Instruct: Given a question, retrieve relevant passages that answer the question.
Query: What's the longest highway in America?
U.S. Highway 20 (US20) is an east–west United States highway that stretches from the Pacific Northwest all the way to New England. The "0" in its route number indicates that US20 is a coast-to-coast route. Spanning 3,365 miles (5,415km), it is the longest road in the United States,[1] and particularly from Newport, Oregon to Boston, Massachusetts, the route is roughly parallel to that of the newer Interstate 90 (I-90), which is in turn the longest Interstate Highway in the U.S. There is a discontinuity in the official designation of US20 through Yellowstone National Park, with unnumbered roads used to traverse the park.
November 9, 1904 saw the arrival of the CPR rail line. The Souris-Arcola-Regina Section branch line was the longest piece of straight track worldwide, and still has the claim of being the longest straight track of North America. Highway 33 follows along this surveyed rail line. * C.P.R – serves Stoughton, Heward, Saskatchewan, Creelman, Fillmore, Osage, Tyvan, Francis, Sedley
The Hanson brothers from Lajord developed one of the first swathers in use in Saskatchewan.
Provincial Trunk Highway 83 (PTH 83) is a major north-south highway that runs in the far western region of the Canadian province of Manitoba. It travels from the North Dakota border south of Melita, north through Virden, Birtle, Russell, and Roblin to its northern terminus with PTH 10 in the town of Swan River. Along with US 83, PTH 83 is part of the longest continuously numbered north-south highway in North America with a combined distance is .
Highway 18 is a highway in the Canadian province of Saskatchewan. It runs from Highway 13 near Robsart, approximately east of the Alberta border, to the Manitoba border near Gainsborough, where it becomes Highway 3. It passes through three major communities, all in the eastern quarter of Saskatchewan – Estevan, Oxbow, and Carnduff; it also passes north of the west and east blocks of Grasslands National Park. Highway 18 is about long, which is the longest east-west highway and second longest highway in Saskatchewan.
In the United States, each state maintains its own system of state highways. This is a list of the longest state highways in each state. , the longest state highway in the nation is Montana Highway 200, which is long. The shortest of the longest state highways is District of Columbia Route 295, which is only long.
Interstate 10 (I-10) is the major east–west Interstate Highway in the Southern United States. In the U.S. state of Texas, it runs east from Anthony, at the border with New Mexico, through El Paso, San Antonio and Houston to the border with Louisiana in Orange, Texas. At just under , the Texas segment of I-10, maintained by the Texas Department of Transportation, is the longest continuous untolled freeway in North America that is operated by a single authority. It is also the longest stretch of highway with a single designation within a single state. Mile marker 880 and its corresponding exit number in Orange, Texas, are the highest numbered mile marker and exit on any freeway in North America. After widening was completed in 2008, a portion of the highway west of Houston is now also believed to be the widest in the world, at 26 lanes. There is a wider section in China on the G4 Beijing–Hong Kong–Macau Expressway; however, that section is a toll plaza approach.
North Dakota Highway 46 (ND 46) is a road in eastern North Dakota, crossing the Red River Valley between Streeter and Oxbow. It parallels and runs about south of Interstate 94 (I-94), and is the longest stretch of straight road in North America. I-29 borders it on the east and ND 30 borders it on the west.
The longest segment connects the Brazilian city of Macapá in Amapá State to Cayenne in French Guiana, Paramaribo by the East-West Link Highway in Suriname, Georgetown in Guyana, and Boa Vista city in Roraima Brazilian State. Boa Vista is connected with all the cities in Venezuela such as Ciudad Guayana, its easternmost city. The highway supports trade among these countries. It is crossed by three large rivers, but an international system of ferries helps cross these natural obstacles.
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:
The Pan-American Highway[1] is a network of roads stretching across the American continents and measuring about 30,000 kilometres (19,000mi)[2] in total length. Except for a rainforest break of approximately 160km (100mi), called the Darién Gap, the roads link almost all of the Pacific coastal countries of the Americas in a connected highway system. According to Guinness World Records, the Pan-American Highway is the world's longest "motorable road". However, because of the Darién Gap, it is not possible to cross between South America and Central America with conventional highway vehicles. Without an all-terrain vehicle, it is necessary to circumnavigate this terrestrial stretch by sea.
It was the longest highway tunnel in Taiwan when opened to traffic in April 2005, until the top rank moved to Hsuehshan Tunnel in National Highway No. 5 in June 2006. It is now the second longest highway tunnel in Taiwan.
State Highway 16, or SH 16, is a south–north state highway that runs from Zapata on the Texas-Mexico boundary to U.S. Highway 281 24 miles (38.6 km) south of Wichita Falls. It is the longest state highway in Texas at almost 542 miles, but is only the 9th longest of any highway classification in the state. Before the 1939 renumbering, SH 4 was the longest state highway. 
At just over , SR 11 is the longest state highway in Maine, and the second longest numbered highway in the entire state (behind US 1, which runs just over in Maine). It is almost longer than Maine's longest Interstate Highway, its section of Interstate 95 (I-95). Overall, Route 11 in Maine, New Hampshire, and Vermont are long.
By the end of 1937, the Middle Road was open between Toronto and Burlington, and would soon connect with what was first known as the "Hamilton–Niagara Falls Highway". When it opened, it was the first intercity divided highway in North America
and boasted the longest continuous stretch of illumination in the world until World War II.
