15 Longest Highways in the USA in 2024

Highways are essential transportation routes that link cities and regions across the country. Highways in the United States serve an important role in supporting trade by allowing the movement of goods and services that drive the economy. 

They also provide crucial access to personal travel and help people find work, education, and leisure opportunities. Highways enhance mobility, efficiency, and economic growth, making them a critical component of the nation’s infrastructure.

Overall, highways act as a lifeline, promoting connection and facilitating the interchange of ideas, goods, and culture in America and around the world.

So, let’s travel down the Longest Highways in the USA, discovering its length, history, and the surprises it holds along the route. This blog takes you from the busy streets of big cities to the peace of rural areas, providing an insight into America’s heart. 

List of 15 Longest Highways in the USA

Here is the list of 15 Longest Highways in the USA:

• US-20: 3,365 miles
• US-6: 3,227 miles
• US-30: 3,073 miles
• I-90: 3,020.44 miles
• US-50: 3,007 miles
• I-80: 2,899.59 miles
• US-2: 2,643 miles
• US-1: 2,593 miles
• I-40: 2,556.61 miles
• I-10: 2,460.34 miles
• US-64: 2,326 miles
• I-70: 2,150.57 miles
• US-52: 2,072 miles
• I-95: 1,919.31 miles
• I-75: 1,786.47 miles

1. US-20: 3,365 miles

U.S. Highway 20, a whopping 3,365-mile highway, stretches from the historic city of Boston all the way to the scenic Oregon coast. It’s not just long, it’s important. This highway acts as a major route, carrying people and goods across the country. Big cities like Chicago and Boise benefit a lot from this route. 

But it’s not all business. US-20 also winds through some real eye candy. Cruise past the wonders of Yellowstone National Park or feel the ocean breeze on your face as you follow the Oregon Coast. No wonder it’s a favorite for road trips!

And let’s not forget the local folks. This highway is their lifeline, connecting them to hospitals, schools, and the necessities of everyday life. So next time you’re cruising down US-20, remember you’re not just on a road trip, you’re part of something bigger.

2. US-6: 3,227 miles

U.S. Highway 6, a 3,227-mile highway, takes you on a journey across America’s heartland, from the charming Provincetown on the East Coast to sunny Bishop on the West.

This isn’t just any highway; it’s a connector. It threads its way through fourteen states, connecting together bustling towns and quiet rural communities. No matter if you’re a local resident or just passing through, US-6 is your key to getting where you need to go.

Nicknamed the “Grand Army of the Republic Highway,” it carries the weight of history, dating back to the Civil War era. But US-6 isn’t stuck in the past. Today, it’s a lifeline for countless communities, ensuring they have access to the essentials – jobs, schools, and the things that keep life going. So, the next time you see a sign for US-6, you’re not just looking at a road, you’re looking at a piece of American history and a vital part of the country’s present.

3. US-30: 3,073 miles

US Highway 30, a 3,000-mile highway, can make that dream a reality! Stretching from the glitzy casinos of Atlantic City on the East Coast to the charming port town of Astoria on the West Coast, US-30 is more than just a scenic route.

This highway is a lifeline for countless towns and cities along the way. Imagine cruising through bustling streets and stopping in quiet communities, all connected by this historic road.  US-30 isn’t just about getting from point A to point B; it’s about access. Whether you need to reach a hospital, school, or your favorite local diner, US-30 has you covered.

But US-30 boasts more than just practicality. Nicknamed the “Lincoln Highway,” this road is steeped in history. It was one of the first highways to connect the east and west coasts, playing a pivotal role in the settlement and growth of the American West. So, the next time you see a US-30 sign, remember you’re not just on a road trip, you’re tracing the footsteps of history!

4. I-90: 3,020.44 miles

Interstate 90, or I-90 for short, stretches an impressive 3,020 miles, connecting Seattle’s bustling harbor to Boston’s rich history. But it’s more than just long, it’s a major route for the country.

It carries people on journeys of business and pleasure, while also transporting tons of goods to keep America running. Big cities like Chicago and Cleveland thrive with life thanks in part to the easy access I-90 provides.

I-90 also acts as a lifeline for countless industries, from the towering smokestacks of factories to the golden fields of farms. It connects rural communities to the wider world, promoting growth and prosperity. So, the next time you see a sign for I-90, remember, you’re not just on a road, you’re on a route that keeps America moving.

