Which way do 2-digit even numbered interstate highways run?

Which way do 2-digit even numbered interstate highways run?

• A. East-west
• B. North-south
• C. Diagonal
• D. Circulating loop

Answer: (A)

Even-numbered primary interstates are designated to run primarily east-west, while odd-numbered ones run north-south. This numbering convention is built into the system to give you a quick sense of direction just from the number. For example, routes like I-10 and I-90 traverse east-west, whereas I-5 and I-95 run north-south. So a two-digit interstate with an even number is oriented east-west, making that the best answer. Diagonal routes or circulating loop belts aren’t the standard orientation for these primary interstates.