You may see interstate signs every day. But do you know what they really mean to you? Basically, these signs are here to guide your route and show you directions.
We have written this article to give you well researched information. You will understand interstate sign meaning, shape, color, numbering and frequently asked questions about it.
Interstate Route Sign / Highway Interstate Sign
Interstate sign is a type of traffic sign. It shows you that the road is part of the national highway system. These signs tell you about the route number and direction of travel. Actually, it guides you to reach your destination in the safest manner. Because the maximum speed limit for highway interstate signs is 55 miles per hour (90 km/h).
Interstate Sign Shape & Color
The Interstate sign has a unique shield shape, which makes it easy to spot on the road. This shine makes it different from regular rectangular or diamond-shaped signs. So, you can recognize these signs at any speed.
If we observe the color, they also have meanings. The blue background shows it is part of the national highway system. The red top band highlights major routes and the white letters and numbers display the route name clearly. Together, these colors guide you safely and help you identify the road at a glance.
Interstate Number Meanings
Interstate numbers show you which highway you are on. Two-digit numbers guide you across states. On the other hand, three-digit numbers branch from the main interstate. These numbers help you stay on the right route without any confusion.
Interstate Odd and Even Numbers
If we talk about three-digit interstates, they follow a pattern. For example, if a number starts with an even, it connects to a main interstate at both ends. This connection makes loops or bypasses.
Interstate Odd Numbers
Well, an odd-numbered three-digit interstates lead you from a main interstate to a nearby city or area from one side. Basically, they connect at only one end and take you to places off the main highway. For instance, I-195 in some states leads from a main interstate to a city.
Interstate Even Numbers
If an interstate sign starts with an even number, it connects to a main interstate at both ends. They often form city loops, bypasses plus beltways to guide you around busy areas. For example, I-465 in Indiana forms a loop around Indianapolis.
What Are Interstate Exit Signs?
Interstate exit signs inform you where to leave the highway. They guide you to cities, towns & important places like airports and hospitals.
These signs also tell you the exit number and sometimes the distance to the exit. These signs make it easier for you to plan lane changes. Therefore, you should slow down your vehicle when you see the exit sign. Actually, clear interstate exit signs reduce accidents and collisions.
What Do You Mean By North Interstate Sign?
A north interstate sign shows you that the highway is moving toward the north side. It is placed to tell you the direction of travel. So, you can plan your route in advance.
Commonly, these signs are placed at regular intervals along the interstate sign. In fact, its aim is to guide you which way you are going. Moreover, these signs are useful for long trips or unfamiliar roads.
3 Digit Interstate Numbering System
As you know, an interstate sign shows a 3-digit interstate number system. Actually, this system shows that the road is connected to a main two-digit interstate. Furthermore, the last two digits tell you about the parent interstate.
The 3-digit interstate number system is a part of the 1956 Interstate System. According to it, the first digit shows the type of route. It tells you if the road is a connector, bypass spurs or loop. Three digits help you to organize highways without mixing them with the main two-digit interstates.
Related: US Highway Numbering System – All You Need To Know
Example: If we take I-405 in California. The “4” at the start shows it is a bypass around the city. The “05” at the end shows it is connected to I-5, the main interstate. So, just by looking at the number, you can know both its type and about the parent or main highway.
US Interstate Sign
Interstate signs are mainly used in the US. In this case, the interstate sign shows that a road is part of the national highway system. In 1926, the United States Numbered Highway System was created. This system provides the first national road numbering system for cross-country travel.
These early roads were built and maintained by the states, with few national design standards. They ranged from simple two-lane roads to multi-lane freeways. After President Dwight D. Eisenhower took office in 1953. Basically, his administration proposed a national interstate system. Which led to the Federal Highway Act of 1956. This created the modern interstate network we follow today.
FAQs
Why Are Interstate Signs Green?
These signs are green because this color gives strong contrast with white text. You can read the sign easily, even from a long distance. Green is also different from red and yellow, which are used for danger and warning signs. This color standard was adopted in the 1950s to make signs clear and consistent on high-speed roads.
What Font is Used on Interstate Signs?
Interstate signs mainly use Highway Gothic, also known as the FHWA series. This font was designed in 1948 by Theodore W. Forbes to stay clear at high driving speeds. It has six styles, from series A to series F. You see this font on highways, expressways plus city streets.
Is an Interstate Sign a Regulatory Sign?
No, an Interstate sign is not a regulatory sign. It does not provide you rules like speed limits or any warning. Interstate signs are guide signs. Because they give you route numbers & directions.
What is the Detroit Interstate Sign?
The Detroit interstate sign refers to interstate route signs used around Detroit, Michigan. These signs guide you through major highways like I-75, I-94 & I-96. This highway connects Detroit to nearby cities and states.
Final Words
We tried to cover almost all aspects of the interstate sign. Always remember, this sign is used on highways in America. If you are new to the highway, then it’s good that you understood all the important details about this. Move according to the route that is mentioned on this sign. You can talk to us for getting customized road signs at factory rates.
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