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Encyclopedia > Interstate highway
Interstate Highways in the lower 48 states.
Interstate Highways in the lower 48 states.
A typical rural stretch of Interstate Highway, with two lanes in each direction separated by a large grassy median, and with cross-traffic limited to overpasses and underpasses.
A typical rural stretch of Interstate Highway, with two lanes in each direction separated by a large grassy median, and with cross-traffic limited to overpasses and underpasses.

The Dwight D. Eisenhower National System of Interstate and Defense Highways, commonly called the Interstate Highway System, is a network of highways in the United States. The Interstate Highway System is a separate system within the larger National Highway System. With very few exceptions, Interstate highways are controlled-access freeways, allowing for safe high-speed driving when traffic permits. They are assigned a special level of funding at the federal level. Despite this federal funding, these highways are owned, designed, built and maintained by the state in which they are located, with the only exception being the federally-owned Woodrow Wilson Bridge on the Capital Beltway (I-95/I-495). Image File history File links Download high resolution version (4096x2532, 1188 KB) A map of the Interstate Highways in the contiguous United States (not including Hawaii). ... Image File history File links Download high resolution version (4096x2532, 1188 KB) A map of the Interstate Highways in the contiguous United States (not including Hawaii). ... A typical stretch of Interstate 5 in the Central Valley of California. ... A typical stretch of Interstate 5 in the Central Valley of California. ... On an expressway, motorway, or autobahn, the median (North American English) or central reservation (British English) is the strip of grass or the wall which separates opposing lanes of traffic. ... Mitchell Freeway in Perth, Western Australia For other uses, see Highway (disambiguation). ... The National Highway System includes many significant roads besides Interstate Highways Note: This article was adapted from public domain Federal Highway Administration web sites. ... For the most part, the United States Interstate Highway System is a connected system, with most roads completed. ... High-capacity freeway interchange in Los Angeles, California. ... Driving is the controlled operation of a vehicle, which is usually a motor vehicle such as a truck, bus, motorcycle, or car. ... Woodrow Wilson Memorial Bridge, on the Potomac River at Alexandria, Virginia, completed in 1961 The Woodrow Wilson Memorial Bridge is a drawbridge over the Potomac River connecting the independent city of Alexandria, Virginia and Prince Georges County, Maryland. ... The Capital Beltway (in green) The Capital Beltway (Interstate 495) is an expressway-class interstate highway which circles the Washington, DC area. ... Interstate 95 or (I-95) is an interstate highway that runs 1907 miles (3070 kilometers) north and south along the eastern United States coast. ... The Capital Beltway (in green) The Capital Beltway (Interstate 495) is a freeway-class interstate highway which circles the Washington, DC area. ...


The highways in the system are typically known as Interstate XX or I-XX; sometimes Interstate Highway XX (IH XX) or Interstate Route XX (IR XX) is used. In some areas the more generic Route XX or Highway XX is used. The system serves all major U.S. cities, and unlike its counterparts in most industrialized countries, often goes right through downtown areas rather than bypassing them. This facilitated the emergence of automobile-oriented postwar suburban development patterns, often pejoratively referred to as "urban sprawl". Downtown Honolulu in Hawaii, United States, an example of an urban downtown district Central business district (CBD) and downtown are terms referring to a commercial heart of a city. ... Urban sprawl is a term for the expansive, rapid, and sometimes reckless, growth of a greater metropolitan area, traditionally suburbs (or exurbs) over a large area. ...


The system is prominent in the daily lives of most Americans. Virtually all goods and services are delivered via the Interstate Highways at some point. Many residents of American cities use the urban segments of the system to go to and from their jobs. Most long-distance journeys (for vacation or business) of less than 300 miles (500 km) use the interstate highway system at some point.


Hawaii has several signed Interstates, but Alaska and Puerto Rico do not. The latter two do have roads designated as Interstates for funding purposes, but they are not currently or planned to be built to Interstate standards. The public controlled-access highways of Puerto Rico are the Autopistas (PR-22, PR-52, and PR-53). State nickname: The Aloha State Other U.S. States Capital Honolulu Largest city Honolulu Monarch Akahi Nui Governor Linda Lingle (R) Senators Daniel Inouye (D) Daniel Akaka (D) Official language(s) Hawaiian and English Area 28,337 km² (43rd)  - Land 16,649 km²  - Water 11,672 km² (41. ... State nickname: The Last Frontier, The Land of the Midnight Sun Other U.S. States Capital Juneau Largest city Anchorage Governor Frank Murkowski (R) Senators Ted Stevens (R) Lisa Murkowski (R) Official language(s) English Area 663,267 mi² / 1,717,854 km² (1st)  - Land 571,951 mi² / 1,481... The American Association of State Highway and Transportation Officials (AASHTO) defines standards for Interstate Highways in their publication A Policy on Design Standards - Interstate System. ... The Autopistas de Puerto Rico are highways in Puerto Rico designed to replace Puerto Ricos older Interstate highways (PR-1, PR-2, and PR-3). ...

Contents


History

Commemorative sign introduced in 1993.
Commemorative sign introduced in 1993.

The interstate system was authorized by the Federal-Aid Highway Act of 1956, popularly known as the National Interstate and Defense Highways Act of 1956. It was lobbied for by major U.S. automobile manufacturers and championed by President Dwight D. Eisenhower, and was influenced by both his experiences as a young soldier crossing the country in 1919 following the route of the Lincoln Highway, and by his appreciation of the German autobahn network. Download high resolution version (3002x3002, 284 KB) Wikipedia does not have an article with this exact name. ... Download high resolution version (3002x3002, 284 KB) Wikipedia does not have an article with this exact name. ... The Federal-Aid Highway Act of 1956, popularly known as the National Interstate and Defense Highways Act, officially began on June 29, 1956, when a hospitalized Dwight D. Eisenhower signed this bill into law. ... A small variety of cars, the most popular kind of automobile. ... The President of the United States (unofficially abbreviated POTUS) is the head of state of the United States. ... Dwight David Ike Eisenhower (October 14, 1890 – March 28, 1969) was an American soldier and politician. ... 1919 (MCMXIX) was a common year starting on Wednesday (see link for calendar). ... The Lincoln Highway was Americas first transcontinental highway. ... The German and Austria autobahn sign The Swiss autobahn sign Autobahn (pronounced in IPA) is the German word for a major high-speed road confined to motor vehicles and having full control of access, similar to a motorway or freeway in English-speaking countries. ...


Planning for a system of new superhighways began in the late 1930s, even before federal commitment to build the Interstate highway system came in the 1950s. Construction on the world's first public limited-access highway, the Bronx River Parkway, had begun in New York as early as 1907. By the 1920s, longer highways such as the New York City parkway system had been built as part of local or state highway systems. As automotive traffic increased, planners saw a need for such an interconnected national system to supplement the existing, largely non-freeway, U.S. Highway system.The General location of national system of interstate highways, including all additional routes at urban areas designated in September, 1955 maps what became the interstate system, and is informally known as the Yellow Book. // Events and trends The 1930s were described as an abrupt shift to more radical lifestyles, as countries were struggling to find a solution to the global depression. ... // Events and trends The 1950s in Western society was marked with a sharp rise in the economy for the first time in almost 30 years and return to the 1920s-type consumer society built on credit and boom-times, as well as the the baby boom from returning GIs who... The Bronx River Parkway was one of the earliest limited access automobile highways. ... State nickname: The Empire State Official languages None. ... 1907 (MCMVII) was a common year starting on Tuesday (see link for calendar). ... New York City, officially named the City of New York, is the most populous city in the United States, and the most densely populated major city in North America. ... A parkway is a general designation of a type of limited-access highway in the US and Canada. ... High-capacity freeway interchange in Los Angeles, California. ... Current U.S. Highway shield Current U.S. Highway shield in California The United States Highway System is an integrated system of roads in the United States numbered within a nationwide grid. ... The General location of national system of interstate highways, including all additional routes at urban areas designated in September, 1955 or the Yellow Book maps where the United States Interstate highway system was to go. ...


Although construction on the Interstate Highway system continues, it was officially regarded as complete in 1991 (though 1.5 miles of the original planned system remain unconstructed as of 2005 [1]). The initial cost estimate for the system was $25 billion over twelve years; it ended up costing $114 billion, taking 35 years to complete. As of 2004, the system contains over 42,700 miles (68,500 km) of roads, all at least four lanes wide. 1991 (MCMXCI) is a common year starting on Tuesday of the Gregorian calendar. ... 2005 is a common year starting on Saturday of the Gregorian calendar. ...


