What is Interstate Sign? Quiz, Meaning, Definition, Example, Shape, Location, Color

What is Interstate Sign? Quiz, Meaning, Definition, Example, Shape, Location, Color. Learn about the importance of Interstate signs in the USA, including their meaning, definition, and unique design. Find out how these distinctive shield-shaped signs help guide drivers through the extensive Interstate Highway System for efficient long-distance travel.

Interstate Sign

The Interstate sign is a shield-shaped sign with a blue background, red, white, and blue shield emblem, and white route numbers, strategically placed along the Interstate Highway System. Its purpose is to help drivers identify specific routes within the system, facilitating efficient navigation and long-distance travel across the United States.

Interstate Sign


The Interstate sign is used to identify and designate specific routes within the Interstate Highway System. It helps drivers navigate the extensive network of controlled-access highways that connect major cities and regions across the United States.


An Interstate sign is a traffic control device that displays the unique route number assigned to a specific segment of the Interstate Highway System. These signs assist drivers in finding their way through the system, understanding exit and entrance points, and identifying specific routes for long-distance travel.


Example 1: Imagine you are driving from New York City to Washington D.C. for the first time. As you enter the Interstate Highway System, you will see Interstate signs with “I-95” displayed on them. These signs inform you that you are on the correct route, which connects New York City and Washington D.C. By following the I-95 signs, you can easily navigate the highway system without getting lost.

Example 2: Suppose you’re taking a family road trip from Chicago to Orlando. To ensure a smooth journey, you will rely on Interstate signs to guide you along the way. As you travel, you’ll see signs for “I-65” and later “I-75,” indicating the specific routes within the Interstate Highway System that connect Chicago and Orlando. By following these signs, you’ll be able to reach your destination without any confusion.

Example 3: If you are driving from Los Angeles to San Francisco, you would follow the Interstate signs displaying “I-5” to stay on the correct route. These signs help you easily navigate the highway system, even if you are unfamiliar with the area. By following the I-5 signs, you can confidently travel between the two cities and enjoy a stress-free driving experience.

Interstate Sign Example


The Interstate sign in the USA has a unique shield shape, which is easily recognizable by drivers. The shield shape is specifically associated with the Interstate Highway System and distinguishes it from other types of route signs.


Interstate signs are placed at various points along the Interstate Highway System, including overhead gantries, roadside signposts, and entrance and exit ramps. They are also frequently used in conjunction with other directional signs to provide drivers with clear guidance on how to navigate the highway system.

Interstate Sign location


The Interstate sign features a blue background with a red, white, and blue shield emblem at the top. The route number is displayed in large, white numbers, providing a clear contrast against the blue background for enhanced readability. The red, white, and blue colors are a nod to the national colors of the United States, emphasizing the significance of the Interstate Highway System as a nationwide network.


Knowledge Test
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Interstate Sign

Interstate Sign
Type: Multiple-Choice Questions
Total Items: 15
Passing Marks: 80%
Time Limit: N/A

1 / 15

If a driver is traveling on I-5 North and encounters an Interstate sign with an exit number for their intended destination, but they are in the far-left lane, what is the safest course of action?

2 / 15

While traveling on a two-lane Interstate highway, a driver sees an Interstate sign indicating that the left lane is designated for "Passing Only." What should the driver do if they are not passing another vehicle?

3 / 15

If a driver encounters an Interstate sign displaying "I-40 East" while driving from Nashville, TN, to Raleigh, NC, what should they do?

4 / 15

What should a driver do when approaching an Interstate sign indicating an exit number they need to take?

5 / 15

Which of the following is NOT a responsibility of drivers when navigating the Interstate Highway System?

6 / 15

When planning a long-distance trip using the Interstate Highway System, what should a driver do to ensure a smooth journey?

7 / 15

If a driver encounters an Interstate sign indicating "I-90 West," what should they understand about their current route?

8 / 15

What legal consequence might a driver face for not obeying Interstate signs and traffic regulations?

9 / 15

Where are Interstate signs typically placed on the road?

10 / 15

What is the primary purpose of exit numbers on Interstate highways?

11 / 15

What information can be found on an Interstate sign besides the route number?

12 / 15

In which of the following situations would you expect to see an Interstate sign?

13 / 15

What are the colors used on an Interstate sign?

14 / 15

What is the shape of an Interstate sign?

15 / 15

What is the primary purpose of an Interstate sign in the USA?

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The average score is 87%

Important points to remember

When using the Interstate Highway System, keep these important points in mind for a safe and efficient driving experience:

  1. Recognize Interstate signs: Familiarize yourself with the unique shield shape and blue color of Interstate signs to quickly identify specific routes within the system.
  2. Pay attention to route numbers: The large white numbers on Interstate signs indicate the route number you are currently on or approaching. Make sure to follow the correct route number to reach your destination.
  3. Look for additional information: Interstate signs often include directional information, such as North, South, East, or West, to help drivers navigate the highway system more effectively. Be aware of these indications and follow them as needed.
  4. Use exit numbers: Exit numbers on Interstate highways are essential for navigating to your desired destination. Pay attention to the exit numbers on signs as you approach them and plan accordingly to avoid missing your exit.
  5. Observe speed limits: The Interstate Highway System often has higher speed limits than other roads. Be aware of the speed limits on the specific route you are traveling and adjust your speed accordingly.

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