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The first cloverleaf interchange patented in the US was by Arthur Hale, a civil engineer in Maryland, on February 29, 1916. [3] [4]A modified cloverleaf, with the adjacent ramps joined into a single two-way road, was planned in 1927 for the interchange between Lake Shore Drive and Irving Park Road in Chicago, Illinois, but a diamond interchange was built instead.
The United States Numbered Highway System (often called U.S. Routes or U.S. Highways) is an integrated network of roads and highways numbered within a nationwide grid in the contiguous United States. As the designation and numbering of these highways were coordinated among the states, they are sometimes called Federal Highways, but the roadways ...
Highway shields for Interstate 80, Business Loop Interstate 80, and the Eisenhower Interstate System Primary Interstate Highways in the 48 contiguous states. Alaska, Hawaii, and Puerto Rico also have Interstate Highways. System information Length 48,756 mi [a] (78,465 km) Formed June 29, 1956 ; 68 years ago (1956-06-29) Highway names Interstates Interstate X (I-X) System links Interstate ...
An arterial road or arterial thoroughfare is a road without controlled access that can carry a large volume of local traffic at a generally high speed, being below controlled-access highways in the hierarchy. Because their primary function is to connect collector roads (below) to controlled-access highways, some are considered limited-access roads.
In the United States, speed limits are set by each state or territory. States have also allowed counties and municipalities to enact typically lower limits. Highway speed limits can range from an urban low of 25 mph (40 km/h) to a rural high of 85 mph (137 km/h). Speed limits are typically posted in increments of five miles per hour (8 km/h).
The LRT Line 2 follows the route of R-6 from Legarda Street in Sampaloc, Manila to Marcos Highway in between the boundaries of Santolan, Pasig and Calumpang, Marikina. The road spans 88.6 kilometers (55.1 mi) long. Radial Road 7 starts from Sampaloc, Manila. The road follows a direct route towards Quezon City.
The Autobahn ( IPA: [ˈaʊtoˌbaːn] ⓘ; German plural Autobahnen, pronounced [ˈaʊ̯toˌbaːnən] ⓘ) is the federal controlled-access highway system in Germany. The official German term is Bundesautobahn (abbreviated BAB ), which translates as 'federal motorway'. The literal meaning of the word Bundesautobahn is 'Federal Auto (mobile) Track'.
New South Wales. Road routes in New South Wales assist drivers navigating roads in urban, rural, and scenic areas of the state. Today all numbered routes in the state are allocated a letter (M, A, B or D) in addition to a one- or -two digit number, with 'M' routes denoting motorways, 'A' routes denoting routes of national significance, 'B' routes denoting routes of state significance, and 'D ...