Standards

Main article: Interstate Highway standards

The American Association of State Highway and Transportation Officials (AASHTO) has defined a set of standards that all new Interstates must meet unless a waiver from the Federal Highway Administration (FHWA) is obtained. These standards have become stricter over the years. One almost absolute standard is the controlled access nature of the roads. Except for a few exceptions, traffic lights (and cross traffic in general) are limited to toll booths and ramp meters (metered flow control for lane merging during rush hours). The American Association of State Highway and Transportation Officials (AASHTO) defines standards for Interstate Highways in their publication A Policy on Design Standards - Interstate System. ... AASHTO, the American Association of State Highway and Transportation Officials, is a standards setting body which publishes specifications, test protocols and guidelines which are used in highway design and construction throughout the United States. ... The Federal Highway Administration (FHWA) is a division of the U.S. Department of Transportation that specializes in automobile transportation. ... A typical rural freeway (Interstate 5 in the Central Valley of California). ... For the most part, the United States Interstate Highway System is a connected system, with most roads completed. ... Traffic lights can have several additional lights for filter turns or bus lanes. ... A toll road, turnpike or tollpike is a road on which a toll authority collects a fee for use. ... A ramp meter or metering light is a device, usually a basic traffic light or a two-phase (red and green, no yellow) light, that regulates traffic entering freeways according to current traffic conditions. ... Rush hour in a city A rush hour is a part of the day with busy traffic and hence traffic congestion on the roads and crowded public transport; normally the two periods in a day when people are travelling to or from work or school. ...


Speed limits

It has been suggested that this article or section be merged into Speed limit. (Discuss)

Speed limits vary according to location. By initial planning, the Interstate system was designed to provide reasonable road safety at speeds of 75 to 80 miles per hour (120 to 130 km/h) except in limited stretches (such as steep mountain passes or urban cores) where many vehicles cannot maintain such speeds. Many western states had high speed limits. Kansas, for example, had a posted limit of 80 mph (130 km/h)[2]. Some states, such as Oregon, defined the limit as whatever was "reasonable and proper", which would not be allowed today (see Montana reference below). Wikipedia does not have an article with this exact name. ... A speed limit is the maximum speed allowed by law for vehicles on a road. ... A speed limit is the maximum speed allowed by law for vehicles on a road. ... The field of road safety is concerned with reducing the numbers or the consequences of vehicle crashes, by developing and implementing management systems ideally based in a multidisciplinary and holistic approach, with interrelated activities in a number of fields. ... In a range of hills, or especially of mountains, a pass (also gap, notch, col, saddle, bwlch or bealach) is a lower point that allows easier access through the range. ... State nickname: The Sunflower State Official languages None Capital Topeka Largest city Wichita Governor Kathleen Sebelius (D) Senators Sam Brownback (R) Pat Roberts (R) Area  - Total  - % water Ranked 15th 82,277 mi²; 213,096 km² 0. ... State nickname: Beaver State Other U.S. States Capital Salem Largest city Portland Governor Ted Kulongoski (D) Senators Ron Wyden (D) Gordon Smith (R) Official language(s) None Area 255,026 km² (9th)  - Land 248,849 km²  - Water 6,177 km² (2. ... State nickname: Treasure State Other U.S. States Capital Helena Largest city Billings Governor Brian Schweitzer (D) Senators Max Baucus (D) Conrad Burns (R) Official language(s) English Area 381,156 km² (4th)  - Land 377,295 km²  - Water 3,862 km² (1%) Population (2000)  - Population 902,195 (44th)  - Density 2. ...


In 1974, the federal government enacted 55 mph (90 km/h) as a gasoline conservation measure in response to the 1973 energy crisis. After the end of the embargo this restriction was continued as a safety measure. It was very unpopular, especially in western states. The 55 mph cap was relaxed in 1987 to allow 65 mph (105 km/h) speeds on rural Interstates if the states so chose. During this interim period, some roads (such as I-335 in Kansas) were specifically designated as Interstates to take advantage of this higher speed limit.[3] Shortly thereafter, 65 mph limits were allowed on roads not numbered as interstates but which were built to interstate standards. 1974 (MCMLXXIV) is a common year starting on Tuesday (click on link for calendar). ... A speed limit is the maximum speed allowed by law for vehicles on a road. ... Gasoline, as it is known in North America, or petrol (abbreviated from petroleum spirit), in many Commonwealth countries (sometimes also called motor spirit) is a petroleum-derived liquid mixture consisting primarily of hydrocarbons, used as fuel in internal combustion engines. ... Conservation can be confused with conversation and vice versa. ... At the height of the crisis in the United States, drivers of vehicles with odd numbered license plates were allowed to purchase gasoline only on odd-numbered days of the month, while drivers with even-numbers were limited to even-numbered days. ... This article deals with the western United States. ... 1987 (MCMLXXXVII) is a common year starting on Thursday of the Gregorian calendar. ... Interstate 335 is the name of an interstate highway spur route of Interstate 35 in the U.S. state of Kansas. ...


The 55/65 mph caps were eliminated in late 1995, fully returning speed limit control to the states. 1995 (MCMXCV) was a common year starting on Sunday of the Gregorian calendar. ...


Many states maintain several different limits. For example, in California, most interstates are limited to 55 mph within a major city, 65 mph (105 km/h) for most of the suburban highway stretches, and up to 70 mph (115 km/h) throughout the desert and rural stretches of the state. In some states, commercial trucks have a lower speed limit than passenger automobiles. In some mountainous regions, the condition of the roadway mandates a lower speed limit than would otherwise have applied. State nickname: The Golden State Official languages English Capital Sacramento Largest city Los Angeles Governor Arnold Schwarzenegger (R) Senators Dianne Feinstein (D) Barbara Boxer (D) Area  - Total  - % water Ranked 3rd 410,000 km² 4. ... It has been suggested that Suburbia be merged into this article or section. ... Rural area in Dalarna, Sweden Sheep eating grass in rural Australia Rural areas are sparsely settled places away from the influence of large cities and towns. ...


While some states have maintained the 65 mph limit, other states have increased the limits to 70 or 75 mph (110 or 120 km/h). Generally, the highest speed limits are found in the South and Southwest, while the lowest are found in the Northeast. Soon after the end of the National Maximum Speed Limit, the state of Montana ended daytime speed limits for automobile traffic on Interstate Highways in the state, instead instructing motorists to maintain a "reasonable and prudent" speed. A few years later, the "reasonable and prudent" law was declared unconstitutional for being too vague and a limit of 75 mph (120 km/h) was enacted in its place. The U.S. Southern states or the South, also known colloquially as Dixie, constitute a distinctive region covering a large portion of the United States, with its own unique heritage, historical perspective, customs, musical styles, and cuisine. ... The Southwest region of the United States is drier than the adjoining Midwest in weather; the population is less dense and, with strong Spanish-American and Native American components, more ethnically varied than neighboring areas. ... The U.S. Northeast is a region of the United States of America defined by the US Census Bureau. ... A speed limit is the maximum speed allowed by law for vehicles on a road. ... State nickname: Treasure State Other U.S. States Capital Helena Largest city Billings Governor Brian Schweitzer (D) Senators Max Baucus (D) Conrad Burns (R) Official language(s) English Area 381,156 km² (4th)  - Land 377,295 km²  - Water 3,862 km² (1%) Population (2000)  - Population 902,195 (44th)  - Density 2. ... Constitutionality is the status of a law, procedure, or act being in accordance with the laws or guidelines contained in a constitution. ...


Texas recently enacted a law allowing 80 MPH speed limits on certain portions of Interstates 10 and 20 in far west Texas. However, these limits are on hold pending further study by the Texas Department of Transportation. A speed limit is the maximum speed allowed by law for vehicles on a road. ...


Dual-purpose design

In addition to being designed to support automobile and heavy truck traffic, interstate highways are also designed for use in military and civil defense operations within the United States, particularly troop movements. The old United States Civil Defense logo. ...


