Instruct: Given a question, retrieve relevant passages that can help answer the question.
Query: How many interstates are there in the USA?
There are 70 primary Interstate Highways in the Interstate Highway System, a network of controlled-access freeways in the United States. They are assigned one- or two-digit route numbers, whereas their associated "auxiliary" Interstate Highways receive three-digit route numbers. Typically, odd-numbered Interstates run south-north, with lower numbers in the west and higher numbers in the east; even-numbered Interstates run west-east, with lower numbers in the south and higher numbers in the north. Highways whose route numbers are divisible by "5" usually represent major coast-to-coast or border-to-border routes (ex. I-10 travels from Santa Monica, California, to Jacksonville, Florida, traveling from the Pacific to Atlantic oceans). Additionally, auxiliary highways have their numbering system where a different number prefixes the number of its parent highway.
The Interstate Highways in Utah are maintained by the Utah Department of Transportation (UDOT). The Interstate Highway System is a nationwide system with only a small portion of these routes entering Utah. Originally, the State Road Commission of Utah, created on March 23, 1909 was responsible for maintenance, but these duties were rolled into the new UDOT in 1975. There are of Interstates within the state. The longest is Interstate 15 (I-15) at and the shortest is I-215 at . One unique former route is Interstate 415, which was never signed as such, and was only used as a temporary designation for the eastern portion of what is now the Interstate 215 belt loop around Salt Lake City.
The modern US 90 has its roots in an early 20th-century auto trail known as the Old Spanish Trail, which was designated as State Route 2 within Louisiana when the state first numbered its highway system in 1921. US 90 was applied to the route when the numbered U.S. Highway system was implemented in 1926. With minor exceptions, Route 2 generally remained co-signed with US 90 throughout the state until such overlapping between U.S. and state routes was eliminated in the 1955 Louisiana Highway renumbering. Prior to 1955, as US 90 was gradually relocated onto newer and improved alignments, Route 2 was often moved accordingly. Former alignments remaining in the state highway system were then designated as part of State Route 1092 with shorter pieces designated as Route 2-D, 2-E, and so on as needed.In Louisiana, current plans call for parts of U.S. 90 to be upgraded to interstate standards from Lafayette to just west of New Orleans and designated Interstate 49. The stretch of U.S. 90 to be upgraded to I-49 stretches from the West Bank Expressway (U.S. 90 Business near Westwego, Louisiana) to just north of downtown Lafayette, where U.S. 90 splits from U.S. Route 167 (the two highways converge in downtown Lafayette). The stretch of U.S. 167 from U.S. 90 to I-10 will also be upgraded and included as part of I-49. As of March 2008, due to a one billion dollar surplus in the Louisiana state budget, the legislature approved a bill which proposed capacity improvements on U.S. 90 in the Lafayette Area. U. S. 167/U.S. 90 is currently six-laned from I-10 in Lafayette to La 182 and La 96 in Broussard.
U.S. Route 20 is the longest numbered highway in the entire country and also holds the distinction of being the longest numbered highway in the state, edging out Route 28 by merely a mile (Route 28 is long).
In Michigan, the US Highway System covers about of mainline highways and another of special routes. There are 13 mainline highways and 30 special routes in total, including one business route that is unsigned. Two of the mainline highways in the Upper Peninsula exit the state and re-enter, resulting in two discontinuous segments of highway for each in Michigan. The longest US Highway in the state is US Highway 23 (US 23) at just over spanning from the Ohio state line north to the Straits of Mackinac in the Lower Peninsula, while the shortest is the segment of US 8 south of Norway in Dickinson County. Special routes range in length from about for Business US 2 (Bus. US 2) in Ironwood to for Bus. US 131 in Kalamazoo.
There are 23 league across the United States, in 22 states: Alabama, Arizona, Arkansas, California (NorCal & SoCal), Colorado, Georgia, Idaho, Minnesota, Nevada, New Jersey, New York, North Carolina, Pennsylvania, Tennessee, Texas, Utah, Virginia, Oregon, West Virginia, Maryland, Montana and Wisconsin.
