Three-digit interstates with an even first digit are commonly named what when they bypass traffic around major cities?

Three-digit interstates with an even first digit are commonly named what when they bypass traffic around major cities?

• A. Beltway
• B. Spur Route
• C. Toll Road
• D. Byway

Answer: (A)

Interstate numbers use a rule where the first digit of a three-digit route signals its role around a city. If that hundreds digit is even, the highway forms a loop that circles the urban area and helps bypass the center rather than ending in the city. That pattern is why such routes are commonly called a Beltway. Think of it as a ring road that keeps through traffic away from downtown. A spur route, by contrast, has an odd hundreds digit and typically branches off from a parent interstate to reach a specific destination, rather than encircling the city. Toll roads or generic byways aren’t defined by this numbering convention, so they don’t carry the Beltway idea.

Interstate numbers use a rule where the first digit of a three-digit route signals its role around a city. If that hundreds digit is even, the highway forms a loop that circles the urban area and helps bypass the center rather than ending in the city. That pattern is why such routes are commonly called a Beltway. Think of it as a ring road that keeps through traffic away from downtown. A spur route, by contrast, has an odd hundreds digit and typically branches off from a parent interstate to reach a specific destination, rather than encircling the city. Toll roads or generic byways aren’t defined by this numbering convention, so they don’t carry the Beltway idea.