One potential civil defense use of the Interstate Highway System is for the emergency evacuation of cities in the event of a potential nuclear war. Although this use has never happened, the Interstate Highway System has been used to facilitate evacuations in the face of hurricanes and other natural disasters. An option for maximizing throughput is to reverse the flow of traffic on one side so that all lanes become outbound lanes. This procedure is known as Contraflow, and could be seen in the evacuations of New Orleans, Louisiana and Houston, Texas prior to hurricanes Katrina and Rita, respectively. Several Interstates in the South, including I-16 in Georgia, I-40 in North Carolina, I-65 in Alabama, I-10 & I-59 in Louisiana, and I-59 in Mississippi, are equipped and signed specifically for contraflow, with crossovers inland after major interchanges to distribute much of the traffic. This is however not limited to Interstates; US 49 from Gulfport to Jackson and State Road 528, in Central Florida, have the same setup. The old United States Civil Defense logo. ... Evacuation can have several meanings: In wilderness first aid, evacuation is the transport of a seriously injured person out of the wilderness to the nearest point an ambulance can reach to take them to the hospital, or to the nearest emergency room. ... Nuclear War is a card game designed by Douglas Malewicki, and originally published in 1966. ... Tracking and Warning Joint Typhoon warning Center - Western Pacific MetService, New Zealand - Tasman Sea, South Pacific south of 25&deg S Australian Bureau of Meteorology - Southern hemisphere from 90° E to 160° E Canadian Hurricane Centre - Northwest Atlantic (overlaps US NHC) Hurricane & Storm Tracking for the Atlantic & Pacific Oceans - Shows... Contraflow lane reversal is a program designed for quick emergency evacuation of an area. ... Wikinews has news related to this article: Category:New Orleans Disaster Disaster recovery American Red Cross: Official donation site www. ... For other storms named Rita, see Tropical Storm Rita (disambiguation) Hurricane Rita was the seventeenth named tropical storm, ninth hurricane, fifth major hurricane, and second Category 5 hurricane of the 2005 Atlantic hurricane season. ... The U.S. Southern states or the South, also known colloquially as Dixie, constitute a distinctive region covering a large portion of the United States, with its own unique heritage, historical perspective, customs, musical styles, and cuisine. ... I-16 may stand for: Interstate 16, a highway in the US state of Georgia The Polikarpov I-16, a Soviet fighter aircraft introduced in the 1930s This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... Interstate 40 is a major west-east interstate highway in the United States. ... State nickname: Tar Heel State; Old North State Other U.S. States Capital Raleigh Largest city Charlotte Governor Michael Easley (D) Senators Elizabeth Dole (R) Richard Burr (R) Official language(s) English Area 139,509 km² (28th)  - Land 126,256 km²  - Water 13,227 km² (9. ... Interstate 65 is an interstate highway in the United States. ... State nickname: Camellia State, The Heart of Dixie¹, Yellowhammer State Other U.S. States Capital Montgomery Largest city Birmingham Governor Bob Riley (R) Senators Richard Shelby (R) Jeff Sessions (R) Official language(s) English Area 52,423 mi²/135,775 km² (30th)  - Land 50,750 mi²/131,442 km²  - Water... Interstate 10, or I-10, is the southernmost east-west, coast-to-coast interstate highway in the United States. ... Interstate 59 is an interstate highway in the southern United States. ... State nickname: Pelican State Other U.S. States Capital Baton Rouge Largest city New Orleans Governor Kathleen Blanco (D) Senators Mary Landrieu (D) David Vitter (R) Official language(s) None; English and French de facto Area 134,382 km² (31st)  - Land 112,927 km²  - Water 21,455 km² (16%) Population... Interstate 59 is an interstate highway in the southern United States. ... US 49 is a north-south United States highway. ... Gulfport is the name of some places in the United States of America: Gulfport, Florida Gulfport, Mississippi This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... Jackson is the capital and largest city in the U.S. state of Mississippi. ... The Martin Andersen Bee Line Expressway (soon to be renamed the Beachline Expressway), also known as State Road 528, is a limited access toll road connecting Interstate 4 at the International Drive tourist corridor in southwestern Orange County to SR A1A in Cocoa Beach, Florida. ... Central Florida is the central region of the United States state of Florida, on the East Coast. ...


A widespread but false urban legend states that one out of every five miles of the Interstate highway system must be built straight and flat, so as to be usable by aircraft during times of war.[4] However, the Germans in World War II used the Autobahns for just such a purpose. Urban legends are a kind of folklore consisting of stories often thought to be factual by those circulating them (see rumor). ... World War II was a truly global conflict with many facets: immense human suffering, fierce indoctrination, and the use of new, extremely devastating weapons such as the atom bomb. ... The German and Austria autobahn sign The Swiss autobahn sign Autobahn (pronounced in IPA) is the German word for a major high-speed road confined to motor vehicles and having full control of access, similar to a motorway or freeway in English-speaking countries. ...


Terminology

While the name implies that these highways cross state lines, many Interstates do not. Rather, it is the system of interstates that connects states. There are interstate highways in Hawaii, funded in the same way as in the other states, but entirely within the populous island of Oahu. They have the designation of H-X, and connect military bases. Similarly, both Alaska and Puerto Rico have public roads that receive funding from the Interstate program, though these routes are not signed as Interstate Highways. A U.S. state is any one of the fifty states (four of which officially favor the term commonwealth) which, together with the District of Columbia and Palmyra Atoll (an uninhabited incorporated unorganized territory), form the United States of America. ... The following two-digit United States Interstate Highways do not cross state lines. ... State nickname: The Aloha State Other U.S. States Capital Honolulu Largest city Honolulu Monarch Akahi Nui Governor Linda Lingle (R) Senators Daniel Inouye (D) Daniel Akaka (D) Official language(s) Hawaiian and English Area 28,337 km² (43rd)  - Land 16,649 km²  - Water 11,672 km² (41. ... Oahu (usually Oahu outside Hawaiian and Hawaiian English), the Gathering Place, is the third largest of the Hawaiian Islands and most populous island in the State of Hawaii. ... A military base is an isolated facility, settlement, or installation that shelters military equipment and personnel. ... State nickname: The Last Frontier, The Land of the Midnight Sun Other U.S. States Capital Juneau Largest city Anchorage Governor Frank Murkowski (R) Senators Ted Stevens (R) Lisa Murkowski (R) Official language(s) English Area 663,267 mi² / 1,717,854 km² (1st)  - Land 571,951 mi² / 1,481...


Primary routes

The numbering scheme for the Interstate Highway System (as well as the U.S. Highway System) is coordinated by the American Association of State Highway and Transportation Officials (AASHTO), though their authority is occasionally trumped by a number written into Federal law. Within the continental United States, primary Interstates (also called main line Interstates or two-digit Interstates) are given one- or two-digit route numbers. Most Interstates have two numbers; there are only three one-digit Interstates in the system: I-4, I-5 and I-8. Within this category, east-west highways are assigned even numbers, and north-south highways are assigned odd-numbers. Odd route numbers increase from west to east, and even numbered routes increase from south to north. Numbers divisible by 5 are intended to be primary routes, carrying traffic long distances. For example, I-5 runs from Canada to Mexico along the west coast (the only interstate to do so) while I-95 runs from Miami north to Canada. In addition, I-10 runs from Los Angeles, California to Jacksonville, Florida while I-90 runs from Seattle to Boston. However, not all primary routes traverse long distances. I-45 runs from Galveston, Texas north to Dallas, Texas, a distance of only 284 miles. It is the only primary route that does not cross state lines (see List of intrastate Interstate Highways). Current U.S. Highway shield Current U.S. Highway shield in California The United States Highway System is an integrated system of roads in the United States numbered within a nationwide grid. ... AASHTO, the American Association of State Highway and Transportation Officials, is a standards setting body which publishes specifications, test protocols and guidelines which are used in highway design and construction throughout the United States. ... Interstate 4 (abbreviated I-4) is an intrastate Interstate Highway located entirely within the state of Florida, United States. ... This article needs to be cleaned up to conform to a higher standard of quality. ... Interstate 8 is an interstate highway in the southwestern United States. ... In mathematics, a divisor of an integer n, also called a factor of n, is an integer which evenly divides n without leaving a remainder. ... This article needs to be cleaned up to conform to a higher standard of quality. ... Interstate 95 or (I-95) is an interstate highway that runs 1907 miles (3070 kilometers) north-south along the east coast of the United States. ... Downtown Miami City nickname: The Magic City, The American Riviera, The Sixth Borough Location Location of Miami in the State of Florida Government County Miami-Dade Mayor Manuel “Manny” Diaz (R) Physical characteristics Area      Land      Water 139. ... MAJOR JUNCTIONS JUNCTION EXIT # I-5 CA 18-19 I-15 CA 57 I-17 AZ 143 I-17 AZ 150 I-8 AZ 199 I-19 AZ 260 I-25 NM 145 I-20 TX 187 I-35 TX 570-572 I-45 TX 768 I-49 LA 103... The City of Los Angeles (from Spanish; Los Ángeles, ) also known simply as L.A., is the second-largest city in the United States in terms of population, as well as one of the worlds most important economic, cultural, and entertainment centers. ... The Jacksonville skyline and the Acosta Bridge. ... INTERSTATE JUNCTIONS JUNCTION EXIT # I-5 WA 2 I-82 WA 110 I-15 MT 219 - 227 I-94 MT 456 I-25 WY 55 I-29 SD 396 I-35 MN 159 I-94 WI 44 - 138 I-39 WI 108 - IL 17 I-94 IL 89 - 102 I... Downtown Seattle skyline City nickname: The Emerald City Location Location of Seattle in King County and Washington Government County King Mayor Greg Nickels NP/Democrat ¹ Physical characteristics Area      Land      Water 369. ... For other instances of Boston, see Boston (disambiguation) Boston is the capital and largest city in the Commonwealth of Massachusetts in the United States. ... Interstate 45 is an intrastate interstate highway located entirely within the state of Texas, United States. ... Downtown Galveston Galveston is an island city located in Galveston County, Texas, USA within the Greater Houston region of Southeast Texas. ... Aerial view of Dallas City nickname: Big D Location Location in the state of Texas Government Counties Dallas County Collin County Denton County Kaufman County Rockwall County Mayor Laura Miller Physical characteristics Area      Land      Water 385. ... The following two-digit United States Interstate Highways do not cross state lines. ...


