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Interstates that travel through the most states: 1. I 95 (16 states), 2. I 90 (13 states), 3. I 80 (11 states), 4. I 70 (10 states), 5. I 10 (8 states) Only four state capitals are not served by an Interstate: Juneau, AK; Dover, DE; Jefferson City, MO; Pierre, SD. The only auxiliary Interstate without an existing parent Interstate: I 238 (CA)
The United States Numbered Highway System (often called U.S. Routes or U.S. Highways) is an integrated network of roads and highways numbered within a nationwide grid in the contiguous United States.
- November 11, 1926
- U.S. Highway nn (US nn), U.S. Route nn (US nn)
- 157,724 mi (253,832 km)
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What is a US Numbered Highway?
In 1926, the United States Numbered Highway System was established, creating the first national road numbering system for cross-country travel. The roads were state-funded and maintained, and there were few national standards for road design. United States Numbered Highways ranged from two-lane country roads to multi-lane freeways.
- June 29, 1956; 67 years ago
- 48,756 mi (78,465 km)
- Interstate X (I-X)
Oct 21, 2023 · This US road map displays major interstate highways, limited-access highways, and principal roads in the United States of America. It highlights all 50 states and capital cities, including the nation’s capital city of Washington, DC. Both Hawaii and Alaska are inset maps in this US road map.
These U.S. Numbered Highways were initially designated on November 11, 1926, and extend throughout the contiguous United States. There are several U.S. Highways that exist entirely within one state.
- November 11, 1926
- U.S. Highway nn (US nn), U.S. Route nn (US nn)
- 157,724 mi (253,832 km)
The Interstate System connects 46 of the 50 State capitals, as well as the Nation's Capital, Washington, D.C. The four State capitals not directly served by the Interstate System are Juneau, Alaska; Dover, Delaware; Jefferson City, Missouri; and Pierre, South Dakota.
Jul 8, 2022 · The US federal government began constructing national roads in the 1920s, with the United States Numbered Highway System created in 1926 back when there were no standards for road design.
