List of intrastate Interstate Highways

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The intrastate Interstate Highways in the contiguous United States, highlighted in red, not including Interstates 73 and 99.
The intrastate Interstate Highways in the contiguous United States, highlighted in red, not including Interstates 73 and 99.

There are several intrastate Interstate Highways; that is, Interstates that are located entirely within one state. The concept seems contradictory at first; it is important to note that the word "Interstate" refers to the way the highways are funded, not to the route they travel.

Interstate 4 - Tampa, FL (I-275) to Daytona Beach, FL (I-95)
Interstate 12 - Baton Rouge, LA (I-10) to Slidell, LA (I-10/I-59)
Interstate 16 - Macon, GA (I-75) to Savannah, GA
Interstate 17 - Phoenix, AZ (I-10) to Flagstaff, AZ (I-40)
Interstate 19 - Nogales, AZ (Mexican border) to Tucson, AZ (I-10)
Interstate 27 - Lubbock, TX (US-87) to Amarillo, TX (I-40)
Interstate 37 - Corpus Christi, TX (US-181) to San Antonio, TX (I-35)
Interstate 43 - Beloit, WI (I-39 & I-90) to Green Bay, WI (US-41)
Interstate 45 - Galveston, TX (TX-124) to Dallas, TX (I-30)
Interstate 49 - Lafayette, LA (I-10) to Shreveport, LA (I-20)
Interstate 73 - Candor, NC (US-220) to Greensboro, NC (I-40 & I-85)
Interstate 86 (west) - Heyburn, ID (I-84) to Pocatello, ID (I-15)
Interstate 87 - New York, NY (I-278) to Champlain, NY (Canadian border)
Interstate 88 (west) - Moline, IL (I-80) to Chicago, IL (I-290)
Interstate 88 (east) - Binghamton, NY (I-81) to Schenectady, NY (I-90)
Interstate 96 - Muskegon, MI (US-31) to Detroit, MI (I-75)
Interstate 97 - Annapolis, MD (US-50) to Baltimore, MD (I-695)
Interstate 99 - Bedford, PA (I-70/I-76) to Bald Eagle, PA (US-220)

Of course, Alaska's and Hawaii's interstate highways are fully within that state's boundaries. Puerto Rico is not a state; however, it also has internal highways funded by the Federal Government. H-1, H-2, and H-3 stand for Hawaii-1, 2, and 3 respectively. These freeways are part of the Interstate Highway System and are thus called interstate highways.

[edit] These interstates are not signed

[edit] Notes

  • This list only includes the primary Interstate highways (those with route numbers less than 100). Most (but not all) three digit Interstates are intrastate. Interstate H-201 is considered a three digit Interstate as well.
  • Interstate 99 currently has no direct connection with any other interstate. Surface roads connect it with I-70/I-76 at its south end.


edit
Main Interstate Highways (multiples of 5 in pink)		 Interstate Highway marker
4 5 8 10 12 15 16 17 19 20 22 24 25 26 27 29 30
35 37 39 40 43 44 45 49 55 57 59 64 65 66 66 (W) 68
69 70 71 72 73 74 75 76 (W) 76 (E) 77 78 79 80 81 82
83 84 (W) 84 (E) 85 86 (W) 86 (E) 87 88 (W) 88 (E) 89 90
91 93 94 95 96 97 99 (238) H-1 H-2 H-3
Unsigned  A-1 A-2 A-3 A-4 PRI-1 PRI-2 PRI-3
Lists  Main - Auxiliary - Suffixed - Business - Proposed - Unsigned
Gaps - Intrastate - Interstate standards - Replaced
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