It should be noted that I-50 and I-60 do not exist (and there are no even-numbered Interstates between 46 and 62), mainly because they would most likely have passed through the same states that already have US 50 and US 60. AASHTO rules discourage Interstate and US Highways with the same number to exist in the same state, although I-24 and US 24 exist at opposite ends of Illinois. Some planned Interstates do not follow this guideline - I-69 will enter Texas (which has US 69), I-74 will have a multiplex with US 74 in North Carolina, and I-41 will do the same with US 41 in Wisconsin. United States Highway 50 is an east-west United States highway. ... United States Highway 60 is an east-west United States highway, running 2,670 miles (4,300 km) from Virginia to Arizona. ... Interstate 24 (abbreviated I-24) is an interstate highway in the eastern United States. ... U.S. Highway 24, a dual north-south/east-west route, is one of the original United States highways of 1926. ... State nickname: Land of Lincoln, The Prairie State Other U.S. States Capital Springfield Largest city Chicago Governor Rod Blagojevich (D) Senators Richard Durbin (D) Barack Obama (D) Official language(s) English Area 149,998 km² (25th)  - Land 143,968 km²  - Water 6,030 km² (4. ... Interstate 69 is an interstate highway in the midwestern United States. ... ... US 69 is a north-south United States highway. ... INTERSTATE JUNCTIONS JUNCTION EXIT # I-80 IA 1 I-80 IL 14 I-55 IL 127 IL 134 I-57 IL 179 I-70 IN 9, on I-465 I-65 IN 53, on I-465 I-75 OH 20 Legend BROWSE STATE HWYS Prev Next {{{browse}}} Interstate 74 is... A multiplex or concurrency on a road network occurs where a single physical road carries two or more different highway, motorway, or other road numbers. ... United States Highway 74 is an east-west United States highway that runs for 524 miles (843 km) from southeast North Carolina to Chattanooga, Tennessee. ... State nickname: Tar Heel State; Old North State Other U.S. States Capital Raleigh Largest city Charlotte Governor Michael Easley (D) Senators Elizabeth Dole (R) Richard Burr (R) Official language(s) English Area 139,509 km² (28th)  - Land 126,256 km²  - Water 13,227 km² (9. ... The Interstate Highway system is still being expanded. ... United States Highway 41 is a north-south United States Highway that runs from the Upper Peninsula of Michigan to Miami, Florida. ... State nickname: Badger State Other U.S. States Capital Madison Largest city Milwaukee Governor Jim Doyle (D) Senators Herb Kohl (D) Russ Feingold (D) Official language(s) None Area 169,790 km² (23rd)  - Land 140,787 km²  - Water 28,006 km² (17%) Population (2000)  - Population 5,453,896 (18th)  - Density...


Several two-digit numbers are shared between two roads at opposite ends of the country, namely I-76, I-84, I-86 and I-88. Some of these were the result of a change in the numbering system in the 1970s; previously letter-suffixed numbers were used for long spurs off primary routes; for example, western I-84 was I-80N, as it went north from I-80. In the 1970s, AASHTO decided to eliminate these; some became additional two-digit routes, while others became three-digit routes (see below). Only two pairs of these exist; I-35 splits into I-35W and I-35E through both the Dallas-Fort Worth and the Minneapolis-St. Paul areas. There is also a game called Interstate 76, developed by Activision and referring to the year 1976. ... Interstate 84 is the designation of two interstate highways in the United States. ... Interstate 86 is the designation of two interstate highways in different parts of the United States. ... Interstate 88 is the designation of two intrastate interstate highways in different parts of the United States. ... The 1970s in its most obvious sense refers to the decade between 1970 and 1979. ... Columbia River Gorge and I-84 as seen from Crown Point, Oregon Interstate 84 runs from an intersection with Interstate 5 at Portland, Oregon to an intersection with Interstate 80 at Echo, Utah—roughly the same route as the Oregon Trail. ... Interstate 80 as seen from an overpass in Davis, California Interstate 80 is the second-longest interstate highway in the United States. ... Interstate 35 is an interstate highway in the central United States. ... Interstate 35W is the name of the western half of Interstate 35, which is used in two regions along its length. ... Interstate 35E is the name used for the eastern half of Interstate 35 in two segments where the highway splits to serve different cities. ... The Dallas/Fort Worth Metroplex encompasses the metropolitan divisions of Dallas–Plano–Irving and Fort Worth–Arlington, within the U.S. state of Texas. ... The Twin Cities of Minneapolis and St. ...


Strict adherence to the directional nature of the system results in some amusing oddities. For a ten-mile stretch east of Wytheville, Virginia, the driver can be traveling on both North I-81 and South I-77 at the same time (and vice versa) (see also Wrong-way multiplex). Wytheville is a town located in Wythe County, Virginia. ... A wrong-way multiplex in the interior of British Columbia; 97 south is 5 north is 1 east A wrong-way multiplex occurs in highway numbering systems when two roads, nominally going in opposite directions, are routed in the same direction along one stretch of road. ...


For the sake of efficiency, some Interstates double up for short or sometimes long distances, as in the example above. Another notable example are Interstates I-90 and I-94, which double and then separate several times as they criss-cross the upper Midwest and Great Plains.


Three-digit Interstates

Three-digit route numbers, consisting of a single digit prefixed to the number of a primary Interstate highway, are used to designate usually short spur or loop routes from their "parent" route, either directly or via another three-digit Interstate. A route that spurs from its parent and ends at an intersection with no other Interstates is given an odd first digit; a route that returns to its parent is given an even first digit. The number given to the first digit of a route that spurs from the parent and ends at another Interstate depends on the state; some consider these routes spurs and give them odd numbers, while others consider them loop-style connectors and give them even numbers.


For instance, I-90 in New York has a full set of three-digit Interstates - I-190, I-290, I-390, I-490, I-590, I-690, I-790, I-890 and I-990. Due to the large number of these routes, they can be repeated in different places along the mainline; no two three-digit Interstates in the same state can share a number. Interstate 90 is the longest interstate highway in the United States. ... State nickname: The Empire State Official languages None. ... New Yorks I-190 runs for 28 miles from I-90 near Buffalo, New York to Lewiston, New York via Niagara Falls. ... New Yorks Interstate 290 runs for 10 miles near Buffalo, New York from I-90 to I-190. ... Interstate 390 an Interstate Highway that is located entirely in the state of New York. ... The 37. ... Interstate 590 is a tertiary spur interstate route of Interstate 90 in the state of New York. ... The never fully-utilized intersection of Interstate 481 and Interstate 690 in East Syracuse. ... Interstate 790 is a tertiary spur interstate route of Interstate 90. ... Interstate 890 is a 9. ... Interstate 990 is a short Interstate Highway, located entirely in the state of New York. ...


The Minneapolis-St. Paul area has a single loop around the entire Metro area. I-94 intersects the loop in two spots and runs directly through it separating it into a northern and southern half. The southern half of it is labeled I-494 while the northern half of it is labeled I-694. The Twin Cities of Minneapolis and St. ... Interstate 94 is a long interstate highway connecting the Great Lakes and Intermountain region of the United States. ... Interstate 94 is a long interstate highway connecting the Great Lakes and Intermountain region of the United States. ... Interstate 94 is a long interstate highway connecting the Great Lakes and Intermountain region of the United States. ...


Charlotte, North Carolina has a single loop around the city that intersects with both I-77 and I-85, but the entire loop is known as I-485. County Mecklenburg Mayor Pat McCrory, (R) Area  - Total  - Water 629. ... Interstate 77 is an interstate highway in the eastern United States. ... Interstate 85 is an interstate highway in the southeastern United States. ... Interstate 485 is an interstate highway and a partially completed beltway around Charlotte, North Carolina. ...


The Baltimore-Washington metropolitan area has several spur routes off of I-95. The area has I-195, I-295, I-495, I-795 and I-895. It also has two routes numbered I-395 (in Baltimore and Washington) and two I-695s (one is signed, the other is a secret designation), as well as an unsigned route called I-595. No I-995 exists anywhere. Baltimore skyline at dusk Motto: The Greatest City in America (formerly The City That Reads; BELIEVE is not the official motto but rather a specific campaign) Nickname: Charm City Mob Town B-more Location in Maryland Founded Incorporated 30 July 1729 1797  County Independent city Mayor Martin J. OMalley... Washington, D.C. is the capital city of the United States of America. ... Interstate 95 or (I-95) is an interstate highway that runs 1907 miles (3070 kilometers) north and south along the eastern United States coast. ... Interstate 195 in Maryland is a spur of Interstate 95 just south of Baltimore that travels from Interstate 95 to Baltimore-Washington International Airport. ... The 8. ... The Capital Beltway (in green) The Capital Beltway (Interstate 495) is a freeway-class interstate highway which circles the Washington, DC area. ... Interstate 795 (Northwest Expressway) is a nine-mile freeway linking Baltimores northwestern suburbs of Pikesville, Owings Mills and Reisterstown, Maryland to the Baltimore Beltway (Interstate 695). ... The Harbor Tunnel Thruway, signed as Interstate 895, is a 17-mile long expressway that serves as a bypass of Baltimore, Maryland. ... The 2 mile long Interstate 395 is a spur of Interstate 95 that travels from Interstate 95 to downtown Baltimore. ... Interstate 395 in Virginia is a 13 mile long spur route that begins at a junction with Interstate 95 in Springfield, Virginia and ends in downtown Washington, District of Columbia. ... The Baltimore Beltway, Interstate 695, is a full beltway interstate highway extending around Baltimore, Maryland. ... Interstate 695 is the unsigned designation for the Southeast Freeway in Washington, D.C., running east from I-395 past the north end of I-295 to end at Pennsylvania Avenue. ... Interstate 595 is an unsigned number for a section of US 50 (the John Hanson Highway) from the Capital Beltway (I-95/I-495) east of Washington, D.C. to MD 70 at Annapolis, Maryland. ...


