Dwight D. Eisenhower National System of Interstate and Defense Highways | |
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System information | |
Formed | June 29, 1956[1] |
Highway names | |
Interstates | Interstate X (I-X) |
System links | |
Auxiliary Interstate Highways (also called three-digit Interstate Highways) are a subset of highways within the United States' Interstate Highway System. The 323 auxiliary routes generally fall into three types: spur routes, which connect to or intersect the parent route at one end; bypasses, which connect to the parent route at both ends; and beltways, which form a circle that intersects the parent route at two locations. Some routes connect to the parent route at one end but to another route at the other end; some states treat these as spurs while others treat them as bypasses. Like the primary Interstate Highways, auxiliary highways meet Interstate Highway standards (with rare exceptions).
The shorter auxiliary routes branch from primary routes; their numbers are based on the parent route's number. All of the supplement routes for Interstate 95 (I-95) are designated with a three-digit number ending in "95": I-x95. With some exceptions, spur routes are numbered with an odd hundreds digit (such as I-395), while bypasses and beltways are numbered with an even hundreds digit (such as I-695). Because longer Interstates may have many such supplemental routes, the numbers can repeat from state to state along their route, but they will not repeat within a state.
There are three states that have no auxiliary Interstate Highways: Alaska, Arizona, and New Mexico. North Dakota has an auxiliary route, but it is unsigned, and Wyoming's does not meet Interstate Highway standards.
Auxiliary Interstates are divided into three types: spur, loop, and bypass routes.
The first digit of the three digits usually signifies whether a route is a bypass, spur, or beltway. The last two digits are derived from the main Interstate Highway. For instance, I-515 contains an odd number in the first digit (5), which indicates that this freeway is a spur. The last two digits signify the highway's origin. In this case, the "15" in I-515 shows that it is a supplement to I-15.
Exceptions to the standard numbering guidelines exist for a number of reasons. In some cases, original routes were changed, extended, or abandoned, leaving discrepancies in the system. In other cases, it may not be possible to use the proper number because the limited set of available numbers has been exhausted, causing a "non-standard" number to be used.
Aspur route's number usually has an odd number for its first digit.[2] It is usually one of the following:
Examples include:
Sometimes, a three-digit Interstate Highway branches off from another three-digit Interstate Highway. These spurs do not connect directly with their parent highways, but are associated with them via the three-digit highways they do intersect with.
Examples include:
Abypass route may traverse around a city, or may run through it with the mainline bypassing. In a typical 3-digit Interstate Highway, bypasses usually have both its two termini junctioned with another Interstate highway. Bypass routes are preceded by an even number in the first digit.[2]
Examples include:
In the case of an auxiliary Interstate highway which has both ends at Interstates but not the same Interstate, some states treat these as bypasses while others treat these as spurs—see Spur route above.
