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State Route 190 (SR 190) is a state highway in the U.S. state of California that is split into two parts by the Sierra Nevada. The western portion of begins at Tipton at a junction with State Route 99 and heads east towards Porterville before ending at Quaking Aspen in the Sequoia National Forest. The eastern portion begins at US 395 at Olancha, heads east through Death Valley National Park, and ends at State Route 127 at Death Valley Junction. The 43.0-mile〔California Department of Transportation, (Traversible Highways Report 2002 ) (), accessed January 2008〕 (69.2 km) portion over the Sierra Nevada remains unconstructed, and the California Department of Transportation (Caltrans) has no plans to build it through the wilderness areas.〔 The route east of State Route 136 near Keeler is on the California Freeway and Expressway System, but is a two-lane road. Except west of State Route 65 in Porterville, SR 190 is eligible for the State Scenic Highway System; the part within Death Valley National Park, known as the Death Valley Scenic Byway, has been added to the system and is a National Scenic Byway.〔California Department of Transportation, California Scenic Highway Mapping System: (Tulare County ) and (Inyo County ), accessed January 2008〕 ==Route description== State Route 190 begins at State Route 99 just south of downtown Tipton in Tulare County and heads straight east along the flat San Joaquin Valley on Avenue 144. There is a short expressway segment in Porterville, including a cloverleaf interchange at State Route 65 and a partial interchange at Main Street, after which the highway begins to curve alongside the Tule River, passing the south side of Lake Success, as the terrain becomes more rugged. Following the river, it meets the south end of County Route J37, an access road to Balch Park in the Mountain Home State Forest, at the forks of the river near the community of Springville. SR 190 continues east near the Middle Fork and South Fork Middle Fork Tule River to near Camp Nelson, where it begins rising into the foothills, going around many hairpin curves in order to rise to Quaking Aspen, the source of the South Fork Middle Fork and the end of the western segment of SR 190. The county-maintained Western Divide Highway continues south to a point west of Johnsondale, where traffic can turn east to reach US 395 via Sherman Pass and County Route J41.〔California Department of Transportation District 6, (State Route 190 Transportation Concept Report ), February 2007, accessed January 2008〕〔Google Maps street maps and USGS topographic maps, accessed January 2008 via (ACME Mapper )〕 From Quaking Aspen across the Sierra Nevada to Olancha, Caltrans has adopted a proposed alignment, but is unlikely to build it, in part due to two protected wilderness areas—the Golden Trout Wilderness and South Sierra Wilderness—along the route. The unconstructed routing heads northeast from Quaking Aspen, cresting a small summit before following Freeman Creek easterly past the Freeman Creek Grove, crossing the Kern River near its forks, and then using the path of Rattlesnake Creek and Beach Creek to the Beach Meadows area. Crossing several ridges to the northeast, SR 190 would make its way to the South Fork Kern River near Monache Mountain, then heading southeast along that waterway to the vicinity of Haiwee Pass. That pass, elevation about 8200 feet (2500 m) above sea level, would take the highway over the Sierra crest into Inyo County, dropping for 12.0 miles (19.3 km) in a north-northeasterly direction to US 395 at Olancha (elevation 3650 feet/1100 m).〔〔California Department of Transportation District 9, (State Route 190 Transportation Concept Report ), 2003, accessed January 2008〕 The eastern section of SR 190 begins at Olancha in the Owens Valley, at the intersection with US 395. The route heads northeast along the southeast side of Owens Lake to the junction with SR 136 southeast of Keeler, where it turns southeast and east around the south side of the Inyo Mountains. After passing the turnoff to Darwin, SR 190 enters Death Valley National Park and becomes curvier as it heads down into the Panamint Valley. The highway crosses the valley and then turns northeast over Towne Pass and into the northern part of Death Valley at Stovepipe Wells. Within the valley, at the intersection with North Highway, which leads to Scotty's Castle and Beatty, Nevada, SR 190 turns southeast through Death Valley, which it remains inside until the turnoff to Badwater Basin, the lowest point in North America, near the settlement of Furnace Creek. It leaves the valley to the southeast alongside Furnace Creek Wash, where the highway is usually closed at least once a year by flash floods. SR 190 turns east away from the wash at the turnoff to Dante's View, and soon leaves the park, after which it follows a mostly straight alignment to its end at State Route 127 at Death Valley Junction.〔〔 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 190」の詳細全文を読む スポンサード リンク
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