List of three-digit Interstate Highways
From Wikipedia, the free encyclopedia.
This is a list of 3-digit Interstate Highway route designations in the United States. They are sorted in the following order:
- numerically by the Primary Interstate Highway (1 or 2-digits)
- alphabetically by the state of the 3-digit Interstate
- numerically by the 3-digit Interstate itself.
| Contents: | I-H-1 I-5 I-10 I-15 I-16 I-20 I-24 I-25 I-26 I-29 I-30 I-35 I-238 I-40 I-44 I-45 I-55 I-59 I-64 I-65 I-66 I-69 I-70 I-71 I-72 I-74 I-75 I-76 I-77 I-78 I-79 I-80 I-81 I-82 I-83 I-84 I-85 I-86 I-87 I-89 I-90 I-91 I-93 I-94 I-95 I-96 I-97 |
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Interstate H-1
3-digit interstates associated with I-H-1:
Interstate 5
3-digit interstates associated with I-5:
- I-105 (metro Los Angeles)
- I-205 (connection to I-580 near Tracy)
- I-305 (Sacramento)
- I-405 (metro Los Angeles)
- I-505 (metro Sacramento)
- I-605 (metro Los Angeles)
- I-805 (metro San Diego)
- I-905 (proposed in metro San Diego)
- I-205 (Vancouver) - same as the Oregon route
- I-405 (metro Seattle)
- I-605 (proposed to bypass Seattle)
- I-705 (Tacoma)
Interstate 10
3-digit interstates associated with I-10:
- I-110 (metro Los Angeles)
- I-210 (metro Los Angeles)
- I-710 (metro Los Angeles)
- I-110 (Baton Rouge)
- I-210 (Lake Charles)
- I-310 (New Orleans)
- I-510 (New Orleans)
- I-610 (New Orleans)
- I-910 (unsigned in New Orleans)
Interstate 15
3-digit interstates associated with I-15:
- I-215 (metro San Bernardino-Riverside/Riverside County)
- I-115 (Butte, Montana)
- I-315 (unsigned in Great Falls)
- I-215 (metro Salt Lake City)
Interstate 16
3-digit interstates associated with I-16:
Interstate 20
3-digit interstates associated with I-20:
- I-220 (metro Shreveport)
- I-520 (North Augusta) - same as the Georgia route
Interstate 24
3-digit interstates associated with I-24:
- I-124 (mostly unsigned in Chattanooga)
Interstate 25
3-digit interstates associated with I-25:
Interstate 26
3-digit interstates associated with I-26:
- I-126 (Columbia)
- I-526 (Charleston)
Interstate 29
3-digit interstates associated with I-29:
- I-229 (metro St. Joseph)
- I-129 (South Sioux City) - same as the Iowa route
- I-229 (metro Sioux Falls)
Interstate 30
3-digit interstates associated with I-30:
- I-130 (proposed in Texarkana)
- I-430 (Little Rock)
- I-530 (Pine Bluff)
- I-630 (Little Rock)
Interstate 35
3-digit interstates associated with I-35:
- I-135 (from Wichita to Salina)
- I-235 (Wichita)
- I-335 (from Topeka to Emporia)
- I-435 (metro Kansas City)
- I-635 (metro Kansas City)
- I-435 (metro Kansas City) - same as the Kansas route
- I-635 (metro Kansas City) - same as the Kansas route
Interstate 38 (does not exist)
Interstate 40
3-digit interstates associated with I-40:
- I-140 (proposed in Fayetteville)
- I-140 (Wilmington)
- I-240 (Asheville)
- I-440 (Raleigh)
- I-540 (metro Raleigh-Durham)
- I-840 (Greensboro)
Interstate 44
3-digit interstates associated with I-44:
Interstate 45
3-digit interstates associated with I-45:
Interstate 55
3-digit interstates associated with I-55:
- I-155 (Caruthersville)
- I-255 (metro St. Louis) - same as the Illinois route
Interstate 59
3-digit interstates associated with I-59:
- I-359 (Tuscaloosa)
- I-459 (metro Birmingham)
- I-759 (Gadsden)
Interstate 64
3-digit interstates associated with I-64:
- I-264 (metro Louisville)
- I-264 (metro Norfolk)
- I-464 (Norfolk)
- I-564 (Norfolk)
- I-664 (from Newport News to Portsmouth)
Interstate 65
3-digit interstates associated with I-65:
- I-165 (metro Mobile)
- I-565 (Huntsville)
- I-265 (metro Louisville)
Interstate 69
3-digit interstates associated with I-69:
Interstate 70
3-digit interstates associated with I-70:
- I-270 (metro East St. Louis)
- I-470 (metro Kansas City)
- I-670 (metro Kansas City)
- I-270 (Rockville/Gaithersburg)
- I-370 (metro Washington, D.C.)