New York City has numerous spur routes off of I-78 and I-95, but none of I-78's spur routes actually intersect with I-78. New York City, officially named the City of New York, is the most populous city in the United States, and the most densely populated major city in North America. ... Interstate 78 is an interstate highway in the eastern United States. ... Interstate 95 or (I-95) is an interstate highway that runs 1907 miles (3070 kilometers) north and south along the eastern United States coast. ...


A three-digit spur off a letter-suffixed two-digit Interstate (see above) was given a number without a letter suffix, except for one case - I-184 in Idaho was I-180N. Interstate 184 is a short interstate spur route of Interstate 84 located in Idaho. ... State nickname: Gem State Official languages English Capital Boise Largest city Boise Governor Dirk Kempthorne (R) Senators Larry Craig (R) Mike Crapo (R) Area  - Total  - % water Ranked 14th 216,632 km² 0. ...


Exceptions

Main article: List of gaps in Interstate Highways

Interstate 238 near Oakland, California is one of two major exceptions to the numbering scheme, as no Interstate 38 exists. This number exists because Interstate 238 replaced a segment of California Highway 238, and no appropriate number was available. The other exception is I-99 in Pennsylvania, which was written into law as I-99 by Pennsylvania Congressman Bud Shuster; I-99 (which is also U.S. Highway 220) is west of several Interstates that are numerically less than 99, and was the nearest available unused two-digit number. For the most part, the United States Interstate Highway System is a connected system, with most roads completed. ... MAJOR JUNCTIONS JUNCTION EXIT # Legend BROWSE STATE HWYS CA-238 CA-239 Interstate 238 (abbreviated I-238) is a short (2. ... View of downtown Oakland looking west across Lake Merritt. ... California State Highway 238, or CA-238 for short, is a north-south highway in the southeastern part of the San Francisco Bay Area. ... Interstate 99 (abbreviated I-99) is a part of the U.S. Interstate highway system. ... State nickname: The Keystone State Official languages None Capital Harrisburg Largest city Philadelphia Governor Ed Rendell (D) Senators Arlen Specter (R) Rick Santorum (R) Area  - Total  - % water Ranked 33rd 119,283 km² 2. ... E.G. Bud Shuster (b. ... U.S. Highway 220 is a 680 mile long spur route of U.S. Highway 20 (although the two never intersect). ...


Some proposed future Interstate routes have been given similarly non-conforming designations by their legislative proponents. For example, backers of the proposed Third Infantry Division Highway, a route in Georgia and Tennessee, have suggested it be named Interstate 3, in honor of the division for which the highway is named [5]. State nickname: Volunteer State Other U.S. States Capital Nashville Largest city Memphis Governor Phil Bredesen (D) Senators Bill Frist (R) Lamar Alexander (R) Official language(s) English Area 109,247 km² (36th)  - Land 106,846 km²  - Water 2,400 km² (2. ... The Interstate Highway system is still being expanded. ... Shoulder sleeve patch of the United States Army 3d Infantry Division (Mechanized). ...


Other notable examples

  • I-82 lies fully north of I-84, but I-84 was I-80N when I-82 got its number.
  • I-85 diverts west of I-75 (intersecting it near Atlanta, Georgia)

The following two-digit Interstates change signed direction from their normal (even=east-west, odd=north-south) direction: Interstate 82 is an interstate highway in the northwestern United States. ... Interstate 84 is the designation of two interstate highways in the United States. ... Interstate 85 is an interstate highway in the southeastern United States. ... Interstate 75 is an interstate highway in the midwest and southeastern United States. ... Atlanta is the capital and largest city of Georgia, a state of the United States of America. ...

  • I-69
  • I-76 (west)

Two-digit interstates in Hawaii, as well as the "paper" interstates of Alaska and Puerto Rico, are numbered sequentially in order of funding, without regard to the rules on odd and even numbers. Interstate 69 is an interstate highway in the midwestern United States. ... Interstate 76 runs from Interstate 70 in Denver, Colorado to an intersection with Interstate 80 near Big Springs, Nebraska. ... State nickname: The Aloha State Other U.S. States Capital Honolulu Largest city Honolulu Monarch Akahi Nui Governor Linda Lingle (R) Senators Daniel Inouye (D) Daniel Akaka (D) Official language(s) Hawaiian and English Area 28,337 km² (43rd)  - Land 16,649 km²  - Water 11,672 km² (41. ... State nickname: The Last Frontier, The Land of the Midnight Sun Other U.S. States Capital Juneau Largest city Anchorage Governor Frank Murkowski (R) Senators Ted Stevens (R) Lisa Murkowski (R) Official language(s) English Area 663,267 mi² / 1,717,854 km² (1st)  - Land 571,951 mi² / 1,481...


Business Loop and Business Spur Interstates are not subject to any of the Interstate standards. Their designation is simple - a Business Loop heads into a downtown area from its parent and returns to its parent; a Business Spur ends downtown, occasionally continuing from the end of the main Interstate. Business routes can split from either two- or three-digit Interstates, and can be repeated within a state. In a few cases, where an Interstate has been realigned, the old road has been designated a Business Loop because it is not up to standards. Business Loop I-95 shield A Business Loop Interstate is one of two types of Business Interstates (Business Spur being the other). ... Business Spur I-95 shield A Business Spur Interstate is one of two types of Business Interstates (Business Loop being the other). ... The American Association of State Highway and Transportation Officials (AASHTO) defines standards for Interstate Highways in their publication A Policy on Design Standards - Interstate System. ...


Financing

About 72% (2003 FHWA summary) of the construction and maintenance costs are funded through user fees, primarily gasoline taxes, collected by states and the federal government, and tolls collected on toll roads and bridges. The rest of the costs come out of the federal budget. In the eastern United States, large sections of some Interstate Highways planned or built prior to 1956 are operated as toll roads. The taxes dedicated to the construction and maintenance of highways are often criticized as a direct subsidy from the government to promote and maintain auto-oriented development as we know it today. A gasoline tax (also known as a gas tax, petrol tax, fuel tax or fuel duty) is a sales tax imposed on the sale of gasoline. ... The word toll has several meanings. ... A high-speed toll booth on SR 417 near Orlando, Florida A toll gate on the Sayama bypass (Saitama prefectural road 397) in Japan A toll gate on the Dom Pedro I Highway near the city of Itatiba, Brazil A toll road, turnpike or tollpike is a road on which... A log bridge A bridge is a structure built to span a gorge, valley, road, railroad track, river, body of water, or any other physical obstacle. ... 1956 (MCMLVI) was a leap year starting on Sunday of the Gregorian calendar. ... A toll road, turnpike or tollpike is a road on which a toll authority collects a fee for use. ...


The dominant role of the federal government in road finance has enabled it to pass laws in areas outside of the powers enumerated in the federal Constitution. By threatening to withhold highway funds, the federal government has been able to force state legislatures to pass a variety of laws. Examples include increasing the legal drinking age to 21, for a number of years reducing the maximum speed limit to 55 miles per hour, passing Megan's Law legislation, lowering the legal intoxication level to 0.08/1000, and other laws. This has proved to be controversial. Those who support this feel that it is a way to provide an impetus to states to pass uniform legislation. Others feel that using highway dollars in this fashion upsets the balance between federal and states' rights in favor of the federal government, and effectively holds funds as ransom in order to coerce state governments into passing laws that would not have otherwised been introduced. A legislature is a governmental deliberative assembly with the power to adopt laws. ... Legal drinking age is the minimum age one must be to drink alcohol. ... A speed limit is the maximum speed allowed by law for vehicles on a road. ... A mile is any of several units of distance, or, in physics terminology, of length. ... Megans Law is the colloquial term used to denote a number of state laws in the United States that require law enforcement authorities to identify what are generally called sex offenders to the public at large through various media, including in some cases the Internet. ... ... The dollar (represented by the dollar sign: $) is the name of the official currency in several countries, dependencies and other regions. ...


As American suburbs push ever outward, the costs incurred of maintaining freeway infrastructure has started to catch up with the economy, leaving little in the way of funds for new interstate construction[6]. This has led to the proliferation of the toll road (turnpike) as the new method of building limited-access highways in suburban areas. Also, some interstates are being privately maintained now (VMS in Texas, I-35) in order to cut rising costs of maintenance and allow state departments of transportation to focus on serving the fastest growing regions in their respective states. The future of the interstate system as we know it is in question. It is entirely possible that parts of the system will have to be tolled in the future to meet maintenance and expansion demands, as is done with adding toll HOV/HOT lanes in certain cities like Minneapolis, Houston, Dallas, and Washington D.C.


