| Longest Interstate Highways |
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| North-South Interstates more than 1,000 miles long |
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| Interstates That Traverse the Most States |
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| Shortest 2-Digit Interstate Highways |
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| States with Most Interstate Mileage |
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| States with Most Interstate Highways |
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| State Capitals not directly served by the Interstate System (alphabetical by city) |
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