Instruct: Given a question, retrieve relevant documents that answer the question.
Query: What is the longest highway in the U.S.?
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).
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 Five former U.S. Highways exist in the state of Utah, all of which have been replaced by current interstate and U.S. Highways, with the most recent change being U.S. Route 666 redesignated as U.S. Route 491 in 2003.
Highway 180 connects at the Mexico–United States border with U.S. Route 83, one of the longest north-south U.S. Highways in the United States at . Federal Highway 180 also connects to both Interstate 69E and U.S. Route 77 at the border. U.S. Route 83 (along with both Interstate 69E and U.S. Route 77) starts the northern terminus of Highway 180 in Brownsville, Texas, at the Veterans International Bridge on the Mexican border. After crossing the bridge into the United States, Federal Highway 180 continues as U.S. Route 83 in Brownsville which then runs northward to the U.S. highway's northern terminus, north of Westhope, North Dakota, at the Canada–United States border. From here, the highway continues further as Manitoba Highway 83 until it ends at Swan River, Manitoba. In total, the three highways total in length.
The GTA also consists number of King's Highways and supplemented by municipal expressways. One of the most principal highways in the GTA, Highway 401, is also the longest in Ontario and is also one of the busiest highways in the world. Notably, a segment of the highway passing through the GTA holds the distinction of being North America's busiest highway. The GTA is laced with a number of limited-access highways, including the 400-series highways. These include:
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.
The Interstate Highways in Michigan are the segments of the national Dwight D. Eisenhower System of Interstate and Defense Highways that are owned and maintained by the U.S. state of Michigan, totaling about . The longest of these, Interstate 75 (I-75), is also the longest highway of any kind in the state. On a national level, the standards and numbering for the system are handled by the Federal Highway Administration (FHWA) and the American Association of State Highway and Transportation Officials (AASHTO), while the highways in Michigan are maintained by the Michigan Department of Transportation (MDOT) and the Mackinac Bridge Authority (MBA). The Interstates in Michigan have their origins in World War II-era expressways built in the Detroit area. After the system was created in 1956, the state highway department completed its first border-to-border Interstate in 1960. The last highway was completed in 1992, giving Michigan a total of 13 Interstate freeways. The original allotment of mileage to Michigan which would receive federal funding was expanded in 1968, and the United States Congress designated an additional highway in the 1990s that has not yet been built.
Before the creation of the Interstate Highway System after World War II, US 50 was a major east–west route. Numbered highways in the United States follow a pattern of odd numbers for north–south routes and even numbers for east–west routes, hence the designation of "50" for this route. In the preliminary report, approved by the Joint Board on Interstate Highways in late 1925, US 50 ran from Wadsworth, Nevada to Annapolis, Maryland, passing through Pueblo, Colorado; Kansas City, Missouri; Tipton, Missouri; St. Louis, Missouri; Cincinnati, Ohio, and Washington, D.C. The route did not directly replace any auto trail, instead combining portions of many into one continuous route. It followed the historic Northwestern Turnpike across West Virginia, and portions of other historic roads. Major auto trails followed, including the Midland Trail in part of Indiana, Illinois, Missouri, and parts of Utah and Colorado. The National Old Trails Road (Old Santa Fe Trail) was designated in Kansas and eastern Colorado, and the Lincoln Highway was constructed in Nevada. In most states that had numbered their state highways, US 50 followed only one or two numbers across the state.
Interstate 90 (I-90) is the longest primary Interstate Highway in Washington, which connects Seattle to Spokane and the Idaho border, measuring , while I-82, connecting the Oregon border city of Umatilla to Elensburg via Yakima, is the shortest at . The longest auxiliary Interstate Highway in Washington is I-405, a bypass of Seattle through the Eastside, at , and the shortest is I-705, a spur into downtown Tacoma, at . One route, I-605, has been proposed over the years to form another Eastside bypass, however there are no plans to construct this fifth auxiliary route.
After passage of the Federal Aid Highway Act of 1956, which formed the Interstate Highway System, the American Association of State Highway Officials had approved I-5 and I-90 across Washington on August 17, 1957. I-82 was approved on October 17, 1957, two months after I-5 and I-90, as part of a addition to the Interstate Highway System.
CanAm Highway is an international highway that connects Mexico to Canada through the United States. It travels along U.S. Route 85 (US 85) and Interstate 25 (I-25), passing through six U.S. states (Texas, New Mexico, Colorado, Wyoming, South Dakota, North Dakota) and the Canadian province of Saskatchewan. The CanAm highway in Canada comprises Saskatchewan Highway 35 (SK 35), SK 39, SK 6, SK 3, and SK 2. The route continues south in Mexico as Mexican Federal Highway 45 (Fed. 45), and north in Canada as SK 102 but are not labeled the CanAm highway.
State Route 11 (SR 11) is a state highway in the U.S. state of Georgia, traveling through portions of Echols, Lanier, Berrien, Irwin, Ben Hill, Wilcox, Pulaski, Houston, Peach, Bibb, Jones, Jasper, Newton, Walton, Barrow, Jackson, Hall, White, Lumpkin, and Union counties. It travels the entire length of the state from south to north, connecting the Florida state line with the North Carolina state line, roughly bisecting the state into two equal parts. It travels through Warner Robins, Macon, and Gainesville It is the longest route in the state. The portion from the southeastern city limits of Monticello to the Jasper–Newton county line is included in the Monticello Crossroads Scenic Byway.
The of railway between Valdosta and Waycross were once the longest straight stretch of railroad in the world. Today highways stretch through the county for miles with hardly a curve, rise, or fall.
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.
