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In addition to the 48 contiguous states, Interstate Highways are found in Hawaii, Alaska, and Puerto Rico. The Federal Highway Administration funds four routes in Alaska and three routes in Puerto Rico under the same program as the rest of the Interstate Highway System. However, these routes are not required to meet the same standards as the ...
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]
The Interstate Highway System is a federally funded and administered but state-maintained system of freeways that forms the transportation backbone of the United States, with millions of Americans relying on it for commutes, long-distance travel, and freight transport daily, among other things.
The longest Interstate Highway in Massachusetts is I-90 with 136 miles, followed by I-495 with 121 miles. Several freeway projects in the Boston area planned as part of the Interstate Highway System were cancelled in the 1970s following community opposition , including the Inner Belt (I-695) and Southwest Expressway (I-95). [ 3 ]
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 ...
There are a combined 1,673 miles (2,692 km) of Interstate Highways within New York, which handles about 19 percent of vehicle travel in New York. [2] At approximately 0.50 miles (0.80 km), I-78 is the shortest main Interstate Highway, while I-90 is the longest, spanning 385.88 miles (621.01 km) within New York.
Interstate 95 (I-95) is the main north–south Interstate Highway on the East Coast of the United States, [3] running from U.S. Route 1 (US 1) in Miami, Florida, north to the Houlton–Woodstock Border Crossing between Maine and the Canadian province of New Brunswick.
Interstate 25 (I-25), also known as the Pan-American Freeway, is a major Interstate Highway in the western United States. It is primarily a north–south highway, serving as the main route through New Mexico , Colorado , and Wyoming .
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