Some sample questions from this category:
* I-270 in Maryland runs from Frederick to near Bethesda. Which of the following 2di does it connect with at its northern end?
* What 3di is the longest?
* What 3di is the shortest?
* What is unique about I-238, in Hayward, CA?
* How many different I-295 segments are there?
* Louisville, KY is unique in the nation because of its 2 3di's. How?
* What 3di has a segment that goes through 3 different states (as of September 2000)?
* The Long Island Expressway is also designated
* I-395 (VA-DC) is also called this
* Which of these states does NOT have a 3di?
* Wyoming's only 3di, I-180, is unique in what way?
* What is the highest-numbered 3di associated with I-5?
* What is the only 3di with all three digits the same?
* What's unique about the 3di's of I-76?
* What would be the difference between the theoretical 3di's I-199 and I-299?
* How many 2di's (or 1di's) do NOT have 3di's associated with them?
* What will be unique about I-840 (TN) if it's finished to it's maximum extent?
* What's the number of the Capital Beltway that goes around Washington, DC?
* What 3di has the highest number?
* Interstate 80 and Interstate 15 run through which major city?
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