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Transportation in Salt Lake City consists of a wide network of roads, an extensive bus system, a light rail system, and a recently introduced commuter rail line. Although Salt Lake City, Utah is a traditionally car-oriented city (as are most other cities in the United States), the rapidly growing public transit system has a high number of riders for a city of its size, and public transit is widely supported by the populace. All public transit in the city is operated by the Utah Transit Authority. In addition to operating the bus system, they also operate the TRAX light rail system, which contains three lines, the first of which runs from downtown south to Sandy (but soon to Draper), the second runs from University of Utah southwest to South Jordan, and the third from downtown Salt Lake City southwest to West Valley City and west to the Salt Lake City International Airport. (By August 2013, the extension from Sandy to Draper is expected to open for service.) A recently completed commuter rail line, called ''FrontRunner'', runs north through Davis County to Pleasant View in north Weber County and south to Provo in central Utah County. The road system is also extensive, with 3 interstate highways and an additional state freeway. However, the geographical constrictions of the valley, as well as its rapid growth, has led to severe congestion problems. ==Roads== Two major interstate highways, Interstate 15 and Interstate 80, intersect just west of downtown. I-15 comes in from Davis County on the north and heads straight south through the Salt Lake Valley to Utah County. I-80 comes in from Tooele County on the west and passes the Salt Lake City International Airport before merging with I-15 west of downtown. The merge continues south for about before I-80 splits east again. It passes through largely residential areas through northern South Salt Lake and the Sugar House neighborhood of Salt Lake City before entering Parley's Canyon and then entering Summit County. Interstate 215, known as the "Belt Route", forms a 270° loop around Salt Lake City and its first-ring suburbs. It enters the Rose Park neighborhood in northwestern Salt Lake City from Davis County (where it recently split from I-15) and continues south, intersecting I-80 and State Route 201 before turning east in Taylorsville, intersecting I-15 in Murray, and turning north in Holladay. From there it parallels the Wasatch Range through the affleunt residential eastern suburbs before ending at I-80 at the mouth of Parley's Canyon. This belt route largely serves as a commuter route for the suburbs. The 2002 Winter Olympics prompted an urgent acceleration of the already planned massive overhaul of I-15, from 600 North in Salt Lake City to 10600 South in Sandy. The interstate was expanded to 10 lanes, including 2 high-occupancy vehicle (HOV/express) lanes. Portions of I-80 and I-215 were also reconstructed. Since original construction, the HOV lanes have been evolved to what the Utah Department of Transportation (UDOT) refers to as Express Lanes. These Express Lanes, also known as High-occupancy toll lanes (HOT lanes) are for use by vehicles with two or more persons (including buses), motorcycles, and clean-fuel vehicles. Other vehicles can also use the lanes if they use an Express Pass. The Express Pass allows for automatice electronic toll collection. Tolls vary by distance driven in the lanes and current traffic congestion. State Route 201, known locally as the "21st South Freeway" or as "201", is a freeway that heads westward from the southern I-80/I-15 junction, known as the "Spaghetti Bowl", along the border of Salt Lake City and West Valley City. This is a largely congested route that serves much of the west side commuter traffic. As it dips southward into Magna, it is downgraded to an expressway, although it is eventually planned to be upgraded to a freeway as traffic from Tooele County increases. It continues westward to I-80 near the Tooele County line. In addition to serving the westside of the valley SR-201 also serves as a commuter freeway for Tooele County and an alternative to I-80 when needed. Bangerter Highway (State Route 154) is an expressway that serves the quickly growing west and south sides of the valley. It begins near I-15 in Draper then heads west through Bluffdale and Riverton before heading north along the west side of the valley through South Jordan, West Jordan, West Valley City, and Salt Lake City before crossing over I-80 and ending at the Salt Lake City International Airport. Another expressway, that will eventually become a freeway, is the Mountain View Corridor (() and a section of the Legacy Highway project) which will run from Utah County along the west side of the valley until it reaches I-80. So far only the frontage road portion of the section that runs from Redwood Road (SR-68) at about 16000 South north to 5400 South (SR-73) at 6400 West has been completed. However, these frontage roads will function as a four lane divided expressway until the freeway is completed. Another major roadway through the valley is State Street, which is the portion of US-89 that shoots arrow-straight south through the valley from Downtown Salt Lake City to Draper, before connecting with I-15. 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「Transportation in Salt Lake City」の詳細全文を読む スポンサード リンク
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