List of auxiliary Interstate Highways
From Wikipedia, the free encyclopedia
This is a list of auxiliary (three-digit) Interstate Highway designations in the United States. They are sorted in the following order:
- numerically by the primary Interstate Highway (one or two digits)
- alphabetically by the state of the auxiliary Interstate
- numerically by the auxiliary 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-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 (E) I-84 (W) I-85 I-86 I-87 I-89 I-90 I-91 I-93 I-94 I-95 I-96 Exceptions |
|---|
[edit] 
Interstate H-1
Auxiliary interstates associated with I-H-1:
[edit] 
Interstate 5
Auxiliary interstates associated with I-5:
-
I-105 (metro Los Angeles) -
I-205 (connection to I-580 near Tracy) -
I-305 (Sacramento; signed as I-80 Business) -
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)
[edit] 
Interstate 10
Auxiliary 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)
[edit] 
Interstate 15
Auxiliary 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)
[edit] 
Interstate 16
Auxiliary interstates associated with I-16:
[edit] 
Interstate 20
Auxiliary interstates associated with I-20:
-
I-220 (metro Shreveport)
-
I-520 (North Augusta) - same as the Georgia route
[edit] 
Interstate 24
Auxiliary interstates associated with I-24:
I-124 (mostly unsigned in Chattanooga)
[edit] 
Interstate 25
Auxiliary interstates associated with I-25:
[edit] 
Interstate 26
Auxiliary interstates associated with I-26:
I-126 (Columbia)
I-526 (Charleston)
[edit] 
Interstate 29
Auxiliary 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)
[edit] 
Interstate 30
Auxiliary interstates associated with I-30:
I-130 (proposed in Texarkana)
I-430 (Little Rock)
I-530 (Pine Bluff)
I-630 (Little Rock)
[edit] 
Interstate 35
Auxiliary 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
[edit] 
Interstate 40
Auxiliary interstates associated with I-40:
I-140 (Wilmington)
I-240 (Asheville)
I-440 (Raleigh)- I-540 (metro Raleigh-Durham)
I-840 (Greensboro)
[edit] 
Interstate 44
Auxiliary interstates associated with I-44:
[edit] 
Interstate 45
Auxiliary interstates associated with I-45:
[edit] 
Interstate 55
Auxiliary interstates associated with I-55:
I-155 (Caruthersville)
I-255 (metro St. Louis) - same as the Illinois route
[edit] 
Interstate 59
Auxiliary interstates associated with I-59:
I-359 (Tuscaloosa)
I-459 (metro Birmingham)
I-759 (Gadsden)
[edit] 
Interstate 64
Auxiliary interstates associated with I-64:
I-264 (metro Louisville)
- I-264 (from Portsmouth to Virginia Beach Oceanfront)
I-464 (from Norfolk to Chesapeake)
I-564 (Norfolk)
I-664 (from Newport News to Chesapeake)
[edit] 
Interstate 65
Auxiliary interstates associated with I-65:
I-165 (metro Mobile)
I-565 (metro Huntsville)
I-265 (metro Louisville)
[edit] 
Interstate 69
Auxiliary interstates associated with I-69:
[edit] 
Interstate 70
Auxiliary interstates associated with I-70:
I-270 (metro East St. Louis)
I-470 (Topeka)
I-670 (metro Kansas City)
- I-270 (Rockville/Gaithersburg/Frederick)
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
[edit] 
Interstate 71
Auxiliary interstates associated with I-71
I-271 (metro Cleveland)
I-471 (Cincinnati) - same as the Kentucky route
[edit] 
Interstate 72
Auxiliary interstates associated with I-72
I-172 (from east of Hannibal, Missouri to north of Quincy, Illinois)
[edit] 
Interstate 74
Auxiliary interstates associated with I-74
I-274 (proposed loop around Winston-Salem)
I-174 (proposed spur to North Myrtle Beach)
[edit] 
Interstate 75
Auxiliary interstates associated with I-75:
- I-175 (St. Petersburg) (spur of I-275)
- I-275 (Tampa Bay Area)
- I-375 (St. Petersburg) (spur of I-275)
- I-275 (metro Cincinnati)
- I-275 (metro Cincinnati) - same as the Indiana route
[edit] 
Interstate 76
Auxiliary interstates associated with the eastern I-76
- I-176 (Morgantown to Reading)
- I-276 (northern suburbs of Philadelphia) - Part of Pennsylvania Turnpike
- I-376 (metro Pittsburgh)
- I-476 (metro Philadelphia to Scranton) - Part of Pennsylvania Turnpike north of Norristown
- I-576 (proposed in metro Pittsburgh)
- I-676 (Philadelphia) - same as the New Jersey route
[edit] 
Interstate 77
Auxiliary interstates associated with I-77
[edit] 
Interstate 78
Auxiliary 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)
[edit] 
Interstate 79
Auxiliary interstates associated with I-79
[edit] 
Interstate 80
Auxiliary 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)
[edit] 
Interstate 81
Auxiliary interstates associated with I-81:
[edit] 
Interstate 82
Auxiliary interstates associated with I-82:
I-182 (metro Tri-Cities)
[edit] 
Interstate 83
Auxiliary interstates associated with I-83:
[edit] 
Interstate 84 (east)
Auxiliary interstates associated with I-84 (east):
I-384 (metro Hartford)
I-684 (metro New York City)
- I-684 (metro New York City) - same as the Connecticut route
[edit] Interstate 84 (west)
Auxiliary interstates associated with I-84 (west):
[edit] 
Interstate 85
Auxiliary interstates associated with I-85:
I-285 (proposed in Winston-Salem)
I-485 (metro Charlotte)
I-785 (proposed in Greensboro)
[edit] 
Interstate 87
Auxiliary interstates associated with I-87:
I-287 (metro New York City)
- I-287 (metro New York City) - same as the New Jersey route
I-487 - Cancelled Interstate planned to run from the Tappen Zee Bridge to the City of Beacon, NY
I-587 (Kingston)
I-687 - Cancelled Interstate planned to run north of Albany from I-90 @ Exit 5A through I-87 at Unbuilt Exit 3.
I-787 (Albany)
[edit] 
Interstate 89
Auxiliary interstates associated with I-89:
[edit] 
Interstate 90
Auxiliary 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)
[edit] 
Interstate 91
Auxiliary interstates associated with I-91:
I-291 (Springfield)
I-391 (metro Springfield)
[edit] 
Interstate 93
Auxiliary interstates associated with I-93:
I-293 (Manchester)
I-393 (Concord)
[edit] 
Interstate 94
Auxiliary interstates associated with I-94:
[edit] 
Interstate 95
Auxiliary interstates associated with I-95:
I-395 (north from near New London)
I-295- I-395
I-595 (unsigned in metro Washington, D.C.)
I-695 (unsigned)
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 (metro Fayetteville)
- I-295 (south from Trenton) - same as the New Jersey and Delaware Route, will eventually replace I-95 north of Pennsylvania Turnpike in 2010 when exit between both roads are completed and I-95 is rerouted.
- 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
[edit] 
Interstate 96
Auxiliary 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)
[edit] Exceptions
I-238 (Hayward, California) - has no "parent" interstate.
| Main Interstate Highways (multiples of 5 in pink) |  |
|||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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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