Abeltway (also known as a loop route) completely surrounds a metropolitan city, and it is often connected with multiple junctions to other routes. Unlike other auxiliary Interstate Highways (and by extension, all primary Interstate Highways), beltways do not have termini; however, they have a place where the highway mileage resets to zero. Beltways are also preceded by an even number in the first digit.[2]
Some examples of beltways include:
Number | Length (mi)[3] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
---|---|---|---|---|---|---|---|---|
H-201 | 4.10 | 6.60 | H-1inHalawa, HI | H-1 in Honolulu, HI | 02004-01-012004[4] | current | Signed as Route 78 until 2004 | |
I-105 | 17.32 | 27.87 | SR 1inEl Segundo, CA | I-605inNorwalk, CA | 01963-01-011963 | current | Replaced segments of SR 42 | |
I-205 | 12.97 | 20.87 | I-580 near Tracy, CA | I-5 near Tracy, CA | 01970-01-011970 | current | ||
I-305 | 6.00 | 9.66 | I-80inWest Sacramento, CA | I-80 Bus/US 50/SR 99inSacramento, CA | 01981-01-011981 | current | Unsigned | |
I-405 | 72.15 | 116.11 | I-5inIrvine, CA | I-5 in Mission Hills, CA | 01964-01-011964 | current | ||
I-505 | 32.98 | 53.08 | I-80inVacaville, CA | I-5inDunnigan, CA | 01977-01-011977 | current | Originally part of I-5W | |
I-605 | 27.40 | 44.10 | I-405inSeal Beach, CA | I-210inIrwindale, CA | 01964-01-011964 | current | ||
I-805 | 28.02 | 45.09 | I-5inSan Ysidro, CA | I-5 in Sorrento Valley, CA | 01959-01-011959 | current | ||
I-905 | 8.96[5] | 14.42 | I-5inSan Ysidro, CA | Fed. 2 at the United States-Mexico borderinOtay Mesa, CA | proposed | — | Currently SR 905, proposed to be signed as an Interstate | |
I-105 | 3.49 | 5.62 | OR 99inEugene, OR | I-5inSpringfield, OR | 01958-01-011958 | current | ||
I-305 | — | — | Pine Street in Salem, OR | I-5inKeizer, OR | 01957-01-011957 | 01976-01-011976 | Canceled | |
I-405 | 3.53 | 5.68 | I-5inPortland, OR | I-5 in Portland, OR | 01958-01-011958 | current | ||
I-505 | 3.17 | 5.10 | US 30inPortland, OR | I-405 in Portland, OR | 01969-01-011969 | 01979-01-011979 | Canceled | |
I-205 | 36.64 | 58.97 | I-5inTualatin, OR | I-5inSalmon Creek, WA | 01958-01-011958 | current | ||
I-405 | 30.30 | 48.76 | I-5/SR 518inTukwila, WA | I-5/SR 525inLynnwood, WA | 01957-01-011957 | current | ||
I-605 | — | — | WA 99inFederal Way, WA | I-5inEverett, WA | — | — | Never built, was planned to bypass Seattle, WA | |
I-705 | 1.50 | 2.41 | I-5/SR 7inTacoma, WA | Schuster Parkway in Tacoma | 01978-01-011978 | current | ||
I-210 | 4.9 | 7.9 | I-10inMobile, AL | I-65inPrichard, AL | — | — | Currently I-165, the route number was decommissioned because it had no connection to I-10 | |
I-410 | — | — | I-10/I-17inPhoenix, AZ | I-10 in Phoenix, AZ | — | — | Now part of I-10 in Phoenix, AZ | |
I-510 | — | — | I-10/SR 51inPhoenix, AZ | SR 101 in Phoenix, AZ | — | — | Currently designated as SR 51 (Piestewa Freeway) | |
I-710 | — | — | I-10inTucson, AZ | North Campbell Avenue/East 6th Street in Tucson, AZ | — | — | Mostly never built freeway that was to connect to University of Arizona campus from I-10 | |
I-110 | 20.43 | 32.88 | SR 47inSan Pedro, CA | I-10/SR 110inLos Angeles, CA | 01978-01-011978 | current | Originally part of US 6, then signed as SR 11 | |
I-210 | 48.72 | 78.41 | I-5inSylmar, CA | SR 57/SR 210inGlendora, CA | 01964-01-011964 | current | Does not connect physically with I-10 as segment from SR 57 east to I-10 is still signed as SR 210, formerly SR 30 prior to 2007. | |