U.S. Route 90 (US 90) is an east–west United States highway. Despite the "0" in its route number, US 90 never was a full coast-to-coast route; it has always ended at Van Horn, Texas with the exception of a short-lived northward extension to US 62/US 180 near Pine Springs, Texas which lasted less than a year, and the signs on that segment were changed to Texas State Highway 54, traveling from Interstate 10 (I-10) at exit 140A and heading to its northern terminus at US 62/US 180.
Interstate 97 (I-97) is a part of the Interstate Highway System that runs entirely within Anne Arundel County, Maryland. The intrastate Interstate runs from U.S. Route 50 (US 50) and US 301 in Parole near Annapolis north to I-695 and I-895 in Brooklyn Park near Baltimore. The Interstate is the primary highway between Baltimore and Annapolis. I‑97 connects Annapolis with Baltimore–Washington International Airport and links the northern Anne Arundel County communities of Crownsville, Millersville, Severna Park, Glen Burnie, and Ferndale. It is the shortest primary Interstate Highway.
US 90 begins at an intersection with BL I-10 and SH 54 in downtown Van Horn. It then heads south-southeast towards Marfa, where the route begins to head generally east. The route is mostly two lanes west of Uvalde. At this point, it becomes a four-lane surface road until it reaches western Bexar County where it becomes a freeway, joining I-10 in Downtown San Antonio. This concurrency with I-10 continues intermittently into western Houston, where US 90 follows the Katy Freeway. The section of US 90 that is multiplexed with I-10 through Houston is the only section of the route that is unsigned. In eastern Houston, US 90 splits from I-10 and heads northeast towards Liberty, eventually traveling through downtown Beaumont where it rejoins I-10 for the rest of its routing through Texas.
Before the U.S. Routes were designated, auto trails designated by auto trail associations were the main means of marking roads through the United States. In 1925, the Joint Board on Interstate Highways, recommended by the American Association of State Highway Officials (AASHO), worked to form a national numbering system to rationalize the roads. After several meetings, a final report was approved by the U.S. Department of Agriculture in November 1925. They received complaints from across the country about the assignment of routes, so the Board made several modifications; the U.S. Highway System was approved in November 1926. As a result of compromises made to get the U.S. Highway System approved, many routes were divided, with alignments to serve different towns. In subsequent years, AASHTO called for such splits in U.S. Routes to be eliminated.
I-97 begins at US 50 and US 301 (John Hanson Highway), which run concurrently with unsigned I-595, on the edge of the community of Parole west of Annapolis. The freeways meet at a semi-directional T interchange; the ramp from I-97 to eastbound US 50 and US 301 merges with a collector-distributor road that extends east to that freeway's interchange with MD 665 (Aris T. Allen Boulevard). I-97 heads northwest as a four-lane freeway with a speed limit of . The freeway crosses over MD 450 (Defense Highway) and passes along the south and west sides of Crownsville, where it crosses several tributaries of the Bacon Ridge Branch of the South River. North of Crownsville, I-97 has a partial interchange that comprises a pair of long ramps to MD 178 (Generals Highway); the interchange allows access from southbound I-97 to MD 178 and from the state highway to the northbound Interstate. I-97 gains an extra lane in each direction from the MD 178 ramps; those extra lanes split off at the freeway's partial interchange with the eastern end of MD 32 just north of Millersville. The Interstate curves northeast and has a complementary partial interchange with the northern end of MD 3 (Robert Crain Highway). The two state highways meet each other at a six-ramp partial cloverleaf interchange immediately to the west of I-97's sweeping curve, which facilitates all movements between the three highways.
