Interstate 15 - Citizendia

Interstate 15
Main route of the Interstate Highway System

Length:

1433. The Dwight D Eisenhower National System of Interstate and Defense Highways, commonly called the Interstate Highway System (or simply the Interstate System) 52 mi^[1] (2307. A mile is a unit of Length, usually used to measure Distance, in a number of different systems including Imperial units United States 03 km)

Formed:

1957

South end:

I-8 in San Diego, CA

Major
junctions:

I-10 in Ontario, CA

I-40 in Barstow, CA

US 95 in Las Vegas, NV

I-70 near Cove Fort, UT

I-80 in Salt Lake City, UT

I-90 near Butte, MT

North end:

AB 4 at Canadian border near Sweetgrass, MT

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Interstate 15

"I-15" redirects here. The kilometre ( American spelling: kilometer) symbol km is a unit of Length in the Metric system, equal to one thousand In the US state of California, Interstate 10, the major east-west Interstate Highway in the Southern United States, runs east from Interstate 40 (I-40 is a major west-east Interstate highway in the United States Barstow is a city in San Bernardino County, California, United States. US Route 95 is a north-south United States highway. Unlike many other US highways it has not seen deletion or replacement on most of the course caused by an encroaching Las Vegas ( Spanish: "The Meadows" is the most populous City in the state of Nevada, the seat of Clark County, and an internationally Interstate 70 (I-70 is an Interstate highway in the United States that runs from Interstate 15 near Cove Fort Utah, to a Park and Ride Cove Fort is a Fort and historical site located in Millard County Utah. Interstate 80 (I-80 is the second-longest Interstate Highway in the United States (after I-90) Salt Lake City is the Capital and the most populous city of the U Interstate 90 (I-90 is the longest interstate highway in the United States at nearly 3100 miles (5000 kilometers Butte (IPA) is a city in and the County seat of Silver Bow County, Montana, United States. Highway 4 forms the most southern leg of the CANAMEX Corridor highway system in Alberta. The Canada – United States border is the international Border between Canada and the United States. For the Soviet fighter aircraft, see Polikarpov I-15. WikipediaWikiProject Aircraft. Please see WikipediaWikiProject Aircraft/page content for recommended layout

Interstate 15 (abbreviated I-15) is the fourth-longest north-south transcontinental interstate highway in the United States, traveling through the states of California, Nevada, Arizona, Utah, Idaho, and Montana. The Dwight D Eisenhower National System of Interstate and Defense Highways, commonly called the Interstate Highway System (or simply the Interstate System) The United States of America —commonly referred to as the California ( is a US state on the West Coast of the United States, along the Pacific Ocean. Nevada ( is a state located in the western region of the United States of America. The State of Arizona ( is a state located in the southwestern region of the United States. The State of Utah (ˈjuːtɔː or) is a western state of the United States. The State of Idaho ( is a state in the Pacific Northwest region of the United States of America. Montana ( is a state in the Western United States. One-third of the state in the western part contains numerous mountain ranges (approximately 77 named of the northern The Utah and Arizona portions have been officially designated the 'Veterans Memorial Highway'. ^[2]

Since I-15's inception, it has served as a long-haul route for North American commerce. It is now officially chartered for this purpose. From the junction of Interstate 515 in Las Vegas to the Canadian border I-15 forms part of the CANAMEX Corridor, a High Priority Corridor, as a result of the North American Free Trade Agreement. Interstate 515 (I-515 is a spur of Interstate 15 that runs from the junction of I-15 US 93 and US 95 (the "Spaghetti Bowl" Interchange Las Vegas ( Spanish: "The Meadows" is the most populous City in the state of Nevada, the seat of Clark County, and an internationally The CANAMEX corridor is a corridor linking Canada to Mexico through the United States. The Intermodal Surface Transportation Efficiency Act of 1991 (Public Law 102-240 ISTEA, pronounced Ice-Tea) is a United States federal law that posed a ^[3]