I-710 | 19.66 | 31.64 | Terminal IslandinLong Beach, CA | Valley BoulevardinAlhambra, CA | 01983-01-011983 | current | Originally signed as SR 7 | |
I-110 | 6.94 | 11.17 | US 98 Bus. near Pensacola, FL | I-10 near Pensacola, FL | 01969-01-011969 | current | ||
I-110 | 8.89 | 14.31 | I-10inBaton Rouge, LA | US 61 in Baton Rouge, LA | 01964-01-011964 | current | ||
I-210 | 12.40 | 19.96 | I-10 west of Lake Charles, LA | I-10 east of Lake Charles, LA | 01964-01-011964 | current | ||
I-310 | 11.25 | 18.11 | US 90/LA 3127inBoutte, LA | I-10 west of Kenner, LA | 01983-01-011983 | current | ||
I-310 | 2.70 | 4.35 | US 90 Bus.inNew Orleans, LA | I-10 in New Orleans, LA | 01964-01-011964 | 01969-01-011969 | Canceled Vieux Carré Riverfront Expressway | |
I-410 | 1.90 | 3.06 | LA 67inBaton Rouge, LA | I-10 in Baton Rouge, LA | 01961-01-011961 | 01964-01-011964 | Renumbered as I-110 | |
I-410 | 48.5 | 78.1 | I-10 west of New Orleans, LA | I-10 in New Orleans, LA | 01969-01-011969 | 01977-01-011977 | Canceled southern bypass of New Orleans; completed portions became I-310 and I-510 | |
I-510 | 3.04 | 4.89 | LA 47inNew Orleans, LA | I-10/LA 47 in New Orleans, LA | 01992-01-011992 | current | ||
I-610 | 4.52 | 7.27 | I-10atMetairie–New Orleans, LA line | I-10 in New Orleans, LA | 01965-01-011965 | current | ||
I-910 | 9.70 | 15.61 | US 90 Bus.inMarrero, LA | I-10/US 90 Bus. in New Orleans, LA | 01999-01-011999 | current | Unsigned; completely concurrent with US 90 Bus.; both designation are temporary placeholders for Future I-49 | |
I-110 | 4.10 | 6.60 | US 90inBiloxi, MS | I-10inD'Iberville, MS | 01988-01-011988 | current | ||
I-310 | — | — | US 90 near the Port of Gulfport, MS | I-10 in Gulfport, MS | proposed | — | Future spur into Gulfport, MS | |
I-110 | 0.92 | 1.48 | Av Abraham Lincoln at the United States-Mexico borderinEl Paso, TX | I-10 in El Paso, TX | 01967-01-011967 | current | ||
I-410 | 49.49 | 79.65 | Beltway around San Antonio, TX | 01959-01-011959 | current | |||
I-610 | 37.97 | 61.11 | Beltway around Houston, TX | 01975-01-011975 | current | |||
I-215 | 54.50 | 87.71 | I-15inMurrieta, CA | I-15 in Devore, CA | 01982-01-011982 | current | Originally signed as I-15E, then SR 215 | |
I-115 | 1.19 | 1.92 | I-15/I-90inButte, MT | Iron Street in Butte, MT | 01971-01-011971 | current | ||
I-315 | 0.83 | 1.34 | I-15inGreat Falls, MT | I-15 Bus/US 89 in Great Falls, MT | 01960-07-231960 | current | Unsigned | |
I-215 | 11.10 | 17.86 | I-15/Clark County Route 215inEnterprise, NV | I-11/US 93/SR 564inHenderson, NV | 01996-01-011996 | current | ||
I-515 | 20.54 | 33.06 | US 93/US 95inHenderson, NV | I-15/US 93/US 95 in Las Vegas, NV | 01976-01-011976 | 02024-01-012024 | Not signed until 1994, this route is entirely concurrent with US 93/US 95; replaced by northward extensions of I-11 in 2017 and 2024 | |
I-215 | 29.02 | 46.70 | I-80inSalt Lake City, UT | I-15inNorth Salt Lake, UT | 01963-01-011963 | current | ||
I-415 | 2.39 | 3.85 | I-80inSalt Lake City, UT | 4430 SinHolladay, UT | 01965-01-011965 | 01969-01-011969 | Designation was scrapped to provide a single route number 215 for the entire route. | |
I-516 | 6.49 | 10.44 | SR 21/SR 204inSavannah, GA | SR 21 in Garden City, GA | 01985-01-011985 | current | ||
I-420 | 5.40 | 8.69 | I-285inCollege Park, GA | I-20inAtlanta, GA | 01983-01-011983 | 01986-01-011986 | Never built, was planned to bypass Atlanta, GA | |