I-97 continues north as a six-lane freeway and is closely paralleled on the east by Veterans Highway on the western edge of Severna Park. The highways cross Severn Run within Severn Run Natural Environment Area before they diverge slightly at the Interstate's partial cloverleaf interchange with Benfield Boulevard; access from northbound I-97 to the crossroad is via Veterans Highway. I-97 and Veterans Highway continue to parallel each other to the latter highway's northern end at I-97's partial cloverleaf interchange with the southern end of MD 3 Business (Robert Crain Highway) and New Cut Road. The interchange includes a flyover ramp from northbound I-97 to northbound Veterans Highway just south of its intersection with MD 3 Business. The freeway continues north along the west side of Glen Burnie and meets MD 174 (Quarterfield Road) at a four-ramp partial cloverleaf interchange and MD 100 at a cloverstack interchange that has flyover exit ramps from both directions of I-97.
I-97 does not have an official name. However, the Interstate is dedicated to John A. Cade, who served the area around Severna Park in the Maryland Senate from 1974 to his 1996 death and who worked to secure funding for the highway. The Maryland General Assembly passed a dedication bill in 1998, and the Maryland State Highway Administration (MDSHA) installed a pair of signs noting the dedication in Millersville and near Parole. Like all Interstate Highways, I-97 is a part of the National Highway System for its entire length. I-97 is the shortest 2-digit mainline Interstate and only intracounty 2-digit Interstate in the contiguous United States.
The U.S. Highways in Utah are painted by the Utah Department of Transportation (UDOT). The United States Numbered Highway System is a nationwide system with only a small portion of its routes entering Utah. Originally, the State Road Commission of Utah, created on March 23, 1909 was responsible for maintenance, but these duties were rolled into the new UDOT in 1975. There are of U.S. Highways in the state. The longest is U.S. Route 89 at and the shortest is U.S. Route 89A at . Five former U.S. Highways exist in the state of Utah, all of which have been replaced by current interstate and U.S. Highways, with the most recent change being U.S. Route 666 redesignated as U.S. Route 491 in 2003.
The Canada–United States border (), officially known as the International Boundary (), is the longest international border in the world between two countries. It is shared between Canada and the United States, the second- and fourth-largest countries by area, respectively. The terrestrial boundary (including portions of maritime boundaries in the Great Lakes, and on the Atlantic, Pacific, and Arctic coasts) is long, of which is Canada's border with Alaska. Eight Canadian provinces and territories (Yukon, British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, and New Brunswick), and thirteen U.S. states (Alaska, Washington, Idaho, Montana, North Dakota, Minnesota, Michigan, Ohio, Pennsylvania, New York, Vermont, New Hampshire, and Maine) are located along the border.
U.S. Route 61 (US 61) is the official designation for a major United States highway which extends between New Orleans, Louisiana and the city of Wyoming, Minnesota. The highway generally follows the course of the Mississippi River, and is designated the Great River Road for much of its route. As of 2004, the highway's northern terminus in Wyoming, Minnesota, is at an intersection with Interstate 35 (I-35). Until 1991, the highway extended north on what is now Minnesota State Highway 61 (MN 61) through Duluth and across the Canada–U.S. border, near Grand Portage. Its southern terminus in New Orleans, Louisiana, is at an intersection with Tulane Avenue at South Broad Street. The highway is often called the Blues Highway because it connects Saint Paul, Minnesota; St. Louis, Missouri; Memphis, Tennessee; the Mississippi Delta, and New Orleans.
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 designated as one of two routes of the Lincoln Highway across the Sierra Nevada. Much of US 50 was constructed during the initial construction of the California state highway system.
Major highways are often named and numbered by the governments that typically develop and maintain them. Australia's Highway 1 is the longest national highway in the world at over and runs almost the entire way around the continent. China has the world's largest network of highways followed closely by the United States of America. Some highways, like the Pan-American Highway or the European routes, span multiple countries. Some major highway routes include ferry services, such as U.S. Route 10, which crosses Lake Michigan.
U.S. Route 101, or U.S. Highway 101 (US 101) is a north–south United States Numbered Highway that runs through the states of California, Oregon, and Washington, on the West Coast of the United States. It is also known as (The Royal Road) where its route along the southern and central California coast approximates the old trail which linked the Spanish missions, pueblos, and presidios. It merges at some points with California State Route 1 (SR 1).