Local portions were built to connect the Inland Empire with San Diego in California, facilitate tourism access to Las Vegas, interconnect all of the Metropolitan Statistical Areas in Utah except Logan, and provide freeway bypasses for Pocatello, Idaho Falls and Great Falls. The Inland Empire is a region mainly located in the Riverside and San Bernardino counties of Southern California and generally encompasses the Table of United States Metropolitan Statistical Areas|Table of United States Core Based Statistical AreasIn the United States, the Office of Management and Budget (OMB has produced Logan is a city in Cache County, Utah, in the United States. As of the 2000 census, the city population was 42670 a substantial increase Pocatello (ˌpoʊkəˈtɛloʊ is the County seat and largest city of Bannock County, with a small portion on the Fort Hall Indian Reservation in neighboring Idaho Falls is the County seat and largest city of Bonneville County, Idaho, United States. Great Falls is a city in and the County seat of Cascade County, Montana, United States.

Since I-15's initial construction, California, Nevada, and Utah have consistently ranked in the fastest growing areas of the United States. As a result, the I-15 corridor has substantially increased in population and commuter traffic has increased the traffic burden on the freeway. Current population estimates are that more than 75 percent of the Utah's population^[4], 19 percent of California's population, and more than 70 percent of Nevada's population^[5] live in counties where Interstate 15 is the primary transportation corridor. Similarly, in California, I-15 is seeing more commuter traffic due to the growth of the Mojave Desert communities of Victorville and Barstow, California. For the indigenous American tribe see Mohave. The Mojave Desert (moʊˈhɑːvi or /məˈhɑːvi/ ( Hayikwiir Mat'aar in Mojave Victorville is a city located in the Victor Valley of western San Bernardino County, California, US Barstow is a city in San Bernardino County, California, United States. In all of these states, I-15 has recently been or is currently in the process of being upgraded to increase capacity. ^[6]^[7]^[8] The Arizona, Idaho and Montana portions have retained their rural, long-haul character. Although Arizona has also grown substantially since I-15's inception, I-15 only serves an isolated corner of the state. The Arizona Strip is the part of the US state of Arizona lying north of the Colorado River.

Due to this rapid area growth, the I-15 corridor is the focus of several mass transit projects. The Las Vegas Monorail, FrontRunner commuter rail system and TRAX light rail in Salt Lake City are mass transit lines loosely parallel to I-15 that are now in operation. The Robert N Broadbent Las Vegas Monorail (formerly MGM Grand-Bally's Monorail) is a 3 FrontRunner is a commuter rail line recently completed by the Utah Transit Authority (UTA to serve the Wasatch Front area of Utah, Commuter rail, regional rail or suburban rail is a Passenger rail transport service between a city center and outer suburbs and Commuter towns TRAX (full name Transit Express, though rarely used is a two-line Light rail system in Utah 's Salt Lake Valley, serving Salt Lake City For specific light rail systems many of which use the words "light rail" as part of their name see List of light-rail transit systems. Salt Lake City is the Capital and the most populous city of the U Between Los Angeles and Las Vegas has long been proposed as a maglev train route; in 2004 the California-Nevada Interstate Maglev project held public meetings on the plan. MAGLEV, or magnetic levitation, is a system of transportation that suspends guides and (usually propels vehicles predominantly trains using magnetic forces The California-Nevada Interstate Maglev project is proposing the construction of a 269-mile Maglev Train line from Las Vegas Nevada to Anaheim California ^[9]

Route description

Lengths
	mi	km
CA	287	462
NV	124	200
AZ	29	47
UT	401	645
ID	196	315
MT	396	637
Total	1,433	2,307

Major cities Bolded cities are officially-designated control cities for signs
San Diego, California Riverside, California San Bernardino, California Los Angeles, California (via Interstate 10) Barstow, California (California only, Nevada uses Los Angeles as the control city south of Las Vegas) Baker, California (As seen on signs between Barstow and Baker) Las Vegas, Nevada St. George, Utah Provo, Utah Salt Lake City, Utah Ogden, Utah Pocatello, Idaho Idaho Falls, Idaho Butte, Montana Helena, Montana Great Falls, Montana Shelby, Montana Lethbridge, Alberta