Non-chargeable Interstate routes

In addition to Interstate highways financed with federal funds (Chargeable Interstate routes), federal laws allow other highways to be signed as Interstates, if they meet the Interstate Highway standards and that they are logical additions or connections to the System.


Called Non-Chargeable Interstate routes, these additions fall under two categories:

  1. Routes that already meet Interstate standards. They can immediately be signed as Interstates once their proposed number is approved.
  2. Routes designated as a future part of the system once they are upgraded to Interstate standards. Until then, it cannot be signed as an Interstate yet.

Signage

I-95 shield
I-95 shield

Interstate Highways are signed by a number on a red, white and blue sign as shown to the right. In the original design, the state was formerly listed above the highway number, but in many states, this area is now left blank. The sign itself measures 36 inches high, and is 36 inches wide for two-digit interstates, or 45 inches for three-digit interstates. Route marker sign: Interstate 95 File links The following pages link to this file: United States Interstate Highway Interstate 95 List of Interstate Highways Interstate 295 (Florida) Interstate 495 (New York) Interstate 495 (Massachusetts) Interstate 495 (Capital Beltway) Interstate 695 (Maryland) Interstate 295 (New York) Interstate 295 (Virginia) Interstate 395... Route marker sign: Interstate 95 File links The following pages link to this file: United States Interstate Highway Interstate 95 List of Interstate Highways Interstate 295 (Florida) Interstate 495 (New York) Interstate 495 (Massachusetts) Interstate 495 (Capital Beltway) Interstate 695 (Maryland) Interstate 295 (New York) Interstate 295 (Virginia) Interstate 395... Interstate 95 or (I-95) is an interstate highway that runs 1907 miles (3070 kilometers) north and south along the eastern United States coast. ...


Business Loop and Business Spur Interstates use a special shield where the red and blue are replaced with green; the word BUSINESS appears instead of INTERSTATE, and the word SPUR or LOOP usually appears above the number. Business Loop I-95 shield A Business Loop Interstate is one of two types of Business Interstates (Business Spur being the other). ... Business Spur I-95 shield A Business Spur Interstate is one of two types of Business Interstates (Business Loop being the other). ...


The majority of Interstates have exit numbers. All traffic signs and lane markings on the Interstates are supposed to be designed in compliance with the Manual on Uniform Traffic Control Devices (MUTCD). However, there are many local and regional variations in signage. The state of California is now adapting to an exit numbering system after many years as being the only state in the country that did not use such a system. Exit numbers on Interstate 4 in Volusia County, Florida. ... This article needs to be cleaned up to conform to a higher standard of quality. ... The word lane has two meanings: A narrow road, usually lacking a shoulder or a median. ... The Manual on Uniform Traffic Control Devices (MUTCD) is a document issued by the Federal Highway Administration (FHWA) of the United States Department of Transportation (USDOT) to specify the standards by which traffic signs, road markings (see lane), and signals are designed and installed. ... State nickname: The Golden State Official languages English Capital Sacramento Largest city Los Angeles Governor Arnold Schwarzenegger (R) Senators Dianne Feinstein (D) Barbara Boxer (D) Area  - Total  - % water Ranked 3rd 410,000 km² 4. ...


In most states, the exit numbers correspond to the mileage markers on the Interstates (with an exception being I-19 in Arizona, whose length is measured in kilometers instead of miles). Many northeastern states label exit numbers sequentially, regardless of how many miles have passed between exits. On even-numbered Interstates, mileage increases to the east and decreases to the west; and on odd-numbered Interstates, mileage increases to the north and decreases to the south. In both cases, the exit numbers increase and decrease accordingly. A mile is any of several units of distance, or, in physics terminology, of length. ... Interstate 19 (abbreviated I-19) is an intrastate interstate highway located entirely within the state of Arizona, United States. ... State nickname: The Grand Canyon State, The Copper State Other U.S. States Capital Phoenix Largest city Phoenix Governor Janet Napolitano (D) Senators John McCain (R) Jon Kyl (R) Official language(s) English Area 295,254 km² (6th)  - Land 294,312 km²  - Water 942 km² (0. ... A kilometre (American spelling: kilometer) (symbol: km) is a unit of length equal to 1000 metres (from the Greek words khilia = thousand and metro = count/measure). ...


Interstate oddities

  • Vinita, Oklahoma — A McDonalds is built over the top of Interstate 44. It goes from one side of the interstate to the other, passing over the interstate. Customers can sit inside and eat while traffic drives beneath them. It is also purported to be the "world's largest".
  • Kearney, Nebraska — The Great Platte River Road Archway Museum is built over top of Interstate 80. The 1,500 ton structure spans 308 feet across the interstate and houses a museum dedicated to frontier culture.
  • Boston, Massachusetts — The Prudential Tower in downtown Boston is built over top of Interstate 90 as well. A less known fact about Interstate 90 is that it is built over what used to be the largest railroad corridor in New England; photos from the 1950s show huge rail yards where I-90 now comes into the city. Many of the oddities on I-90 are the result of deals struck by the Massachusetts Turnpike Authority, Perini Corporation (which constructed the majority of the highway), and existing buildings at the time of construction. In return for not obstructing the highway project, the MTA went to lengths such as preserving the aforementioned Star Market.
  • Atlanta, Georgia — The Civic Center MARTA station is located over the Downtown Connector (Interstate 75/85) at West Peachtree Street, making it the only subway station built over an Interstate highway.
  • Seattle, Washington — The Seattle Freeway Park sits on top of Interstate 5 (NB and SB, including HOV express lanes). The park is connected to the Washington State Convention Center connecting downtown to the Capitol Hill and First Hill districts (locally, First Hill is also known as "Pill Hill" as this is Seattle's medical district). The park is multi-level and as such, there are areas where visitors are able to watch traffic pass by.
  • Breezewood, Pennsylvania — There is a sign of a policeman pointing at you saying, "You! Slow Down!" You then have to drive a few blocks on US 30 before returning to I-70. This is a rare instance of a traffic light on an interstate.

Vinita is a city located in Craig County, Oklahoma. ... McDonalds Corporation (NYSE: MCD) is the worlds largest chain of fast-food restaurants [1]. Although McDonalds did not invent the hamburger or fast food, its name has become nearly synonymous with both. ... MAJOR JUNCTIONS JUNCTION MILEPOST I-40 Oklahoma 120 I-35 Oklahoma 130-135 I-55 Missouri 290 Legend BROWSE STATE HWYS   Interstate 44 is an interstate highway in the central United States. ... Parade of U.S. Infantry through Kearney, Nebraska, 1888. ... MAJOR JUNCTIONS JUNCTION EXIT # US-101 CA 0 20px I-880 CA ? I-580 CA ? CA ? I-680 CA ? I-780 CA ? I-505 CA ? I-5 CA ? California/Nevada State Line CA ?/NV ? I-580 NV ? Nevada/Utah State Line NV ?/UT ? I-215 UT ? I-505 UT ? UT... City nickname: The Biggest Little City in the World Founded May 13, 1868 County Washoe County Mayor Bob Cashell Area  - Total  - Land  - Water 179. ... Exterior view of a typical Walgreens store. ... Newton, Massachusetts is a suburb west of Boston. ... Exterior appearance of typical American supermarket (a Safeway) Supermarket produce section A supermarket or grocery store is a store that sells a wide variety of food. ... INTERSTATE JUNCTIONS JUNCTION EXIT # I-5 WA 2 I-82 WA 110 I-15 MT 219 - 227 I-94 MT 456 I-25 WY 55 I-29 SD 396 I-35 MN 159 I-94 WI 44 - 138 I-39 WI 108 - IL 17 I-94 IL 89 - 102 I... Overpass in East Potomac Park, Washington, D.C. Flyover in Miami Beach, Florida An overpass (In UK, most Commonwealth countries flyover) is a bridge, road or similar structure that crosses over another road. ... Newton, Massachusetts is a suburb west of Boston. ... INTERSTATE JUNCTIONS JUNCTION EXIT # I-5 WA 2 I-82 WA 110 I-15 MT 219 - 227 I-94 MT 456 I-25 WY 55 I-29 SD 396 I-35 MN 159 I-94 WI 44 - 138 I-39 WI 108 - IL 17 I-94 IL 89 - 102 I... For other instances of Boston, see Boston (disambiguation) Boston is the capital and largest city in the Commonwealth of Massachusetts in the United States. ... INTERSTATE JUNCTIONS JUNCTION EXIT # I-5 WA 2 I-82 WA 110 I-15 MT 219 - 227 I-94 MT 456 I-25 WY 55 I-29 SD 396 I-35 MN 159 I-94 WI 44 - 138 I-39 WI 108 - IL 17 I-94 IL 89 - 102 I... // Events and trends The 1950s in Western society was marked with a sharp rise in the economy for the first time in almost 30 years and return to the 1920s-type consumer society built on credit and boom-times, as well as the the baby boom from returning GIs who... Atlanta is the capital and largest city of Georgia, a state of the United States of America. ... MARTA is the common name for Atlantas rapid transit system, consisting of a network of bus routes linked to a heavy rail rapid transit system. ...   Downtown Connector (10th St. ... State nickname: Land of Lincoln, The Prairie State Other U.S. States Capital Springfield Largest city Chicago Governor Rod Blagojevich (D) Senators Richard Durbin (D) Barack Obama (D) Official language(s) English Area 149,998 km² (25th)  - Land 143,968 km²  - Water 6,030 km² (4. ... The Belvidere Oasis An Illinois Tollway Oasis is a type of service plaza that is found along Interstate Highways that are toll roads in Illinois. ... The Tri-State Tollway is a US toll road maintained by the Illinois State Toll Highway Authority in northeastern Illinois. ... The Northwest Tollway in Illinois is a 79 mile (127 km) segment of Interstate 90 from Interstate 190 in far northwest Chicago to Illinois State Route 75, one mile south of the Wisconsin state line. ... The Ronald Reagan Memorial Tollway, originally known as the East-West Tollway, is a toll road in northern Illinois. ... Interstate 88 is entirely within the state of Illinois. ... Downtown Seattle skyline City nickname: The Emerald City Location Location of Seattle in King County and Washington Government County King Mayor Greg Nickels NP/Democrat ¹ Physical characteristics Area      Land      Water 369. ... This article needs to be cleaned up to conform to a higher standard of quality. ... Breezewood is a town in Bedford County in south-central Pennsylvania, known mainly for a gap in Interstate 70 that is not up to Interstate standards. ... United States Highway 30 is an east-west United States highway that traverses the United States. ... Jersey City is a city located in Hudson County, New Jersey, United States. ... Interstate 78 is an interstate highway in the eastern United States. ... A toll ticket for the New Jersey Turnpike. ... The Holland Tunnel, originally known as the Hudson River Vehicular Tunnel or the Canal Street Tunnel, is one of two highway tunnels under the Hudson River connecting the island of Manhattan with New Jersey on the mainland (the Lincoln Tunnel is the other one). ... New York City, officially named the City of New York, is the most populous city in the United States, and the most densely populated major city in North America. ...