I-80 is the Interstate Highway that most closely approximates the route of the historic Lincoln Highway, the first road across the United States. The highway roughly traces other historically significant travel routes in the Western United States: the Oregon Trail across Wyoming and Nebraska, the California Trail across most of Nevada and California, the first transcontinental airmail route, and except in the Great Salt Lake area, the entire route of the First Transcontinental Railroad. From near Chicago east to near Youngstown, Ohio, I-80 is a toll road, containing the majority of both the Indiana Toll Road and the Ohio Turnpike. I-80 runs concurrently with I-90 from near Portage, Indiana, to Elyria, Ohio. In Pennsylvania, I-80 is known as the Keystone Shortway, a non-tolled freeway that crosses rural north-central portions of the state on the way to New Jersey and New York City.
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.
As a former US Highway, the route passes through many historic districts and has many junctions. The route begins at US 65B/US 79B (the Martha Mitchell Expressway) in northwest Pine Bluff near the University of Arkansas at Pine Bluff and runs northwest. Highway 365 is known as Dollarway Road in this part of Pine Bluff as it follows the original routing of the Dollarway Road, a 1913 paving project that gave Jefferson County the longest continuous concrete road in the nation at the time. Highway 365 meets its spur route further northwest, the spur connects Highway 365 to Interstate 530/US 65 and US 270. Now entering White Hall, Highway 365 passes the historic Bellingrath House and intersects Highway 256 near the Pine Bluff Arsenal.
Highway 3 is a major provincial paved undivided highway in the Canadian province of Saskatchewan. It runs from the Alberta border, where it continues west as Alberta Highway 45, to the Manitoba border, and then continues east as Highway 77. Highway 3 is about 615 km (382 mi.) long. The CanAm Highway comprises Saskatchewan Highways 35, 39, 6, 2, as well as 2. of Saskatchewan Highway 3 contribute to the CanAm Highway between Melfort and Prince Albert.
As of August 2016, the U.S. portion of the highway is paved from the Taylor Highway junction almost as far as Chicken, Alaska, and again for the final 10 kilometers from the Eagle turnoff to the Canada–United States border. Most of the Canadian portion is unpaved. The paved Canadian sections are from kilometer 0 (at Dawson) to km 9 (mile 0 to mi 5.4), km 74 to 76 (mi 46.0 to 47.2), km 79 to 82 (mi 49.1 to 51.0), km 83 to 94 (mi 51.6 to 58.4) and km 99 to 104 (mi 61.5 to 64.6) at the Canada–US border.
Montana Highway 200 (MT 200) in the U.S. state of Montana is a route running east-west covering the entire state of Montana. From the starting point at ID 200, near Heron, Montana the highway runs east to ND 200 near Fairview, Montana. It is part of a chain of state highways numbered "200" which extend from Idaho across Montana, North Dakota and Minnesota. Montana Highway 200 is also the longest route signed as a state highway in the United States.
Highway 200 helps to connect many small towns located in central Montana and the vast plains area of eastern Montana, to larger western Montana cities such as Great Falls and Missoula.
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).
I-75 is the longest Interstate Highway within Georgia. It enters near Valdosta, and it continues northward through the towns of Tifton and Cordele until it reaches the Macon area, where it intersects with I-16 eastbound towards Savannah. For northbound traffic wishing to avoid potential congestion in Macon, I-475 provides a relatively straight bypass west of that city and I-75's route.
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.
U.S. Route 6 travels east–west near the north edge of the U.S. state of Pennsylvania from the Ohio state line near Pymatuning Reservoir east to the Mid-Delaware Bridge over the Delaware River into Port Jervis, New York. It is the longest highway segment in the Commonwealth. Most of it is a two-lane rural highway, with some freeway bypasses around larger towns. Except east of Dunmore, where it is paralleled by Interstate 84, it is the main route in its corridor. What is now Interstate 80—the Keystone Shortway—was once planned along the US 6 corridor as a western extension of I-84. The corridor was originally the Roosevelt Highway from Erie, Pennsylvania to Port Jervis, New York, designated Pennsylvania Route 7 in 1924. The PA 7 designation soon disappeared, but as US 6 was extended and relocated, the Roosevelt Highway followed it. The Pennsylvania section of US 6 was renamed the Grand Army of the Republic Highway in 1946; this name was applied to its full transcontinental length by 1953.
U.S. Route 6 (US 6), also called the Grand Army of the Republic Highway, honoring the American Civil War veterans association, is a main route of the U.S. Highway system. While it currently runs east-northeast from Bishop, California to Provincetown, Massachusetts, the route has been modified several times. The highway's longest-lasting routing, from 1936 to 1964, had its western terminus at Long Beach, California. During this time, US 6 was the longest highway in the country.
Unlike most Interstate Highways, much of I-70 in Utah was not constructed parallel to or on top of an existing U.S. Highway. Portions of I-70 were constructed in areas where previously there were no paved roads. Because it was built over an entirely new route, I-70 has many features that are unique in the Interstate Highway System. For example, the between Green River and Salina makes up the longest distance anywhere in the Interstate Highway System with no motorist services. This same piece is noted as the longest highway in the United States built over a completely new route since the Alaska Highway, and the longest piece of Interstate Highway to open at a given time. The construction of the Utah portion of I-70 is listed as one of the engineering marvels of the Interstate Highway System.
U.S. Route 30 (US 30) is an east–west main route of the system of United States Numbered Highways, with the highway traveling across the northern tier of the country. It is the third longest U.S. route, after U.S. Route 20 and U.S. Route 6. The western end of the highway is at Astoria, Oregon; the eastern end is in Atlantic City, New Jersey. Despite long stretches of parallel and concurrent Interstate Highways, it has not been decommissioned unlike other long haul routes such as U.S. Route 66.