This highway's southern terminus is in San Diego, California at Interstate 8, 18 miles (29 km) north of the international border with Mexico. A mile is a unit of Length, usually used to measure Distance, in a number of different systems including Imperial units United States The kilometre ( American spelling: kilometer) symbol km is a unit of Length in the Metric system, equal to one thousand In the US state of California, Interstate 15 is a major north-south route through the San Bernardino, Riverside, and San Diego Route description Motorists in California leave the mountainous Mohave Desert and begin a long descent through Ivanpah Valley and Ivanpah Dry Interstate 15 (I-15 a transcontinental Interstate Highway from San Diego California to the Canadian border, passes through Mohave County in In the US state of Utah, Interstate 15 runs north-south through the southwestern and central portions of the state passing through many of the population centers Interstate 15 in Idaho is known for beautiful landscapes along the freeway in the state Interstate 15 in Montana continues onward from Idaho through nearly 400 miles (640 km of Montana through the cities of Butte, Helena A control city is a city or locality posted on a Traffic sign indicating forward destinations on a certain route Riverside is the County seat of Riverside County, California, United States. Los Angeles (lɑˈsændʒələs los ˈaŋxeles in Spanish) is the largest City in the state of California and the American West Interstate 10 ( I-10) is the southernmost east-west coast-to-coast Interstate highway in the United States. Barstow is a city in San Bernardino County, California, United States. Baker is an unincorporated community located in San Bernardino County, California, USA Las Vegas ( Spanish: "The Meadows" is the most populous City in the state of Nevada, the seat of Clark County, and an internationally St George is a city located in the southwestern part of the U Provo is a city in and the County seat Salt Lake City is the Capital and the most populous city of the U Ogden is a city in and the County seat of Weber County, Utah, United States. Pocatello (ˌpoʊkəˈtɛloʊ is the County seat and largest city of Bannock County, with a small portion on the Fort Hall Indian Reservation in neighboring Idaho Falls is the County seat and largest city of Bonneville County, Idaho, United States. Butte (IPA) is a city in and the County seat of Silver Bow County, Montana, United States. Helena (ˈhɛlɨnə is the Capital city of the US state of Montana and the County seat of Lewis and Clark County Great Falls is a city in and the County seat of Cascade County, Montana, United States. Shelby is a city in and the County seat of Toole County, Montana, United States. Lethbridge (ˈlɛθbrɨdʒ is a city in the province of Alberta, Canada and the largest city in Southern Alberta. However, work is being done to extend this to Interstate 5. Interstate 5 (I-5 is the main Interstate highway on the West Coast of the United States, paralleling the Pacific Ocean from Canada to Mexico The current work on this extension is signed State Route 15. State Route 15 in the US state of California is the seamless 5 There is a continuous freeway between I-8 and I-5, but various intersections and acceleration/deceleration lanes are not up to interstate standards. The northern terminus is in Sweetgrass, Montana at the international border between the United States and Canada, where it becomes Alberta Highway 4. The United States of America —commonly referred to as the Country to "Dominion of Canada" or "Canadian Federation" or anything else please read the Talk Page Highway 4 forms the most southern leg of the CANAMEX Corridor highway system in Alberta.

California

Main article: Interstate 15 in California

North of its junction with the Riverside Freeway, State Route 91, in the Inland Empire near Corona, the route roughly follows the former routes of U.S. Highway 91 and U.S. Highway 395. In the US state of California, Interstate 15 is a major north-south route through the San Bernardino, Riverside, and San Diego The Inland Empire is a region mainly located in the Riverside and San Bernardino counties of Southern California and generally encompasses the Corona is a city in Riverside County, California, United States. US Route 91 is a north-south United States highway. The highway currently serves as a connection between the Cache Valley area of Utah and Idaho to the US Route 395 is a US Route in the western United States. The southern terminus of the route is in the Mojave Desert at Interstate 15 near North of Devore, the highway follows the approximate alignment of historic U.S. Highway 66 along with U. US Route 66 (also known as the Will Rogers Highway after the humorist, and colloquially known as the "Main Street of America" or the "Mother S. 91 and 395. U. S. 395 breaks away at Hesperia and the route continues the approximate route of co-signed 66 and 91 until about the Mojave River, 35 miles (56 km) to the north. At that point, I-15 follows the old route of U. S. 91 exclusively. For many parts of the highway, high-voltage power lines, like Path 46 and Path 27, almost all from Hoover Dam, follow the freeway, many of them link distant power stations to the Los Angeles metro area. Electric power transmission, a process in the delivery of Electricity to consumers is the bulk transfer of electrical power Path 46, also called West of Colorado River, Arizona-California West-of-the-River Path ( WOR) is a set of many High voltage electrical power Intermountain (also called Path 27) is the designation of a bipolar HVDC transmission line between the Intermountain power plant in Utah and Hoover Dam, also sometimes known as Boulder Dam, is a Concrete Arch-gravity dam in the Black Canyon of the Colorado River, on the Los Angeles (lɑˈsændʒələs los ˈaŋxeles in Spanish) is the largest City in the state of California and the American West

