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This is a list of countries (or regions) by total road network size, both paved and unpaved. Also included is additional data on the length of each country or region's controlled-access highway network (also known as a motorway, expressway, freeway, etc.), designed for high vehicular traffic.
There are 71 primary Interstate Highways in the Interstate Highway System, a network of freeways in the United States. These primary highways 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 ...
Economically, interstates drive activity within the counties they pass through, but draw activity away from neighboring counties. [15] In particular, interstates tend to drive activity in the transportation and manufacturing industries, but lead to lower earnings in the agricultural, retail, and government industries. [15]
A map of the United States' Interstate Highways as of 1 October 1970. Numbered highways in the United States; List of Interstate Highways; List of United States Numbered Highways; Further information: Interstate Highway System; United States Numbered Highway System; Historic trails and roads in the United States
Shortest state highways by state State Highway mi km References Alabama: State Route 151: 0.404 0.650 [1] Alaska: Route 98: 13.4 21.6 [2] Arizona: State Route 90 Spur: 0.420 0.676 [3] Arkansas: Highway 369: 0.196 0.315 [4] California: State Route 77: 0.353 0.568 [5] Colorado: State Highway 110: 0.186 0.299 [6] Connecticut: Connecticut Route 78: ...
Maryland has 16 Interstate highways, including six primary Interstates and ten auxiliary Interstates. The longest Interstate in Maryland is Interstate 95 , while the shortest Interstate is I-295 . Maryland also contains an unsigned Interstate, I-595 ; a former Interstate, I-170 ; and an intracounty Interstate, I-97 , which is also the shortest ...
The Pershing Map FDR's hand-drawn map from 1938. The United States government's efforts to construct a national network of highways began on an ad hoc basis with the passage of the Federal Aid Road Act of 1916, which provided $75 million over a five-year period for matching funds to the states for the construction and improvement of highways. [8]
Auxiliary Interstate Highways (also called three-digit Interstate Highways) are a subset of highways within the United States' Interstate Highway System.The 323 auxiliary routes generally fall into three types: spur routes, which connect to or intersect the parent route at one end; bypasses, which connect to the parent route at both ends; and beltways, which form a circle that intersects the ...