I-520 | 23.34 | 37.56 | I-20inAugusta, GA | I-20inNorth Augusta, SC | 01980-01-011980 | current | ||
I-220 | 17.62 | 28.36 | I-20/LA 3132inShreveport, LA | I-20 in Bossier City, LA | 01979-01-011979 | current | ||
I-420 | 10.20 | 16.42 | I-20inWest Monroe, LA | I-20 in Monroe, LA | 01957-01-011957 | 01964-01-011964 | Canceled bypass of Monroe | |
I-220 | 12.01 | 19.33 | I-20inJackson, MS | I-55inRidgeland, MS | 01981-01-011981 | current | ||
I-820 | 35.17 | 56.60 | I-20inFort Worth, TX | I-20/US 287 in Fort Worth, TX | 01959-01-011959 | current | ||
I-222 | — | — | I-22inGraysville, AL | I-422inBrookside, AL | proposed | — | Proposed connector between I-422 and I-22 due to the inability to make a direct connection between the two routes. | |
I-422 | — | — | I-20/I-59/I-459/US 11inBessemer, AL | I-59 in Argo, AL | proposed | — | Currently under construction; will only be indirectly connected to I-22 via I-222. | |
I-124 | 1.97 | 3.17 | I-24inChattanooga, TN | US 27 in Chattanooga, TN | 01960-01-011960 | current | Unsigned | |
I-225 | 12.00 | 19.31 | I-25inDenver, CO | I-70inAurora, CO | 01976-01-011976 | current | ||
I-425 | 5.31 | 8.55 | I-25/US 36atWelby, CO | I-70/US 36 at Denver, CO | — | 01959-01-011959 | Renumbered as I-270byAASHTO | |
I-126 | 3.68 | 5.92 | I-26inColumbia, SC | US 21/US 76/US 176/US 321 in Columbia, SC | 01961-01-011961 | current | ||
I-326 | 5.24 | 8.43 | I-26inCayce, SC | SC 48inColumbia, SC | 01976-01-011976 | 01995-01-011995 | Now part of I-77, formerly unsigned | |
I-526 | 19.26 | 31.00 | US 17inCharleston, SC | I-526 Bus./US 17 in Mount Pleasant, SC | 01989-01-011989 | current | ||
I-129 | 3.48 | 5.60 | US 20/US 75/US 77inSouth Sioux City, NE | I-29/US 20/US 75inSioux City, IA | 01976-01-011976 | current | ||
I-229 | 14.97 | 24.09 | I-29inSt. Joseph, MO | I-29/US 59/US 71 in St. Joseph, MO | 01986-01-011986 | current | ||
I-229 | 11.33 | 18.23 | I-29inSioux Falls, SD | I-90 near Sioux Falls, SD | 01966-01-011966 | current | ||
I-130 | 5 | 8.0 | I-30/I-49inTexarkana, AR | US 59/US 71 near Texarkana, AR | 02000-01-012000 | 02014-01-012014 | Was given a future designation during its existence due to not being upgraded to Interstate Highway standards; freeway became part of I-49 once completed | |
I-430 | 12.93 | 20.81 | I-30/US 67inLittle Rock, AR | I-40/US 65 in Little Rock, AR | 01980-01-011980 | current | ||
I-530 | 46.65 | 75.08 | US 65inPine Bluff, AR | I-30/I-440inLittle Rock, AR | 01999-01-011999 | current | ||
I-630 | 7.40 | 11.91 | I-430 near Little Rock, AR | I-30 in Little Rock, AR | 01985-01-011985 | current | ||
I-235 | 13.78 | 22.18 | I-35/I-80inWest Des Moines, IA | I-35/I-80 near Des Moines, IA | 01961-01-011961 | current | ||
I-135 | 95.74 | 154.08 | Kansas Turnpike/I-35inWichita, KS | I-70/US 81inSalina, KS | 01976-01-011976 | current | ||
I-235 | 16.52 | 26.59 | I-135/US 81inWichita, KS | I-135/US 81/K-15/K-254 in Wichita, KS | 01965-01-011965 | current | ||
I-335 | 50.13 | 80.68 | I-35/Kansas Turnpike/US 50inEmporia, KS | I-470/Kansas Turnpike in Topeka, KS | 01987-01-011987 | current | ||
I-435 | 80.81 | 130.05 | Beltway around Kansas City, KS, and Kansas City, MO | 01965-01-011965 | current | |||
I-635 | 8.90 | 14.32 | I-35inOverland Park, KS | I-29/US 71inKansas City, MO | 01968-01-011968 | current | ||
I-335 | 2.74[6] | 4.41 | I-94inMinneapolis, MN | I-35W in Minneapolis, MN | 01964-01-011964 | 01978-01-011978 | Canceled | |