The starting point of Interstate 15 was originally planned to be in San Bernardino at an interchange with the San Bernardino Freeway, I-10. Interstate 10 ( I-10) is the southernmost east-west coast-to-coast Interstate highway in the United States. This was logical as I-15 was following the old alignment of the historic Route 66 which passed through San Bernardino. The segment was completed accordingly. However, legislation was later passed to extend the interstate to San Diego. But instead of extending the existing freeway from the I-10 interchange south, the California Department of Transportation made a new segment in Devore that 'branched' off of the original alignment and bypassed San Bernardino altogether. The California Department of Transportation ( Caltrans) is a Government department in the U This segment's alignment is generally northeast to southwest for about 15 miles (24 km). Then, in Fontana/Rancho Cucamonga, its directional alignment shifts to north-south where it eventually junctions with Interstate 10 (about 15 miles or 24 kilometers west of the original interchange in San Bernardino). Fontana ( is a city in San Bernardino County, California, United States. Rancho Cucamonga is a city in San Bernardino County, California, United States. The segment that had been built from Devore to San Bernardino was retained as an interstate, but was re-numbered as Interstate 215. Interstate 215 (I-215 in California is a long north-south Interstate Highway in the " Inland Empire " region of Southern California Note that during the construction of I-15's present alignment, and for some time afterwards, I-215 was numbered as I-15E, and its actual mileage would begin at Interstate 10.

Nevada

Main article: Interstate 15 in Nevada

Northbound I-15 makes a steep descent from the Mountain Pass, in California into the Ivanpah Valley and the sight of Ivanpah Dry Lake. Route description Motorists in California leave the mountainous Mohave Desert and begin a long descent through Ivanpah Valley and Ivanpah Dry The Ivanpah Valley is in southeastern California and southern Nevada in the United States. Ivanpah Dry Lake is located near Primm Nevada, near the border of California and Nevada in the Ivanpah Valley next to Interstate 15 In the middle distance, the casinos of Primm straddle the freeway right at the Nevada border, while those of Jean are further off, to the left; Las Vegas is immediately on the far side of the hills on the horizon. Primm (often called Primm Valley, after one of its casinos is a tiny community in Clark County, Nevada, United States, primarily notable for Jean is a small community in Clark County Nevada, located approximately 12 miles north of the Nevada - California state line along Interstate 15 Las Vegas ( Spanish: "The Meadows" is the most populous City in the state of Nevada, the seat of Clark County, and an internationally

Interstate 15 begins in Primm, continues through Las Vegas along the Las Vegas Strip corridor. Primm (often called Primm Valley, after one of its casinos is a tiny community in Clark County, Nevada, United States, primarily notable for Las Vegas ( Spanish: "The Meadows" is the most populous City in the state of Nevada, the seat of Clark County, and an internationally The Las Vegas Strip (also known as The Strip) is an approximately 4 mile (6 Then the interstate crosses the border with Arizona in Mesquite. The State of Arizona ( is a state located in the southwestern region of the United States. Mesquite is a city in Clark County, Nevada, United States, adjacent to the Arizona state line and 80 miles (124 km northeast of Las The whole interstate in Nevada runs entirely in Clark County, for a distance of 123. Nevada ( is a state located in the western region of the United States of America. Clark County is a County located in the US state of Nevada. The county had a population of 1375765 at the 2000 census, and a 2006 estimated 77 miles (199. 19 km).