5. US-50: 3,007 miles

Ever dream of a cross-country adventure with wide-open spaces and epic scenery? Then look no further than U.S. Highway 50, a 3,007-mile highway that treks from the charming shores of Ocean City on the East Coast to vibrant West Sacramento on the West.

Nicknamed the “Loneliest Road in America,” US-50 might show images of isolation, but don’t be fooled! This highway is a connector. It goes through diverse landscapes, treating you to majestic mountain ranges, huge deserts, and everything in between. It’s a chance to truly experience the vastness of the United States.

While it may be remote in some stretches, US-50 is anything but lonely. It’s a vital route for businesses moving goods across the country and tourists seeking a unique adventure.  So, if you’re looking for a road trip with a difference, US-50 awaits! Just be sure to pack your sense of adventure and a good playlist, because the scenery might leave you speechless.

6. I-80: 2,899.59 miles

East Coast to West Coast, I-80 has got you covered! This interstate highway, clocking in at nearly 2,900 miles, stretches all the way from the iconic Golden Gate Bridge in San Francisco to the bustling New York City area in Teaneck, New Jersey.

But I-80 is much more than a scenic route. It’s a lifeline for the nation’s economy. The highway carries goods and services across the country. From freshly harvested crops to manufactured products, I-80 keeps America’s commerce humming.

I-80 connects people too. Families traveling for vacations, business professionals on important meetings, all rely on this highway to get where they need to go. It’s a route that fosters connection and opportunity between the East and West Coasts.

So the next time you see a sign for I-80, remember, you’re not just on a road, you’re on a major connection that keeps America’s economy and people moving.

7. US-2: 2,643 miles

U.S. Highway 2, a 1,500-mile highway, winds its way from the scenic port city of Everett, Washington, all the way to St. Ignace, Michigan, on the shores of the Great Lakes.

This highway isn’t just long, it’s a vital connection for countless towns and cities nestled across America’s north. Whether you’re cruising through bustling streets or stopping in charming villages, US-2 keeps things moving. It’s like a main street for a big chunk of the country!

Nicknamed the “Great Northern Highway,” US-2 lives up to its name. You’ll journey through majestic mountains, lush forests, and wide-open grasslands. It’s a road trip through a postcard come to life! But US-2 is more than just scenic views. It’s a lifeline for many communities, providing access to essential services like hospitals and schools, job opportunities, and even recreational areas. 

8. US-1: 2,593 miles

Get ready for a classic American road trip – US Highway 1! Stretching 2,593 miles, this highway runs along the entire East Coast, from the sunshine-soaked shores of Key West, Florida to the charming town of Fort Kent, Maine.

US-1 is more than just a scenic route; it’s a lifeline for countless coastal communities. It connects vibrant cities, sweet towns, and hidden beaches.  Whether you need to get to work or explore a new harbor, US-1 has you covered.

Also known as the “Atlantic Highway” or the “East Coast Highway,” US-1 lives up to its names. Think sparkling beaches, charming harbors, and historic landmarks lining the road – a picture-perfect coastal drive! It’s no wonder this route is a favorite among tourists.  As you cruise down US-1, you can soak up diverse landscapes, from sandy shores to bustling cities, and discover different cultural attractions. 

9. I-40: 2,556.61 miles

Hitting the road from coast to coast? Then you might be cruising down I-40, a 2,500-mile monster that stretches from sunny Barstow, California all the way to historic Wilmington, North Carolina. But I-40 is much more than a scenic drive.

This interstate is a key connector, making its way through cities, towns, and rural areas. It’s an important route for people on business trips, families on vacations, and everything in between.  No matter where you’re headed on I-40, you’re sure to find easy access to important services and industries. Need to fuel up your car or grab a bite to eat? No problem.  

I-40 also acts as a lifeline for businesses along the route, from farms and factories to hotels and restaurants. It helps move goods and services, which keeps the economy humming and communities thriving. 

10. I-10: 2,460.34 miles

Interstate 10, or I-10 for short, stretches a whopping 2,460 miles, connecting sunny Santa Monica, California on the West Coast to Jacksonville, Florida on the East Coast. It’s more than just a scenic route; it’s a southern lifeline.

