Corabelle Kuhlman

Corabelle Kuhlman

Modified & Updated: 24 Aug 2023


Interstate highways play a crucial role in modern transportation, connecting cities and states across the United States. These extensive networks of highways enable fast and efficient travel, contributing to the growth of commerce, tourism, and overall economic development. From the iconic Route 66 to the sprawling Interstate 80, these roadways have become an integral part of American culture and history.

In this article, we will explore 18 fascinating facts about interstate highways, shedding light on their inception, significance, and impact on society. Whether you’re a history buff, a travel enthusiast, or simply curious about the intricate web of highways that crisscross the nation, join us as we delve into the fascinating world of interstates.

Table of Contents

The Interstate Highway System is a network of highways in the United States.

Stretching over 46,000 miles, the Interstate Highway System connects cities and states, serving as a vital transportation infrastructure.

Interstate highways are identified by a blue and red shield-shaped sign.

These distinct signs make it easy to distinguish interstate highways from other roads.

The first interstate highway was opened in 1956.

This marked the beginning of a major development in the American transportation system.

The longest interstate highway is Interstate 90.

Spanning over 3,020 miles, this interstate highway stretches from Seattle, Washington to Boston, Massachusetts.

Interstate 4 is known as the deadliest interstate in the United States.

Unfortunately, this interstate has a high number of accidents and fatalities each year.

The speed limit on most interstates is 70 miles per hour.

However, it can vary from state to state, so it’s important to pay attention to the posted speed limits.

Interstate highways are designed to accommodate high traffic volumes.

Their wide lanes and multiple lanes help to alleviate congestion, especially in urban areas.

The Dwight D. Eisenhower National System of Interstate and Defense Highways is the official name for the interstate highway system.

It was named after President Dwight D. Eisenhower, who played a key role in its development.

Interstate highways have exit numbers.

This numbering system helps drivers navigate and locate specific exits along the highways.

The Interstate Highway System greatly influenced the growth of suburban areas.

Interstate highways made it easier for people to commute from suburban areas to major cities.

Interstate 5 on the West Coast stretches from Mexico to Canada.

This interstate runs along the entire length of the West Coast, passing through California, Oregon, and Washington.

Interstate highways are funded through the federal gas tax.

These funds are used for maintenance, construction, and improvement of the interstate highway system.

Interstate 285 in Georgia is known as the “Perimeter.”

It encircles the city of Atlanta and serves as a major route for traffic in the metropolitan area.

Interstate 35 is the main north-south route through the central United States.

It runs from the Mexican border in Laredo, Texas, to the Canadian border in Duluth, Minnesota.

Interstate highways have specific regulations for commercial vehicles.

Trucks and other commercial vehicles must adhere to certain guidelines, including weight limits and hours of operation.

The Federal Highway Administration oversees the interstate highway system.

They are responsible for planning, designing, and maintaining the highways.

Interstate highways connect all 48 contiguous states.

These highways make it possible for people to travel by road from coast to coast.

Interstate rest areas provide amenities for travelers.

Restrooms, picnic areas, and parking facilities are available at designated rest areas along the interstates.


In conclusion, Interstate is a fascinating network of highways that spans across the United States, connecting cities, states, and regions. It plays a crucial role in facilitating transportation, commerce, and travel, making it an integral part of the country’s infrastructure. Whether you’re embarking on a road trip, exploring new destinations, or simply commuting to work, chances are you’ll encounter one of the iconic Interstate highways. The history, construction, and significance of the Interstate system have shaped the way we navigate and perceive transportation in America. So next time you hit the road, take a moment to appreciate the marvels of the Interstate system and the impact it has on our daily lives.


1. How many miles of interstate highways are there?

There are currently over 46,000 miles of interstate highways in the United States.

2. Who is responsible for maintaining the interstate highways?

The interstate highway system is primarily maintained by the states, with federal oversight by the Federal Highway Administration.

3. Can pedestrians and cyclists use the interstate highways?

No, pedestrians and cyclists are prohibited from using interstate highways due to safety concerns.

4. Are there any tolls on the interstate highways?

Yes, there are certain sections of interstate highways that have tolls. These tolls help finance the construction and maintenance of specific segments.

5. How are exit numbers determined on the interstate highways?

Exit numbers on the interstate highways are typically based on the mile markers, with increasing numbers as you travel further along the highway.

6. Can I park my car on the interstate highways?

No, parking is not allowed on the interstate highways except in emergencies or in designated rest areas.

7. Are all of the interstate highways completely straight?

No, while many sections of the interstate highways are relatively straight, they also include curves, bends, and changes in elevation to accommodate the terrain and surroundings.

8. How many states does the interstate highway system pass through?

The interstate highway system passes through all 50 states, connecting various cities and regions across the country.