Arizona

Main article: Interstate 15 in Arizona

I-15 just clips the northwestern corner of Arizona with a total length of 29. Interstate 15 (I-15 a transcontinental Interstate Highway from San Diego California to the Canadian border, passes through Mohave County in The Arizona Strip is the part of the US state of Arizona lying north of the Colorado River. The State of Arizona ( is a state located in the southwestern region of the United States. 4 miles (47 km). ^[10] The stretch is separated from the rest of the state and has one major exit, at Beaver Dam/Littlefield, Arizona. Littlefield is an unincorporated community in Mohave County located in the extreme northwestern corner of the U It includes a spectacular section where the road twists between the narrow walls of the Virgin River Gorge. The Virgin River Gorge located between St George Utah N37° 6' W113° 35' and Littlefield Arizona N36° 51' W114° 1' is a long canyon that has been carved

I-15 passes through the Virgin River Gorge, Arizona revealing scenic reddish brown cliffs. The Virgin River is a nearly 160 mile (322 km long tributary of the Colorado River in the southwestern United States.

Utah

Main article: Interstate 15 in Utah

I-15 continues through Utah for just over 400 miles (640 km). In the US state of Utah, Interstate 15 runs north-south through the southwestern and central portions of the state passing through many of the population centers The State of Utah (ˈjuːtɔː or) is a western state of the United States. It is the main north-south connection for the state. The highway approximately follows the old alignment of U.S. Highway 91 from St. George to Brigham City. US Route 91 is a north-south United States highway. The highway currently serves as a connection between the Cache Valley area of Utah and Idaho to the St George is a city located in the southwestern part of the U Brigham City redirects here for the film by Richard Dutcher of the same name please see Brigham City (film The highway passes through the fast-growing Dixie region, which includes St. George, Cedar City, and eventually most of the major cities and suburbs along the Wasatch Front, including Provo, Orem, Sandy, West Jordan, Salt Lake City, Layton, and Ogden. Dixie is the nickname for southwestern Utah. It was first settled in the early 1860s when farmers were sent south by Brigham Young to grow cotton hoping St George is a city located in the southwestern part of the U Cedar City is a city in Iron County, Utah, United States, 250 miles south of Salt Lake City on Interstate 15. The Wasatch Front is an Urban area in the north-central part of the U Provo is a city in and the County seat Orem is a city in the north-central part of the US state of Utah in Utah County. Sandy (also known as Sandy City) is a city in Salt Lake County, Utah, United States, and a suburb of Salt Lake City. West Jordan is a city in Salt Lake County, Utah, United States. Salt Lake City is the Capital and the most populous city of the U Layton is a city in Davis County, Utah, United States. It is part of the Ogden &ndash Clearfield, Utah Metropolitan Statistical Ogden is a city in and the County seat of Weber County, Utah, United States. NearCove Fort, Interstate 70 begins its journey eastward across the country. Cove Fort is a Fort and historical site located in Millard County Utah. Interstate 70 (I-70 is an Interstate highway in the United States that runs from Interstate 15 near Cove Fort Utah, to a Park and Ride The interstate merges with I-80 for about 3 miles (5 km) from South Salt Lake to just west of Downtown Salt Lake City and also merges with Interstate 84 from Ogden to Tremonton. A concurrency, overlap, or coincidence in a road network is an instance of one physical road bearing two or more different Highway, Motorway Interstate 80 (I-80 is the second-longest Interstate Highway in the United States (after I-90) South Salt Lake is a city in Salt Lake County, Utah, United States. Downtown Salt Lake City is the oldest district In the US state of Utah, Interstate 84 heads southeast from the Idaho state line overlapping Interstate 15 between Tremonton and Ogden is a city in and the County seat of Weber County, Utah, United States. Tremonton is a city in Box Elder County, Utah, United States. Along nearly its entire length through the state, I-15 winds its way along the western edge of a nearly continuous range of mountains (the Wasatch Range in the northern half of the state). The Wasatch Range is a Mountain range that stretches about from the Utah- Idaho border south through central Utah in the western United States The only exceptions are when it passes through the mountains south of Cedar City and again north of Cove Fort. Cedar City is a city in Iron County, Utah, United States, 250 miles south of Salt Lake City on Interstate 15. Cove Fort is a Fort and historical site located in Millard County Utah.

