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Longest U.S. Interstates Quiz

Can you name the 10 longest primary Interstate Highways?
Only including current and primary interstates (not auxiliary Interstate Highways).
Quiz by geographynerd
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Last updated: April 23, 2023
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First submittedFebruary 24, 2021
Times taken120
Average score90.0%
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Length (mi)
Termini
Interstate
3,020.44
Seattle, WA to Boston, MA
90
2,899.59
San Francisco, CA to Teaneck, NJ
80
2,556.61
Barstow, CA to Wilmington, NC
40
2,460.34
Santa Monica, CA to Jacksonville, FL
10
2,172.16
Cove Fort, UT to Baltimore, MD
70
1,919.31
Miami, FL to Houlton, ME
95
1,786.47
Miami Lakes, FL to Sault Ste. Marie, MI
75
1,585.20
Lockwood, MT to Port Huron, MI
94
1,568.38
Laredo, TX to Duluth, MN
35
1,539.38
Scroggins Draw, TX to Florence, SC
20
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