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The Inter-American Highway (IAH) is the Central American section of the Pan-American Highway and spans 5,470 kilometers (3,400 mi) between Nuevo Laredo, Mexico, and Panama City, Panama. History [ edit ]
The Interstate Highway System also dramatically affected American culture, contributing to cars becoming more central to the American identity. Before, driving was considered an excursion that required some amount of skill and could have some chance of unpredictability.
The National Highway System, which includes but is not limited to the Trans-Canada Highway, is the country's only official inter-provincial highway system. However, several Canadian highways are a natural extension of several key American highways that reach the Canada–US border.
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]
The National Highway System (NHS) is a network of strategic highways within the United States, including the Interstate Highway System and other roads serving major airports, ports, military bases, rail or truck terminals, railway stations, pipeline terminals and other strategic transport facilities. Altogether, it constitutes the largest ...
President Franklin D. Roosevelt saw highways as both essential to national defense and the economy, as well as a means of putting unemployed people to work. On April 14, 1941, Roosevelt appointed a National Interregional Highway Committee to study the need for a limited system of national inter-state highways. [1]
The system, as of 2010, has a total length of 47,182 miles (75,932 km), [25] making it the world's second longest after China's, and the largest public works project in US history. [26] The Interstate system joined an existing National Highway System, a designation created for the legacy highway network in 1995, comprising 160,000 miles ...
In 1925, the Joint Board on Interstate Highways, recommended by the American Association of State Highway Officials (AASHO), worked to form a national numbering system to rationalize the roads. After several meetings, a final report was approved by the U.S. Department of Agriculture in November 1925.