Three-digit interstates with an even first digit are typically designed to bypass around major cities. Which option best describes this function?

Three-digit interstates with an even first digit are typically designed to bypass around major cities. Which option best describes this function?

• A. Connect downtown cores
• B. Bypass around major cities
• C. Serve as rural spurs
• D. Directly replace main highways

Answer: (B)

Three-digit interstates with an even first digit act as beltways or bypass routes that circle around a city and reconnect to the main highway, keeping through traffic out of the urban core. That purpose matches the idea of bypassing around major cities, reducing downtown congestion and providing an alternate path for long-distance travelers. In contrast, routes that head into the city center or serve as rural spurs or replacements for the main highway don’t fit this pattern.

Three-digit interstates with an even first digit act as beltways or bypass routes that circle around a city and reconnect to the main highway, keeping through traffic out of the urban core. That purpose matches the idea of bypassing around major cities, reducing downtown congestion and providing an alternate path for long-distance travelers. In contrast, routes that head into the city center or serve as rural spurs or replacements for the main highway don’t fit this pattern.