It connects major cities and towns, keeping commerce and travel flowing.  Need to get to work in Houston or explore the sights in New Orleans? I-10 gets you there. But it’s not just about people on the move. This interstate is also crucial for businesses.  Factories, farms, and tourist attractions all rely on I-10 to move goods and supplies. By connecting these businesses to a wider market, I-10 fuels regional growth and prosperity. 

11. US-64: 2,326 miles

U.S. Highway 64, stretches from the sandy shores of Nags Head, North Carolina, all the way to the landscapes near the Four Corners in Arizona.

This highway is more than just a scenic route; it’s a connector. It makes its way through countless towns, cities, and rural areas, acting as a vital artery for the nation’s transportation network.  Imagine it as a ribbon tying together communities across the country. Whether you’re a trucker hauling goods or a family on a road trip, US-64 gets you where you need to go.

But US-64 isn’t just about getting from point A to point B. It’s a route that fosters economic progress.  Easy access to industries, services, and attractions along the way allows businesses to flourish and communities to thrive.  Think of it as a lifeline for local economies, pumping in resources and keeping things moving.

12. I-70: 2,150.57 miles

Interstate 70, or I-70 as it’s often called, stretches an impressive 2,150 miles, connecting the historic city of Baltimore, Maryland on the East Coast to the dramatic landscapes of Cove Fort, Utah in the West. 

It winds its way through countless cities, towns, and rural areas, acting as a vital corridor for commerce and travel.  Hauling goods across state lines or on a family road trip? I-70 gets you there.

The benefits of I-70 go beyond just getting from point A to point B.  Easy access to industries, services, and attractions along the route fuels economic activity. Think of it as a lifeline for businesses and communities, keeping them connected and thriving.

13. US-52: 2,072 miles

Ready for a north-south adventure unlike any other? Get ready for US Highway 52, a 3,335-kilometer highway that stretches from the Canadian border near Portal, North Dakota, all the way down to the historic city of Charleston, South Carolina, on the Atlantic Coast. 

It’s a lifeline for both business and leisure travelers. Whether you’re a trucker hauling goods or a family on a road trip, US-52 gets you where you need to go, while also providing access to all sorts of interesting stops along the way. Think gas stations with friendly faces, local diners serving up delicious meals, and hidden gem attractions waiting to be discovered.

As you travel this route, you’ll witness a stunning display of America’s natural beauty and cultural heritage. From the vast plains of the Midwest to the rolling hills and charm of the Southern states, US-52 offers a front-row seat to the country’s diverse landscapes. It’s a road trip through time and geography!

And let’s not forget the communities that US-52 keeps connected to. For many towns, this highway is their lifeline. It provides essential services like hospitals and schools, connects them to job opportunities, and opens doors to recreational activities. 

14. I-95: 1,919.31 miles

Up and down the East Coast, I-95, a 2,000-mile highway, is your key to adventure!  It stretches from the sunshine of Miami, Florida all the way to Houlton, Maine near the Canadian border.

I-95 keeps people and goods moving, with state transportation departments constantly working to keep it safe and efficient for millions of drivers every year.  Need a pitstop? No problem! Modern rest areas, service stations, and even electronic toll systems make cruising up and down the coast a breeze.

Because of its length and location, it’s a vital economic corridor. Businesses along the route thrive thanks to the easy access this interstate provides.  

15. I-75: 1,786.47 miles

Calling all road warriors and sunshine seekers! Get ready for a north-south adventure on I-75, a 1,786-kilometer highway that stretches from the Canadian border near Sault Ste. Marie, Michigan, all the way down to sunny Hialeah, Florida, near Miami. 

Imagine I-75 as a superhighway, connecting major cities and towns along the way.  Whether you’re a trucker hauling goods or a family on a road trip, I-75 gets you where you need to go. It also provides easy access to all sorts of interesting stops – think local businesses, hidden gem attractions, and rest areas with friendly faces.

Don’t worry about outdated infrastructure either. State transportation departments are constantly working to keep I-75 safe and efficient for millions of drivers each year.  Modern amenities like restrooms, service areas, and even electronic toll systems make cruising up and down this route a breeze.