Criticism

In addition to the various economic issues, the system has roused criticism on aesthetic grounds. The efficiency and faster speeds of the system, made possible in part by engineering techniques that often tend to cut through the land rather than merely following it as with the older U.S. Highway, have inevitably resulted in a safer but less-scenic drive. When the cross-country I-40 was finally finished in the late 1980s, by completing the segment between Raleigh, North Carolina and Wilmington, North Carolina, Charles Kuralt stated, "It is now possible to travel from coast to coast without seeing anything!" Current U.S. Highway shield Current U.S. Highway shield in California The United States Highway System is an integrated system of roads in the United States numbered within a nationwide grid. ... INTERSTATE JUNCTIONS JUNCTION EXIT # I-15 CA 0 I-17 AZ 195 I-25 NM 159 I-44 OK 147 I-35 OK 150-152 I-30 AR 153 I-55 AR 277-279 I-65 TN 210-211 I-75 TN 368-385 I-81 TN 421 I-26... Downtown Raleigh Skyline Raleigh is the capital of North Carolina, a state of the United States of America. ... For other places called Wilmington, see Wilmington Wilmington is a city currently located in New Hanover County, North Carolina. ... Charles Kuralt (10 September 1934 – 4 July 1997) was an award-winning American journalist. ...


References

  1. ^  65 MPH Approved for Route, Wichita Eagle-Beacon, October 24, 1987
  2. ^  Field, David. "On 40th birthday, interstates face expensive midlife crisis." Insight on the News, 29 July 1996, 40-42.

October 24 is the 297th day of the year (298th in leap years) in the Gregorian Calendar, with 68 days remaining. ... 1987 (MCMLXXXVII) is a common year starting on Thursday of the Gregorian calendar. ...

See also

edit
Primary Interstate Highways
Interstate Highway marker
4 5 8 10 12 15 16 17 19 20 22 24 25 26 27 29
30 35 37 39 40 43 44 45 49 55 57 59 64 65 66 68
69 70 71 72 73 74 75 76 (W) 76 (E) 77 78 79 80 81
82 83 84 (W) 84 (E) 85 86 (W) 86 (E) 87 88 (W) 88 (E)
89 90 91 93 94 95 96 97 99 238 H-1 H-2 H-3
Unsigned  A-1 A-2 A-3 A-4 PRI-1 PRI-2 PRI-3
Two-digit - Three-digit - Proposed - Unsigned - Gaps - Intrastate
Interstate standards