Extinct volcano cone near Fillmore, Utah off I-15.

Plaque located on Interstate 15 between Helena and Great Falls.

Idaho

Main article: Interstate 15 in Idaho

I-15 passes through Idaho for nearly 200 miles (320 km). Interstate 15 in Idaho is known for beautiful landscapes along the freeway in the state The State of Idaho ( is a state in the Pacific Northwest region of the United States of America. The highway runs through Pocatello, Blackfoot, and Idaho Falls. Pocatello (ˌpoʊkəˈtɛloʊ is the County seat and largest city of Bannock County, with a small portion on the Fort Hall Indian Reservation in neighboring Blackfoot is a city in Bingham County, Idaho, United States. The population was 10419 at the 2000 census. Idaho Falls is the County seat and largest city of Bonneville County, Idaho, United States.

Montana

Main article: Interstate 15 in Montana

Interstate 15 continues onward through nearly 400 miles (640 km) of Montana through the cities of Butte, Helena and Great Falls, intersecting with Interstate 90, Interstate 115 and Interstate 315. Interstate 15 in Montana continues onward from Idaho through nearly 400 miles (640 km of Montana through the cities of Butte, Helena Montana ( is a state in the Western United States. One-third of the state in the western part contains numerous mountain ranges (approximately 77 named of the northern Butte (IPA) is a city in and the County seat of Silver Bow County, Montana, United States. Helena (ˈhɛlɨnə is the Capital city of the US state of Montana and the County seat of Lewis and Clark County Great Falls is a city in and the County seat of Cascade County, Montana, United States. Interstate 90 (I-90 is the longest interstate highway in the United States at nearly 3100 miles (5000 kilometers Interstate 115 is a 119 mile interstate in Butte Montana that connects Interstate 15 and Interstate 90 to Business 15/90 in downtown Butte Interstate 15 Business is a Business loop of Interstate 15 in Great Falls Montana. At Sweetgrass, I-15 terminates upon crossing the international border into Alberta, Canada; however, I-15 signage is present on Alberta Highway 4 southbound from Lethbridge to the U. Alberta (ælˈbɝtə is one of Canada's prairie provinces. It became a province on September 1 1905 Country to "Dominion of Canada" or "Canadian Federation" or anything else please read the Talk Page Highway 4 forms the most southern leg of the CANAMEX Corridor highway system in Alberta. Lethbridge (ˈlɛθbrɨdʒ is a city in the province of Alberta, Canada and the largest city in Southern Alberta. S. -Canada Border. Country to "Dominion of Canada" or "Canadian Federation" or anything else please read the Talk Page

History

Interstate 15 was constructed along the route of U.S. Route 91. US Route 91 is a north-south United States highway. The highway currently serves as a connection between the Cache Valley area of Utah and Idaho to the Once Interstate 15 was relatively intact U. S. 91 was decommissioned, except for one part in Northern Utah/Southern Idaho where Interstate 15 instead followed the route of former U.S. Route 191. US Route 191 is a spur of US Route 91 that has two branches The northern branch currently runs for 440 miles (708 km from Loring Montana, at the Canadian

Interstate 15 had an eastern branch bypassing San Bernardino, California, and a western branch in Idaho. The State of Idaho ( is a state in the Pacific Northwest region of the United States of America. I-215 around San Bernardino was I-15E^[11], and the western I-86 was once called I-15W. ^[12]

Future

Redesignation of SR 15 in San Diego as I-15 will eventually occur when the freeway's interchange with SR 94 is updated to Interstate standards. In the field of Road transport, an interchange is a road junction that typically State Route 94 in the US state of California is the Martin Luther King Jr I-blank widesvg|90px|right]] Standards for Interstate Highways in the United States are defined by the American Association of State Highway and Transportation Officials The interchange currently has left-exits and blind merges, and is due to be updated with a long-awaited widening of SR 94 in 2008. 2008 ( MMVIII) is the current year in accordance with the Gregorian calendar, a Leap year that started on Tuesday of the Common At that time SR 15 will be resigned as part of I-15.