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State Route 37 (SR 37) is a state highway in the northern part of California that runs 21 miles (34 km) along the northern shore of San Pablo Bay. It is built from U.S. Route 101 in Novato and runs through the southern tips of Sonoma and Napa counties to Interstate 80 in Vallejo. It serves as a vital connection between the four counties of the North Bay Area, north of San Francisco; Sonoma Raceway and Six Flags Discovery Kingdom are accessible from Route 37. Route 37 has been proposed to be built to freeway standards since the early 1950s. However, the proposal was met with many economic and environmental obstacles, making the task all but impossible for much of the route. Problems included a levee break in Vallejo which turned part of the land around the highway into a marsh that is home to endangered salt marsh harvest mice, and a section of highway known as "Blood Alley" for its high rate of fatal accidents. == Route description == Intended to run from State Route 251, a highway that has not been constructed, SR 37 begins in Novato with a junction at U.S. Route 101 and heads northeast as a freeway for about a quarter mile before becoming a four-lane expressway. The route passes over the Petaluma River into Sonoma County before meeting the southern terminus of State Route 121 at a signal-controlled intersection near Sears Point and the Sonoma Raceway. The route continues as a divided two-lane expressway in a more easterly, then southeasterly, direction as it crosses Tolay Creek and proceeds through the Napa Sonoma Marsh at the northern edge of San Pablo Bay. Before the construction of the barrier in 1995, this portion of SR 37 was three lanes with the middle lane alternately serving as a passing lane for each direction. This stretch of highway was given the nickname of "Blood Alley" for its high-rate of fatal accidents. With the middle lane removed, accidents dropped dramatically. SR 37 becomes a four-lane freeway on Mare Island, approaching northern Vallejo. After it crosses over the Napa River Bridge, it continues as a freeway, overlapping the old highway alignment and passing north of the old road known as Marine World Parkway (due to its proximity to the Six Flags Discovery Kingdom, previously known as Marine World). SR 37 travels in a northeasterly direction along the White Slough before turning east as it crosses over State Route 29 and heads to its eastern terminus at I-80 as the James Capoot Memorial Highway. In the early 1990s, the stretch between Fairgrounds Drive, which serves as the entrance to Discovery Kingdom, and Mini Drive was upgraded to a freeway. In 2004 and 2005, following over fifty years of complications, the remaining non-freeway section in Vallejo was upgraded as well. Route 37 is also known as Randy Bolt Memorial Highway from Route 29 to Skaggs Road, and Sears Point Toll Road, which was originally a toll road that ran from Route 121 to Vallejo. This route is part of the California Freeway and Expressway System〔(【引用サイトリンク】title=CA Codes (shc:250-257) )〕 and is eligible for the State Scenic Highway System.〔(【引用サイトリンク】title=CA Codes (shc:260-284) )〕 However, it is not designated as a scenic highway by Caltrans. 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 37」の詳細全文を読む スポンサード リンク
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