It soon came time to name the new highway, and an upcoming visit by King George VI and Queen Elizabeth proved to be the focal point for a dedication ceremony. On June 7, 1939, the two royal family members drove along the highway (which now connected to Niagara Falls) and passed through a light beam near the Henley Bridge in St. Catharines. This caused two Union Jacks to swing out, revealing a sign which read "The Queen Elizabeth Way".
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.
The Fraser Canyon Highway Tunnels were constructed from the spring of 1957 to 1964 as part of the Trans-Canada Highway project. There are seven tunnels in total, the shortest being about ; the longest, however, is about and is one of North America's longest. They are situated between Yale and Boston Bar.
Eyre Highway begins at the town of Norseman, on the Coolgardie–Esperance Highway. Apart from Eucla, from the South Australia border, roadhouses serving the highway are the only settlements on the stretch through Western Australia. These are located apart, at Balladonia, Caiguna, Cocklebiddy, Madura, and Mundrabilla. The section between Balladonia and Caiguna includes what is regarded as the longest straight stretch of road in Australia and one of the longest in the world. The road stretches for without turning, and is signposted and commonly known as the "90 Mile Straight". Travelling east, the highway descends through the Madura Pass just before the Madura roadhouse from the Nullarbor Plain to the coastal Roe Plains. It skirts the bottom of the escarpment, climbing back through the Eucla Pass just before Eucla.
Because of its remoteness, some widened sections of the highway serve as emergency airstrips for the Royal Flying Doctor Service. These airstrips are signposted, have runway pavement markings painted on the road, and turnaround bays for small aircraft.
Vermont Route 100 (VT 100) is a north–south state highway in Vermont in the United States. Running through the center of the state, it travels nearly the entire length of Vermont and is long. VT 100 is the state's longest state highway, the longest north-south route in Vermont, and the longest numbered highway in Vermont of any type.
Also called as Transbrasiliana Highway, as Belém-Brasília Highway or even as Bernardo Sayão Highway, the BR-153 is one of the longest highways in South America and runs in the north-south direction, connecting the city of Marabá, in the state of Pará, and the city of Aceguá, in the boundary with Uruguay. It passes through the states of Pará, Tocantins, Goiás, Minas Gerais (Triângulo Mineiro region), São Paulo, Paraná, Santa Catarina and Rio Grande do Sul. The BR-153 is one of the main highways of the central region of Brazil, mainly in the states of Goiás and Tocantins, and also in the Triângulo Mineiro region.
The following is a list of U.S. Highways in Maryland. There are currently 14 U.S. Highways that exist entirely or partially in the U.S. state of Maryland. Seven of these are primary U.S. Highways while seven are auxiliary U.S. Highways that may or may not be related to one of the primary U.S. Highways. The longest primary U.S. Highway in Maryland is U.S. Route 40 (commonly abbreviated US 40) at . The shortest primary U.S. Highway in Maryland is US 11 at . The longest auxiliary U.S. Highway in Maryland is US 301 at . The shortest auxiliary U.S. Highway in Maryland is US 522 at . All U.S. Highways are maintained by the Maryland State Highway Administration except for the portions that run through Baltimore, Hagerstown, and Cumberland. Maryland has five former U.S. Highways; those five are shaded in dark gray in the list.
At , Interstate 35 is the ninth-longest Interstate Highway following Interstate 94, and it is the third-longest north-south Interstate Highway, following Interstate 75 and Interstate 95. Even though the route is generally considered to be a border to border highway, this highway does not directly connect to either international border. I-35's southern terminus is a traffic signal in Laredo, Texas, just short of the Mexican–American border. Travelers going south can take one of two toll bridges across the Rio Grande and the Mexican border, either straight ahead into the Juarez-Lincoln International Bridge, or via Interstate 35 Business through downtown Laredo into the Gateway to the Americas International Bridge.
Known by locals as the Whittier tunnel or the Portage tunnel, the Anton Anderson Memorial Tunnel is a tunnel through Maynard Mountain. It links the Seward Highway south of Anchorage with Whittier and is the only land access to the town. It is part of the Portage Glacier Highway and at 13,300 feet (4,050 m), is the second-longest highway tunnel, and longest combined rail and highway tunnel in North America.
Later, a highway was built through Kenora in 1932, becoming part of Canada's first coast-to-coast highway in 1943, and then part of the Trans-Canada Highway, placing the community on both of Canada's major transcontinental transportation routes. The original barrier to the completion of the highway concerned the crossing of the Winnipeg River at two locations. The single span arch bridges are among the longest of their type in North America.
The Anton Anderson Memorial Tunnel, often called the Whittier Tunnel after the town at its eastern terminus, is a dual-use highway and railroad tunnel that passes under Maynard Mountain. At a length of , it is the second-longest highway tunnel and longest combined rail and highway tunnel in North America. The tunnel was upgraded to mixed use by the Kiewit Construction Company.
As traffic to Whittier increased, the shuttle became insufficient, leading to a project to convert the existing railroad tunnel into a single-lane combination highway and railway tunnel which was opened to traffic on June 7, 2000. At a length of , it is the second-longest highway tunnel and longest combined rail and highway tunnel in North America.