I-535 | 2.78 | 4.47 | I-35/US 53inDuluth, MN | US 53/WIS 35inSuperior, WI | 01971-01-011971 | current | ||
I-235 | 5.36 | 8.63 | I-35/I-40inOklahoma City, OK | I-44 in Oklahoma City, OK | 01989-01-011989 | current | ||
I-335 | 19.6 | 31.5 | SE 89th Street in Oklahoma City, OK | I-44inLuther, OK | 02024-01-012024 | current | Routed along the Kickapoo Turnpike[7] | |
I-635 | 37.00 | 59.55 | SH 121inGrapevine, TX | I-20inBalch Springs, TX | 01959-01-011959 | current | ||
I-440 | 9.96 | 16.03 | I-30/I-530 near Little Rock, AR | I-40/AR 440 near Little Rock, AR | 02003-01-012003 | current | ||
I-540 | 15.87 | 25.54 | US 271/AR 253 near Fort Smith, AR | I-40inVan Buren, AR | 01965-01-011965 | current | ||
I-140 | 25.4 | 40.9 | US 17 near Winnabow, NC | I-40/US 17 in Wilmington, NC | 02008-01-012008 | current | ||
I-240 | 9.54 | 15.35 | I-26/I-40/US 74 near Asheville, NC | I-40/US 74A in Asheville, NC | 01980-01-011980 | current | ||
I-440 | 16.77 | 26.99 | I-40/US 1/US 64 near Cary, NC | I-40 near Raleigh, NC | 01991-01-011991 | current | ||
I-540 | 25.84 | 41.59 | I-40 near Durham, NC | I-87/US 64/US 264 near Knightdale, NC | 01997-01-011997 | current | ||
I-840 | 21.9 | 35.2 | I-40/I-73/US 421inGreensboro, NC | I-40/I-85/I-785/I-85 Bus. in Greensboro, NC | 02011-01-012011 | current | ||
I-240 | 16.22 | 26.10 | I-44/US 62inOklahoma City, OK | I-40/US 270 in Oklahoma City, OK | 01965-01-011965 | current | ||
I-440 | 9.96 | 16.03 | I-40/I-240 near Oklahoma City, OK | I-35 in Oklahoma City, OK | — | 01975-01-011975 | Now part of I-44 | |
I-140 | 11.17 | 17.98 | I-40 near Farragut, TN | US 129 near Alcoa, TN | 01987-01-011987 | current | ||
I-240 | 19.27 | 31.01 | I-40inMemphis, TN | I-40 in Memphis, TN | 01970-01-011970 | current | ||
I-440 | 7.64 | 12.30 | I-40inNashville, TN | I-24 in Nashville, TN | 01987-01-011987 | current | ||
I-640 | 7.03 | 11.31 | I-40inKnoxville, TN | I-40 in Knoxville, TN | 01982-01-011982 | current | ||
I-840 | 77.28[8] | 124.37 | I-40 near Dickson, TN | I-40 near Lebanon, TN | 02016-01-012016 | current | Originally designated SR 840 until completion | |
I-244 | 20 | 32 | I-270/I-55inMehlville, MO | I-270/I-70inBridgeton, MO | — | — | Redesginated as I-270 in the late-1970s for consistency along the St. Louis Beltway | |
I-244 | 15.75 | 25.35 | I-44inTulsa, OK | I-44 in Tulsa, OK | 01970-01-011970 | current | ||
I-344 | 29.4 | 47.3 | I-240inOklahoma City, OK | I-35 and I-44/Turner Turnpike in Oklahoma City, OK | 02024-01-012024 | current | Routed along the John Kilpatrick Turnpike[7] | |
I-444 | 2.51 | 4.04 | I-244inTulsa, OK | I-244 in Tulsa, OK | 01970-01-011970 | current | Unsigned | |
I-345 | 1.40 | 2.25 | I-30/I-45inDallas, TX | US 75 in Dallas, TX | 01973-01-011973 | current | Unsigned | |
I-555 | 49.80 | 80.15 | I-55inTurrell, AR | AR 91inJonesboro, AR | 02016-01-012016 | current | ||
I-155 | 32.13 | 51.71 | I-55inLincoln, IL | I-74inMorton, IL | 01992-01-011992 | current | ||
I-255 | 30.82 | 49.60 | I-55/I-270inMehlville, MO | I-270/IL 255inPontoon Beach, IL | 01986-01-011986 | current | ||
I-355 | 32.51 | 52.32 | I-80inNew Lenox, IL | I-290inItasca, IL | 01989-01-011989 | current | ||
I-155 | 15.93 | 25.64 | I-55 near Hayti, MO | US 51atDyersburg, TN | 01980-01-011980 | current | ||
I-255 | — | — | I-55/I-240inMemphis, TN | I-40 in Memphis, TN | — | — | Now part of I-55 and I-240 | |
I-359 | 2.30 | 3.70 | I-20/I-59 in southern Tuscaloosa, AL | 15th Street in downtown Tuscaloosa, AL | 01983-01-011983 | current | ||
