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In the U.S. state of California, U.S. Route 50 (US 50) runs east from I-80 in West Sacramento to the Nevada state line in South Lake Tahoe. Portions within Sacramento are known as the Capital City Freeway and El Dorado Freeway. The western half of the highway in California, from I-80 through Sacramento and Placerville to Exit 60 in Pollock Pines is a four-or-more-lane divided highway, mostly built to freeway standards. US 50 continues as an undivided highway with one eastbound lane and two westbound lanes until it reaches the canyon of the South Fork American River at Riverton. The remainder of the highway, which climbs along and out of the canyon, then over the Sierra Nevada at Echo Summit and into the Lake Tahoe Basin, is a mainly two-lane road. The US 50 corridor is a historic one, used by many 49ers who came to California during the Gold Rush as well as the Pony Express. In 1895, part of the present-day route was designated as California's first state highway, and it was later considered as a scenic alternate of the Lincoln Highway. Much of US 50 was constructed during the initial construction of the California state highway system. During the second half of the twentieth century, US 50 was gradually designated and converted into a modern highway. ==Route description== US 50 has been added to the California Freeway and Expressway System by the state legislature. The highway east of SR 49 is eligible for the State Scenic Highway System, and has been recognized as such except within the South Lake Tahoe city limits. US 50 begins in West Sacramento, where I-80 leaves the West Sacramento Freeway onto a bypass of Sacramento. The old route of I-80 through Sacramento is signed as Business 80 (Capital City Freeway), which overlaps US 50 on the West Sacramento Freeway to the split with SR 275, then over the Sacramento River on the Pioneer Memorial Bridge and across I-5 to SR 99. US 50 is part Interstate Highway as well, carrying the unsigned designation of Interstate 305 through its interchange with SR 99. There Business 80 splits to the north, SR 99 heads south, and US 50 continues east as the El Dorado Freeway. This freeway parallels Folsom Boulevard and the American River east-northeasterly through the suburb of Rancho Cordova to Folsom. Entering El Dorado, US 50 continues eastward through the foothills of the Sierra Nevada via El Dorado Hills, Cameron Park, and Shingle Springs to downtown Placerville. The freeway temporarily ends, and US 50 has several at-grade intersections in Placerville, including SR 49. Leaving Placerville, the freeway restarts, only to end several miles later. The final section of freeway begins as a bypass of Camino, and ends at Exit 60 at the east end of Pollock Pines. Just east of Exit 60, US 50 continues as an undivided conventional highway with one eastbound lane and two westbound lanes, entering the river canyon of the South Fork American River near Riverton and crossing to the north side of the river near Ice House Road. From Ice House Road to the crest of the Sierras, US 50 is a steadily rising mostly two-lane road, staying just north of the river except for a 1995 cutoff that crosses the river twice in quick succession west of Kyburz, the boyhood home of ski racer Spider Sabich. Several hairpin turns take the highway up a grade east of Strawberry, after which US 50 continues east alongside the river to its source at Echo Summit. Echo Summit is the highest elevation U.S. Route 50 reaches in California at . From Echo Summit down to the Lake Tahoe Basin, the roadway slowly descends the side of a steep hill; it then curves northeast to its south junction with SR 89 (which heads south to Luther Pass) beginning co-signing of SR 89, and then turns northward near the city of South Lake Tahoe. Where US 50 and SR 89 split, at an intersection known as "The Y", the former turns east on the four-lane Lake Tahoe Boulevard, which it follows to and along the south shore of Lake Tahoe, then it enters the state of Nevada. 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「U.S. Route 50 in California」の詳細全文を読む スポンサード リンク
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