A Table Comparison of Longest Highways in the USA

Rank	Highway Name	Length (miles)	Route Description
1.	US-20	3,365	Connects Boston, Massachusetts, to Newport, Oregon. Passes through major cities like Chicago, Illinois, and Boise, Idaho.
2.	US-6	3,227	Spans from Provincetown, Massachusetts, to Bishop, California. Connects communities in 14 states.
3.	US-30	3,073	Links Atlantic City, New Jersey, to Astoria, Oregon.
4.	I-90	3,020.44	Connects Seattle, Washington, to Boston, Massachusetts.
5.	US-50	3,007	Connects Ocean City, Maryland, to West Sacramento, California.
6.	I-80	2,899.59	Spans from San Francisco, California, to Teaneck, New Jersey.
7.	US-2	2,643	Links Everett, Washington, to St. Ignace, Michigan.
8.	US-1	2,593	Connects Key West, Florida, to Fort Kent, Maine.
9.	I-40	2,556.61	Connects Barstow, California, to Wilmington, North Carolina.
10.	I-10	2,460.34	Spans from Santa Monica, California, to Jacksonville, Florida.
11.	US-64	2,326	Connects Nags Head, North Carolina, to Teec Nos Pos, Arizona.
12.	I-70	2,150.57	Links Cove Fort, Utah, to Baltimore, Maryland.
13.	US-52	2,072	Spans from Portal, North Dakota, to Charleston, South Carolina.
14.	I-95	1,919.31	Connects Miami, Florida, to Houlton, Maine.
15.	I-75	1,786.47	Extends from Sault Ste. Marie, Michigan, to Hialeah, Florida.

Conclusion

So, these were the Longest Highways in the USA. From the well-known Interstate 90 that runs coast to coast to the beautiful US Highway 1 along the eastern seaboard, these highways form the backbone of America’s transportation network. They provide important routes for business and personal travel, allowing visitors to see the varied landscapes and cultures that make up this great country.

FAQs

What Are the World’s 5 Longest Highways?

Here are the five longest highways in the world:

1. Pan-American Highway (multiple countries): Stretching from Prudhoe Bay, Alaska to Ushuaia, Argentina, the Pan-American Highway is the world’s longest drivable road. With a total length of approximately 30,000 kilometers (19,000 mi), it traverses 14 countries in North, Central, and South America. 

2. Highway 1 (Australia): Highway 1 is Australia’s longest national highway network, with a total length of 14,500 kilometers (9,000 mi). 

3. Trans-Siberian Highway (Russia): The Trans-Siberian Highway is a network of highways that spans Russia from west to east. It stretches for 11,000 kilometers (6,800 mi) from St. Petersburg on the Baltic Sea to Vladivostok on the Sea of Japan. This highway is one of the longest routes entirely within a single country. 

4. Asian Highway 6 (Asia and Europe): Asian Highway 6, also known as the AH6, is a network of highways that connects Europe and Asia. It has a total length of 10,533 kilometers (6,545 mi) and runs from Gdańsk, Poland to Bandar Abbas, Iran. This highway route passes through several countries, including Kazakhstan, Kyrgyzstan, and China. 

5. Asian Highway 2 (Indonesia to Iran): With a total length of 13,107 kilometers (8,144 mi), Asian Highway 2 (AH2) is a route that connects Indonesia to Iran. It travels through several Southeast Asian countries and then through India, Pakistan, and Iran. 

What Is the Most Commonly Used Interstate in the United States?

The most used interstate in the United States is I-95, which is 1,917 miles long and runs across 15 states, from Maine to Miami, Florida. Keep in mind that it passes through D.C. congestion, Philadelphia, New York, and Boston.

Which U.S. State Has the Most Highways?

Texas has the highest highway mileage in the United States. Texas leads the way with a massive 686,533 lane miles of road.

Which Is the Longest Highway in Pakistan?

The N-5, also known as National Highway 5, is an 1819-kilometer-long road in Pakistan. It is the longest national highway, stretching from Karachi in Sindh to Torkham in Khyber Pakhtunkhwa. 

What Is the Longest Highway in Asia?

Asian Highway 1 (AH1) is the longest route in the Asian Highway Network, stretching 20,557 kilometers (12,774 miles) from Tokyo, Japan, through Korea, China, Southeast Asia, Bangladesh, India, Pakistan, and Iran to the border between Turkey and Bulgaria west of Istanbul, where it intersects with European Route E80 and continues all the way to Lisbon, Portugal.