I-459 | 32.80 | 52.79 | I-20/I-59inBessemer, AL | I-59 in Trussville, AL | 01984-01-011984 | current | ||
I-759 | 4.50 | 7.24 | I-59inAttalla, AL | US 411/SR 759inGadsden, AL | 01986-01-011986 | current | ||
I-164 | 21.39[9] | 34.42 | US 41/Veterans Memorial Parkway in Evansville, IN | I-69 in Evansville, IN | 01990-01-011990 | 02014-01-012014 | Decommissioned; now part of I-69[10] | |
I-264 | 22.93 | 36.90 | I-64inLouisville, KY | I-71 in Louisville, KY | 01956-01-011956 | current | ||
I-264 | 25.07 | 40.35 | I-64/I-664inChesapeake, VA | Parks Ave in Virginia Beach, VA | 01960-01-011960 | current | ||
I-464 | 4.71 | 7.58 | I-64inChesapeake, VA | I-264inNorfolk, VA | 01960-01-011960 | current | ||
I-564 | 3.03 | 4.88 | SR 337 | I-64inNorfolk, VA | 01970-01-011970 | current | ||
I-664 | 20.21 | 32.52 | I-64/I-264inNorfolk, VA | I-64 in Hampton, VA | 01971-01-011971 | current | ||
I-165 | 4.90 | 7.89 | US 43inMobile, AL | I-65 in Mobile, AL | 01994-01-011994 | current | ||
I-565 | 21.40 | 34.44 | I-65/US 72/SR 20inDecatur, AL | US 72 in Huntsville, AL | 01991-01-011991 | current | ||
I-265 | 2 | 3.2 | I-40inNashville, TN | I-65 in Nashville, TN | — | 02000-01-012000 | Now part of I-65 | |
I-165 | 69.684 | 112.146 | I-65inBowling Green, KY | US 60/US 231inOwensboro, KY | 02019-01-012019 | current | Replaced the William H. Natcher Parkway; originally designated as I-66 Spur in 2008 followed by I-65 Spur in 2015 | |
I-365 | 88 | 142 | I-65 near Park City, KY | US 27inSomerset, KY | proposed | — | Future designation along the Cumberland Parkway | |
I-165 | 2.70 | 4.35 | I-65/I-70inIndianapolis, IN | 38th Street in Indianapolis, IN | 01978-01-011978 | 01981-01-011981 | Was to be a spur linking from I-65/70 to 38th Street entirely with Indianapolis | |
I-265 | 31.21 | 50.23 | I-64/US 150/SR 62inNew Albany, IN | I-65/I-265/KY 841inHeritage Creek, KY | 01977-01-011977 | current | Completed on December 18, 2016, with the completion of the East End Bridge that connected the Indiana segment to the Kentucky segment | |
I-465 | 52.79 | 84.96 | Beltway around Indianapolis | 01970-01-011970 | current | |||
I-865 | 4.72 | 7.60 | I-65 near Indianapolis, IN | I-465 near Indianapolis | 02002-01-012002 | current | ||
I-66 Spur |
69.684 | 112.146 | I-65inBowling Green, KY | US 60/US 231inOwensboro, KY | 02008-01-012008 | 02015-01-012015 | Designation was to replace the William H. Natcher Parkway as part of the proposed I-66 Southern Kentucky Corridor; the route was redesignated as I-65 Spur (which became I-165) when the I-66 project was cancelled | |
I-266 | 1.79 | 2.88 | I-66inArlington, Virginia | I-66inWashington, D.C. | — | 01972-01-011972 | Proposed loop route of I-66 between the District, and Arlington County; if built, would have been the only auxiliary route of I-66; canceled in the face of community opposition during Washington's freeway revolts | |
I-169 | 34.27 | 55.15 | I-24 near Hopkinsville, KY | I-69inNortonville, KY | 02017-05-072017 | current | New designation along the former Pennyrile Parkway; currently unsigned pending upgrade to Interstate standards | |
I-369 | 23.441 | 37.725 | I-69/Pennyrile ParkwayinHenderson, KY | US 60inOwensboro, KY | proposed | — | Proposed for designation along Audubon Parkway once upgraded to Interstate standards | |
