Pacific Railroad's Martinez Subdivision (where B Street would be) in four-lane subways, but 15th Street dead-ends. 12th Street remains a one-way southbound roadway, but the two-way RT Light Rail now occupies its east side. 12th Street turns northeast at North B Street, and the two directions of former SR 160 come together at Richards Boulevard, just south of the 16th Street Bridge over the American River and the south end of the state-maintained North Sacramento Freeway. The light rail, which crosses the river between the two directions of SR 160, soon leaves at the Del Paso Boulevard interchange as the freeway turns east. Two folded diamonds at local streets and a northbound-only entrance ramp from Tribute Road are all that remains before SR 160 merges with Business 80 at the Arden Way interchange. Business 80 is now known as the Capital City Freeway here.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「California State Route 160」の詳細全文を読む スポンサード リンク
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