- I-170 (metro St. Louis)
- I-270 (metro St. Louis) - same as the Illinois route
- I-470 (metro Kansas City)
- I-670 (metro Kansas City) - same as the Kansas route
Interstate 71
3-digit interstates associated with I-71
- I-271 (metro Cleveland)
- I-471 (Cincinnati) - same as the Kentucky route
Interstate 72
3-digit interstates associated with I-72
- I-172 (from east of Hannibal, Missouri to north of Quincy, Illinois)
Interstate 74
3-digit interstates associated with I-74
Interstate 75
3-digit interstates associated with I-75:
- I-175 (St. Petersburg) (spur of I-275)
- I-275 (Tampa-St. Petersburg)
- I-375 (St. Petersburg) (spur of I-275)
- I-275 (metro Cincinnati)
- I-275 (metro Cincinnati) - same as the Indiana route
Interstate 76
3-digit interstates associated with I-76
- I-176 (Reading)
- I-276 (metro Philadelphia)
- I-376 (metro Pittsburgh)
- I-476 (metro Philadelphia to Scranton)
- I-576 (proposed in metro Pittsburgh)
- I-676 (Philadelphia) - same as the New Jersey route
Interstate 77
3-digit interstates associated with I-77
Interstate 78
3-digit interstates associated with I-78
- I-278 (New York City) - same as the New Jersey route
- I-478 (unsigned in New York City)
- I-678 (New York City)
- I-878 (unsigned in New York City)
Interstate 79
3-digit interstates associated with I-79
Interstate 80
3-digit interstates associated with I-80:
- I-280 (San Francisco Bay Area)
- I-380 (San Francisco Bay Area)
- I-580 (San Francisco Bay Area)
- I-680 (San Francisco Bay Area)
- I-780 (San Francisco Bay Area)
- I-880 (San Francisco Bay Area)
- I-980 (San Francisco Bay Area)
- I-280 (Davenport) - same as the Illinois route
- I-380 (Waterloo, Cedar Rapids, Iowa City)
- I-480 (Council Bluffs)
- I-680 (metro Omaha, Nebraska)
Interstate 81
3-digit interstates associated with I-81:
Interstate 82
3-digit interstates associated with I-82:
- I-182 (metro Tri-Cities)
Interstate 83
3-digit interstates associated with I-83:
Interstate 84
3-digit interstates associated with I-84:
- I-384 (metro Hartford)
- I-684 (metro New York City)
- I-684 (metro New York City) - same as the Connecticut route
Interstate 85
3-digit interstates associated with I-85:
- I-285 (proposed in Winston-Salem)
- I-485 (metro Charlotte)
- I-785 (proposed in Greensboro)
Interstate 87
3-digit interstates associated with I-87:
- I-287 (metro New York City)
Interstate 89
3-digit interstates associated with I-89:
Interstate 90
3-digit interstates associated with I-90:
- I-190 (Buffalo)
- I-290 (Buffalo)
- I-390 (Rochester)
- I-490 (Rochester)
- I-590 (Rochester)
- I-690 (Syracuse)
- I-790 (Utica)
- I-890 (Schenectady)
- I-990 (Buffalo)
Interstate 91
3-digit interstates associated with I-91:
- I-291 (Springfield)
- I-391 (metro Springfield)
Interstate 93
3-digit interstates associated with I-93:
- I-293 (Manchester)
- I-393 (Concord)
Interstate 94
3-digit interstates associated with I-94:
Interstate 95
3-digit interstates associated with I-95:
- I-395 (north from near New London)
- I-195 (Miami)
- I-295 (Jacksonville)
- I-395 (Miami)
- I-595 (Fort Lauderdale)
- I-795 (proposed in Jacksonville)
- I-195 (metro Baltimore)
- I-295 (metro Washington, D.C.) - same as the District of Columbia route
- I-395 (Baltimore)
- I-495 (metro Washington, D.C.)
- I-595 (unsigned in metro Washington, D.C.)
- I-695 (metro Baltimore)
- I-795 (metro Baltimore)
- I-895 (metro Baltimore)
- I-195 (to Cape Cod)
- I-295 (Attleboro)
- I-395 (south from near Worcester) - same as the Connecticut route
- I-495 (metro Boston)
- I-195 (Jersey Shore)
- I-295 (south from Trenton) - same as the Delaware route
- I-295 (New York City)
- I-495 (metro New York City)
- I-695 (New York City)
- I-895 (New York City)
- I-295 (proposed in Fayetteville)
- I-295 (future continuation of I-295 south from the New Jersey border along the current route of I-95 to its junction with I-276
- I-195 (metro Providence) - same as the Massachusetts route
- I-295 (metro Providence) - same as the Massachusetts route
- I-195 (Richmond)
- I-295 (metro Richmond)
- I-395 (metro Washington, D.C.) - same as the District of Columbia route
- I-495 (metro Washington, D.C.) - same as the Maryland route
Interstate 96
3-digit interstates associated with I-96:
- I-196 (from Grand Rapids to Benton Harbor)
- I-296 (unsigned in Grand Rapids)
- I-496 (Lansing)
- I-696 (metro Detroit)
Superlatives
- Only 2 3DIs that run concurrent: I-271 and I-480 (around Cleveland, Ohio)
- Only 3DI in Hawaii: I-H201
- Only orphan: I-238
- Shortest signed interstate: I-375 (Michigan)
- Longest 3DI: I-476
| Primary Interstate Highways |  |
||||||
| 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 | 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 Interstate Highways | |||||||
| A-1 | A-2 | A-3 | A-4 | PRI-1 | PRI-2 | PRI-3 | |
| Lists Two-digit Interstates - Three-digit Interstates Gaps in Interstates - Intrastate Interstates Interstate standards - Proposed Interstates |
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