Download high resolution version (768x768, 17 KB) Wikipedia does not have an article with this exact name. ... Interstate 4 (abbreviated I-4) is an intrastate Interstate Highway located entirely within the state of Florida, United States. ... This article needs to be cleaned up to conform to a higher standard of quality. ... Interstate 8 is an interstate highway in the southwestern United States. ... MAJOR JUNCTIONS JUNCTION EXIT # I-5 CA 18-19 I-15 CA 57 I-17 AZ 143 I-17 AZ 150 I-8 AZ 199 I-19 AZ 260 I-25 NM 145 I-20 TX 187 I-35 TX 570-572 I-45 TX 768 I-49 LA 103... Interstate 12 is an intrastate interstate highway located entirely within the state of Louisiana, United States. ... MAJOR JUNCTIONS JUNCTION EXIT # I-5 CA 0 I-805 CA 3 I-8 CA 6 I-215 CA 63 I-10 CA 109 I-215 CA 123 US-395 CA 141 I-40 CA 184 I-215 NV 34 US-93 /US-95 NV 42 US-93 NV 64... Interstate 16 (abbreviated I-16), or Georgia State Route 404, is an intrastate interstate highway located entirely within the state of Georgia, United States. ... Interstate 17 is an intrastate interstate highway located entirely within the state of Arizona, United States. ... Interstate 19 (abbreviated I-19) is an intrastate interstate highway located entirely within the state of Arizona, United States. ... Interstate 20 (abbreviated I-20) is an interstate highway in the southeastern United States. ... Previously known as Corridor X (one of the Appalachian Regional Corridors), Interstate 22, when completed, will follow the U.S. Highway 78 corridor along a 176 mile (283 km) route from Memphis, Tennessee to Birmingham, Alabama. ... Interstate 24 (abbreviated I-24) is an interstate highway in the eastern United States. ... Interstate 25 is an interstate highway in the western United States. ... MAJOR JUNCTIONS JUNCTION MILEPOST {{{junction}}} Legend BROWSE STATE HWYS {{{browse}}} Interstate 26 (abbreviated I-26) is an interstate highway in the southeastern United States. ... Interstate 27 is an intrastate interstate highway located entirely within the state of Texas in the United States. ... Interstate 29 is an interstate highway in the Midwestern United States. ... Interstate 30 (abbreviated I-30) is an interstate highway in the southern United States. ... MAJOR JUNCTIONS JUNCTION MILEPOST Mexican Border Texas 0 I-10 Texas 158 I-20 Texas 418 (I-35E) I-30 Texas 427-428 (I-35E) I-40 Oklahoma 126-128 I-44 Oklahoma 133-138 I-70 Missouri 3 I-80 Iowa 72-87 I-90 Minnesota 13 I-94... Interstate 37 is an intrastate interstate highway located within the state of Texas, United States. ... Interstate 39 is an interstate highway in the midwestern United States. ... INTERSTATE JUNCTIONS JUNCTION EXIT # I-15 CA 0 I-17 AZ 195 I-25 NM 159 I-44 OK 147 I-35 OK 150-152 I-30 AR 153 I-55 AR 277-279 I-65 TN 210-211 I-75 TN 368-385 I-81 TN 421 I-26... Interstate 43 is an intrastate interstate highway located entirely within the state of Wisconsin, United States. ... MAJOR JUNCTIONS JUNCTION MILEPOST I-40 Oklahoma 120 I-35 Oklahoma 130-135 I-55 Missouri 290 Legend BROWSE STATE HWYS   Interstate 44 is an interstate highway in the central United States. ... Interstate 45 is an intrastate interstate highway located entirely within the state of Texas, United States. ... Interstate 49 is an intrastate interstate highway located entirely within the state of Louisiana, United States. ... Interstate 55 is an interstate highway in the central United States. ... Interstate 57 is an interstate highway in the midwestern United States. ... Interstate 59 is an interstate highway in the southern United States. ... Interstate 64 is an Interstate Highway in the eastern United States. ... Interstate 65 (abbreviated I-65) is an Interstate Highway in the United States. ... Interstate 66 is an interstate highway in the eastern United States. ... Interstate 68 is an interstate highway in the United States. ... Interstate 69 is an interstate highway in the midwestern United States. ... MAJOR JUNCTIONS JUNCTION EXIT # I-15 Utah 0 I-82 Colorado 269 I-25 Colorado 274 I-35 Missouri 1 - 2 I-29 Missouri 2 I-64 Missouri 251 - Illinois 3 I-55 Missouri 251 - Illinois 20 I-44 Missouri 251 - State line I-57 Illinois 92 - 98 I-74... INTERSTATE JUNCTIONS JUNCTION EXIT # I-64 KY 1 I-75 KY 77 OH 1 I-70 OH 106 OH 107 I-76 OH 209 I-80 OH 233 I-90 OH 247 Legend BROWSE STATE HWYS Prev Next {{{browse}}} Interstate 71 is an Interstate Highway in the Southeastern and Midwestern... Interstate 72 is an interstate highway in the midwestern United States. ... Interstate 73 (I-73) is an intrastate interstate highway currently located entirely within the state of North Carolina. ... INTERSTATE JUNCTIONS JUNCTION EXIT # I-80 IA 1 I-80 IL 14 I-55 IL 127 IL 134 I-57 IL 179 I-70 IN 9, on I-465 I-65 IN 53, on I-465 I-75 OH 20 Legend BROWSE STATE HWYS Prev Next {{{browse}}} Interstate 74 is... Interstate 75 is an interstate highway in the midwest and southeastern United States. ... Interstate 76 runs from Interstate 70 in Arvada, Colorado (near Denver) to an intersection with Interstate 80 near Big Springs, Nebraska. ... Interstate 76 runs from an intersection with Interstate 71 between Seville, Ohio and Westfield Center, Ohio, about 20 miles (32 km) west of Akron, to an intersection with I-295 near Camden, New Jersey. ... Interstate 77 is an interstate highway in the eastern United States. ... Interstate 78 is an interstate highway in the eastern United States. ... Interstate 79 is an interstate highway in the eastern United States. ... MAJOR JUNCTIONS JUNCTION EXIT # US-101 CA 0 20px I-880 CA ? I-580 CA ? CA ? I-680 CA ? I-780 CA ? I-505 CA ? I-5 CA ? California/Nevada State Line CA ?/NV ? I-580 NV ? Nevada/Utah State Line NV ?/UT ? I-215 UT ? I-505 UT ? UT... I-81 looking southbound near mile 245, Harrisonburg, Virginia. ... Interstate 82 is an interstate highway in the northwestern United States. ... Interstate 83 is an interstate highway in the eastern United States. ... Columbia River Gorge and I-84 as seen from Crown Point, Oregon Interstate 84 runs from an intersection with Interstate 5 at Portland, Oregon (Map) to an intersection with Interstate 80 (Map) at Echo, Utah—roughly the same route as the Oregon Trail. ... MAJOR JUNCTIONS JUNCTION MILEPOST I-81 PA 0 I-380 PA 4 I-86 NY 19 (4) I-87 NY 36 (7) I-684 NY 68 (20) I-691 CT 41 (27) I-91 CT 62 (51&52) I-384 CT 66 (59) I-291 CT 68 (61) I-90... Interstate 85 is an interstate highway in the southeastern United States. ... Interstate 86 is an intrastate Interstate Highway, located entirely within the state of Idaho. ... {{{type3}}} JUNCTIONS JUNCTION EXIT # I-90 PA 1 I-390 NY 146 (36) I-99 NY 169 (44) I-81 NY 245 NY (75) I-84 NY 362 (121) I-87 NY Legend BROWSE STATE HWYS Prev Next {{{browse}}} Interstate 86 runs from an intersection with Interstate 90 in Erie... Interstate 87 is a 346 mile (558 km) intrastate interstate highway located entirely within the state of New York. ... Interstate 88 is entirely within the state of Illinois. ... MAJOR JUNCTIONS JUNCTION EXIT # I-81 I-90 Legend BROWSE STATE HWYS {{{browse}}} Interstate 88 is entirely within the U.S. state of New York. ... Interstate 89 is an interstate highway in the New England portion of the United States. ... INTERSTATE JUNCTIONS JUNCTION EXIT # I-5 WA 2 I-82 WA 110 I-15 MT 219 - 227 I-94 MT 456 I-25 WY 55 I-29 SD 396 I-35 MN 159 I-94 WI 44 - 138 I-39 WI 108 - IL 17 I-94 IL 89 - 102 I... Interstate 91 is an interstate highway in the New England section of the United States. ... Interstate 93 is an interstate highway in the New England section of the United States. ... I-94 redirects here. ... Interstate 95 or (I-95) is an interstate highway that runs 1907 miles (3070 kilometers) north-south along the east coast of the United States. ... Interstate 96 is an intrastate Interstate highway entirely within the state of Michigan. ... Interstate 97 is an intrastate Interstate highway located entirely within Anne Arundel County, Maryland, United States. ... Interstate 99 (abbreviated I-99) is a part of the U.S. Interstate highway system. ... MAJOR JUNCTIONS JUNCTION EXIT # Legend BROWSE STATE HWYS CA-238 CA-239 Interstate 238 (abbreviated I-238) is a short (2. ... Interstate H-1 is an intrastate interstate highway in Hawaii, United States, on the island of Oahu. ... Interstate H-2 (also known as the Veterans Memorial Freeway) is an intrastate interstate highway located on the island of Oahu in Hawaii. ... Interstate H-3 in Halawa Valley looking towards the Koolau crest Interstate H-3 (also known as the John A. Burns Freeway) is an intrastate interstate highway located on the island of O‘ahu in the state of Hawai‘i, United States. ... There are four officially designated Interstate Highways in Alaska. ... There are four officially designated Interstate Highways in Alaska. ... There are four officially designated Interstate Highways in Alaska. ... There are four officially designated Interstate Highways in Alaska. ... There are three officially designated Interstate Highways in Puerto Rico. ... There are three officially designated Interstate Highways in Puerto Rico. ... There are three officially designated Interstate Highways in Puerto Rico. ... Primary interstates are the major interstate highways of the United States and are assigned a one or two-digit route number. ... This is a list of 3-digit Interstate Highway route designations in the United States. ... The Interstate Highway system is still being expanded. ... Some Interstate Highways are not signed, typically because the routes are already known by another name, and marking them would add to confusion. ... For the most part, the United States Interstate Highway System is a connected system, with most roads completed. ... The following two-digit United States Interstate Highways do not cross state lines. ... The American Association of State Highway and Transportation Officials (AASHTO) defines standards for Interstate Highways in their publication A Policy on Design Standards - Interstate System. ... The German and Austria autobahn sign The Swiss autobahn sign Autobahn (pronounced in IPA) is the German word for a major high-speed road confined to motor vehicles and having full control of access, similar to a motorway or freeway in English-speaking countries. ... High-capacity freeway interchange in Los Angeles, California. ... A gasoline tax (also known as a gas tax, petrol tax, fuel tax or fuel duty) is a sales tax imposed on the sale of gasoline. ... The term highway patrol can refer either to a police agency created primarily for the purpose of overseeing traffic safety compliance on a politys roads and highways, such as the California Highway Patrol, or to a detail within an existing local or regional police that primarily concerns its activity... In general, the concept of a freeway implies that all vehicles must be motorized and have a certain minimum amount of power; signs are usually posted to indicate this, either in the form of a list of disallowed vehicle types, or a minimum travel speed. ... List of articles related to roads and highways around the world. ... The mile-log system, also known as mile-based exit numbers, is used by a number of U.S. states to determine exit numbering on Interstate highways and other freeways (and occasionally expressway-quality surface roads). ... A parkway is a general designation of a type of limited-access highway in the US and Canada. ... A ramp meter or metering light is a device, usually a basic traffic light or a two-phase (red and green, no yellow) light, that regulates traffic entering freeways according to current traffic conditions. ... A speed limit is the maximum speed allowed by law for vehicles on a road. ... A high-speed toll booth on SR 417 near Orlando, Florida A toll gate on the Sayama bypass (Saitama prefectural road 397) in Japan A toll gate on the Dom Pedro I Highway near the city of Itatiba, Brazil A toll road, turnpike or tollpike is a road on which... Traffic lights can have several additional lights for filter turns or bus lanes. ... Current U.S. Highway shield The United States Highway System is an integrated system of roads in the United States numbered within a nationwide grid. ... The National Highway System includes many significant roads besides Interstate Highways Note: This article was adapted from public domain Federal Highway Administration web sites. ... Here is a list of major freeway and expressway systems: This list is incomplete; you can help by expanding it. ... A controlled-access highway is a step up from a limited-access highway. ...

External links

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Interstate Highway

  Results from FactBites:
 
Interstate highway - definition of Interstate highway in Encyclopedia (1715 words)
In 1974, the maximum speed limit allowed on interstate highways (along with all others in the country) was reduced to 55 mph (90 km/h) as a gasoline conservation measure in response to the 1973 energy crisis.
One potential civil defense use of the Interstate highway system is for the emergency evacuation of cities in the event of a potential nuclear war.
The Interstate shield is not to be confused with the similar-shaped green shield for a business route or loop, which gives access to and from a business district without meeting the specifications for Interstate highways.
New Georgia Encyclopedia: Interstate Highway System (695 words)
The state is served by a total of fifteen interstate highways, ranking Georgia tenth in the nation in the number of such superhighways.
In Atlanta, I-285 is the city's perimeter highway, and I-575 connects I-75 with counties in north Georgia.
I-516 is a spur highway in Savannah, and I-520 is Augusta's perimeter highway.
  More results at FactBites »

 
 

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