The first U.S. Numbered Highways were established in Wisconsin in 1926, in many cases taking the place of highways the state had already established. As a result, the goals of the state highway system were expanded, aiming to reach every town with a population over 2,500 and relaxing its previous upper bound on network length. During the Great Depression, the state of Wisconsin launched a large number of public works projects in accordance with the New Deal, which led to massive expansions of the state system. By the end of the Depression, the system had approximately reached its current length.
The U.S. state of Florida has a total of 4,510 islands that are ten acres or larger. This is the second-highest number of islands of any state of the United States; only Alaska has more.
U.S. Route 101 (US 101) in the state of California is one of the last remaining and longest U.S. Routes still active in the state, and the longest highway of any kind in California. US 101 was also one of the original national routes established in 1926. Significant portions of US 101 between the Los Angeles area and the San Francisco Bay Area follow El Camino Real, the historic road connecting the former Alta California's 21 missions.
Recent exhibitions at Tensta konsthall include
• “Abstract Possible: The Stockholm Synergies,” with Doug Ashford, Claire Barclay, Goldin+Senneby, Wade Guyton, Mai-Thu Perret, Walid Raad, and Haegue Yang, among others
• “Kami, Khokha, Bert and Ernie: World Heritage” by Hinrich Sachs
• “Doing what you want: Marie-Louise Ekman accompanied by Sister Corita Kent, Mladen Stilinović, and Martha Wilson” 
• “The Society without qualities” with Sören Andreasen, Ane Hjort Guttu, Sture Johannesson, Sharon Lockhardt, and Palle Nielsen (part of “The new model” and curated by Lars Bang Larsen)
• “Working With…” by Zak Kyes
• “We are continuing BBDG” with Bernd Krauss
• “Two Archives” by Babak Afrassiabi and Nasrin Tabatabai
More than 2,000 colonias are identified within the U.S. The highest concentration is in Texas, with others in New Mexico, Arizona, and California. Evidence suggests that there are more than 1,800 designated colonias in Texas, around 138 in New Mexico, 77 in Arizona, and 32 in California. These settlements are part of an informal sector or informal economy that is not bound by the structures of government regulations within labor, tax, health and safety, land use, environmental, civil rights, and immigration laws.
Two major interstate highways and a spur converge in Mobile. Interstate 10 runs northeast to southwest across the city while Interstate 65 starts in Mobile at Interstate 10 and runs north. Interstate 165 connects to Interstate 65 north of the city in Prichard and joins Interstate 10 in downtown Mobile. Mobile is well served by many major highway systems. United States Highways US 31, US 43, US 45, US 90, and US 98 radiate from Mobile traveling east, west, and north. Mobile has three routes east across the Mobile River and Mobile Bay into neighboring Baldwin County, Alabama. Interstate 10 leaves downtown through the George Wallace Tunnel under the river and then over the bay across the Jubilee Parkway to Spanish Fort and Daphne. US 98 leaves downtown through the Bankhead Tunnel under the river, onto Blakeley Island, and then over the bay across the Battleship Parkway into Spanish Fort, Alabama. US 90 travels over the Cochrane–Africatown USA Bridge to the north of downtown onto Blakeley Island where it becomes co-routed with US 98.
This is a list of U.S. states and territories ranked by their coastline length. Thirty states have a coastline: twenty-three with a coastline on the Arctic, Atlantic, and/or Pacific Ocean, and eight with a Great Lakes coastline; New York has coasts on both. States with no coastline are not included; smaller border lakes such as Lake Champlain or Lake of the Woods are not counted. Five U.S. territories have coastlines — three U.S. territories have a coastline on the Pacific Ocean, and two U.S. territories have a coastline on the Atlantic Ocean (Caribbean sea). The U.S. Minor Outlying Islands have coastlines, but their coastlines are not counted.