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In 1926, the United States Numbered Highway System was established, creating the first national road numbering system for cross-country travel. The roads were funded and maintained by U.S. states, and there were few national standards for road design. United States Numbered Highways ranged from two-lane country roads to multi-lane freeways.
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, even-numbered Interstates run east–west, with lower ...
People doing business along the route became prosperous, and they later fought to keep it alive in the face of the growing threat of being bypassed by the more advanced controlled-access highways of the Interstate Highway System in the 1960s and 1970s. US 66 underwent many improvements and realignments over its lifetime, but it was officially ...
After getting feedback from the states, they made several modifications; the U.S. Highway System was approved on November 11, 1926. Expansion of the U.S. Highway System continued until 1956, when the Interstate Highway System was laid out and began construction under the administration of President Dwight D. Eisenhower. After the national ...
In the 1950s, however, the United States renewed building a network of high-capacity, high-speed highways to link its vast territory. The most important element is the Interstate Highway system, first commissioned in the 1950s by President Dwight D. Eisenhower and modeled partly after the Italian autostrada and the German Autobahn system.
With an original authorization of $25 billion (equivalent to $215 billion in 2023) [1] for the construction of 41,000 miles (66,000 km) of the Interstate Highway System over a 10-year period, it was the largest public works project in American history through that time. [2]
Construction of the U.S. Interstate Highway System tore through the nation's urban areas with freeways that, through intention and indifference, carved up Black communities
The following list contains the most notable road interchanges within the United States divided by each state, which are mainly part of the national Interstate Highway System and are all freeways intersecting with each other at a junction.