FAQs
Primary Interstate Highways in the 48 contiguous states. Alaska, Hawaii, and Puerto Rico also have Interstate Highways.
What four states are not served by the Interstate System? ›
The four state capitals not served by the interstate highway system are: Juneau, AK; Dover, DE; Jefferson City, MO; and Pierre, SD. In this episode, we learn another animal Sheldon does not like; hamsters.
Why is there no interstate 50 or 60? ›
However, one of the rules for Interstate numbering is that numbers are not duplicated on Interstate highways and U.S. numbered routes in the same State. Duplicate numbers would be confusing for motorists; for example, if told to take "Route 50," the motorist might follow the wrong one.
What is the least used interstate in the US? ›
What is the least traveled interstate? Interstate 180 in Illinois. It was built to connect Interstate 80 to a tiny town of 757 people called Hennepin, IL, near the Illinois River.
What is the only US state without an Interstate Highway? ›
The states that are not part of the Interstate Highway System are Alaska, Hawaii, and Puerto Rico.
What state has the least Interstate? ›
Several states are tied with only 3 routes; of these, Delaware has the fewest miles, less than 41. The fewest is 3 — a tie between Delaware, New Mexico, North Dakota, Puerto Rico, and Rhode Island. Washington, DC has the fewest miles, just 12 on 5 routes.
What is the busiest Interstate in the United States? ›
The I-5, which slices through the Los Angeles metro area, wears the crown as the busiest highway in the United States, witnessing over half a million vehicle trips daily. In the City of Angels, the I-5 is the lifeblood of regional commerce and a concrete symbol of LA's ceaseless activity.
What is the longest Interstate in the United States? ›
Interstate 90 (I-90) is an east–west transcontinental freeway and the longest Interstate Highway in the United States at 3,021 miles (4,862 km). It begins in Seattle, Washington, and travels through the Pacific Northwest, Mountain West, Great Plains, Midwest, and the Northeast, ending in Boston, Massachusetts.
What is the oldest Interstate in America? ›
When it opened on Oct. 1, 1940, the Pennsylvania Turnpike gave American motorists their first chance to experience what someday would be known as an "interstate." Pennsylvania calls the turnpike "The Granddaddy of the Pikes."
What state has no speed limit on freeway? ›
There are no states that do not have a speed limit. Montana did not have a posted daytime speed limit prior to 1974 when Nixon signed the 55mph speed limit law. The law stated that the daytime speed limit was what was reasonable and prudent.
The shortest interstate highway in the U.S. is I-375 in Detroit, Michigan. Join Eclipse DOT as we explore this unique stretch of road.
What is the oldest road in the United States? ›
Old San Antonio Road, or El Camino Real (The King's Highway) is the oldest highway in the United States. It was blazed in 1691 between the Spanish missions of Texas and Louisiana. In Texas, it was 1,000 wide and extended 539 miles from the Sabine River to the Rio Grande.
What is the most desolate road in the United States? ›
U.S. Route 50 is a transcontinental highway in the United States, stretching from the Sacramento region of California in the west to Ocean City of Maryland in the east. The Nevada portion, which goes through the center of the state, was named The Loneliest Road in America by Life magazine in July 1986.
What is the most famous interstate in the United States? ›
Route 66 became one of the most famous roads in America, having been popularized in American culture through books, songs, music, magazines, movies, and television shows.
What is the longest loneliest road in the United States? ›
One of the most notable sections of Route 50 traverses the state of Nevada, which is a primary reason for earning it the moniker of the 'Loneliest Road in America. ' Stretching across 409 miles of Nevada's vast desert terrain, Route 50 takes travellers on a journey through some of the state's most remote regions.
What's the difference between a freeway and an Interstate? ›
Freeways are a specific type of highway with no direct access from adjacent properties, no at-grade crossings, and no traffic signals. Highways can be any major road, including freeways and roads with traffic signals and direct access. Interstates are a subset of freeways and are part of a nationwide system.
What is the difference between a US route and an Interstate? ›
In general, U.S. Routes do not have a minimum design standard, unlike the later Interstate Highways, and are not usually built to freeway standards. Some stretches of U.S. Routes do meet those standards. Many are designated using the main streets of the cities and towns through which they run.
What highway goes through the entire US? ›
Interstate 80
The nearly 2,900 miles of roadway stretches from San Francisco, California, to Fort Lee, New Jersey, with Nevada, Utah, Wyoming, Nebraska, Iowa, Illinois, Indiana, Ohio and Pennsylvania in between those two points.
Is there an Interstate in California? ›
California- Interstate 80, Donnor Pass, California. California- Interchange of Golden State Freeway (I-5) and Santa Monica Freeway, (I-10). California -Orange County. I-5 and SR-22 Interchange, Santa Ana.