The Interstate Highway System, formally the Dwight D. Eisenhower National System of Interstate and Defense Highways, is a network of controlled access highways spanning the United States, including Alaska, Hawaii and Puerto Rico. It was established by the Federal-Aid Highway Act of 1956, which provided funding for the construction of more than 40,000 miles of roads under President Eisenhower's support. The system runs to roughly 48,890 miles in length. Construction of the originally planned network was declared complete in 1992, although some stretches deviated from the 1956 plan or fell short of federal standards.
Facts
SignificanceAs of 2022, about one quarter of all vehicle miles driven in the country used the Interstate Highway System, which has a total length of 48,890 miles (78,680 km). 1 Sources
1. Interstate Highway System (Wikipedia)
Wikipedialead section, second paragraph, sentence on the 1956 Act's enactment
eventually resulting in the enactment of the Federal-Aid Highway Act of 1956.
lead section, final paragraph, sentence on system length and usage share
As of 2022, about one quarter of all vehicle miles driven in the country used the Interstate Highway System, which has a total length of 48,890 miles (78,680 km).
status sentence
The system runs to roughly 48,890 miles in length.
In Group: Transport Tunnels and Highway Networks, Introduction
The Dwight D. Eisenhower National System of Interstate and Defense Highways, commonly known as the Interstate Highway System, or the Eisenhower Interstate System, is a network of controlled-access highways that forms part of the National Highway System in the United States.
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