I-569 | 38.446 | 61.873 | I-69/I-169inNortonville, KY | I-165inBeaver Dam, KY | proposed | — | Future designation for the western part of Western Kentucky Parkway once upgraded to Interstate standards | |
I-269 | 45.19 | 72.73 | I-55/I-69/MS 304inHernando, MS | I-40/SR 385inArlington, TN | 02015-01-012015 | current | Construction completed in October 2018; co-signed with SR 304 in Mississippi; extension to Millington, TN to connect with the proposed I-69 extension planned | |
I-169 | 18.7 | 30.1 | US 45W/US 51inUnion City, TN | US 45E/SR 43inMartin, TN | proposed | — | Proposed for designation along SR 22 once upgraded to Interstate standards | |
I-469 | 30.83 | 49.62 | I-69inFort Wayne, IN | I-69 in Fort Wayne, IN | 01995-01-011995 | current | ||
I-169 | 1.50 | 2.41 | Port of BrownsvilleinBrownsville, TX | I-69E/US 77/US 83inOlmito, TX | 02015-01-012015 | current | Currently under construction; partially open and co-signed with SH 550 | |
I-369 | 3.50 | 5.63 | I-30/US 59inTexarkana, TX | US 59/SH 93 in Texarkana, TX | 02013-01-012013 | current | Partially completed in 2013 | |
I-270 | 5.31 | 8.55 | I-25/US 36atWelby, CO | I-70/US 36 at Denver, CO | 01965-01-011965 | current | ||
I-470 | — | — | Beltway around Denver Metro, CO | — | — | Northwestern portion cancelled due to local opposition; completed segments are designated as SH 470orE-470 | ||
I-270 | 50.59 | 81.42 | I-55/I-255inMehlville, MO | I-55/I-70 near Troy, IL | 01956-01-011956 | current | ||
I-470 | 13.72 | 22.08 | I-70inTopeka, KS | I-70/Kansas Turnpike in Topeka, KS | 01960-01-011960 | current | ||
I-670 | 2.81 | 4.52 | I-70inKansas City, KS | I-70inKansas City, MO | 01968-01-011968 | current | ||
I-170 | 2.30 | 3.70 | I-70inBaltimore, MD | US 40 in Baltimore, MD | 01969-01-011969 | 01983-01-011983 | Canceled | |
I-270 | 32.60 | 52.46 | I-70 near Frederick, MD | I-495 north of Bethesda, MD | 01975-01-011975 | current | ||
I-270 Spur |
2.10[11] | 3.38 | I-270 east of Potomac, MD | I-495 northwest of Bethesda, MD | 01975-01-011975 | current | Serves as an alternate connector for Virginia travelers | |
I-370 | 2.54 | 4.09 | I-270inGaithersburg, MD | MD 200inDerwood, MD | 01988-01-011988 | current | ||
I-170 | 11.17 | 17.98 | I-64/US 40inRichmond Heights, MO | I-270inHazelwood, MO | 01956-01-011956 | current | ||
I-470 | 16.72 | 26.91 | I-49/I-435 in Kansas City, MO | I-70inIndependence, MO | 01983-01-011983 | current | ||
I-270 | 54.97 | 88.47 | Beltway around Columbus, OH | 01964-01-011964 | current | |||
I-470 | 6.69 | 10.77 | I-70 near Blaine, OH | I-70inElm Grove, WV | 01976-01-011976 | current | ||
I-670 | 9.37 | 15.08 | I-70inColumbus, OH | I-270 near John Glenn Columbus International Airport | 02003-01-012003 | current | ||
I-271 | 46.06 | 74.13 | I-71 near Medina, OH | I-90inWilloughby Hills, OH | 01964-01-011964 | current | ||
I-471 | 5.75 | 9.25 | I-275 near Newport, KY | I-71inCincinnati, OH | 01981-01-011981 | current | ||
I-172 | 19.69 | 31.69 | I-72inQuincy, IL | US 24 in Quincy, IL | 01995-01-011995 | current | ||
I-474 | 14.88 | 23.95 | I-74inPeoria, IL | I-74 in Morton, IL | 01973-01-011973 | current | ||
I-274 | 16.83 | 27.09 | US 158 near Clemmons, NC | Future I-74/Future I-285/US 52inBethania, NC | proposed | — | Proposed route in Winston-Salem, NC | |
I-175 | 1.44 | 2.32 | I-275inSt. Petersburg, FL | SR 687 in St. Petersburg, FL | 01980-01-011980 | current | ||
I-275 | 60.64 | 97.59 | I-75 near Memphis, FL | I-75 in Wesley Chapel, FL | 01973-01-011973 | current | ||
I-375 | 1.34 | 2.16 | I-275inSt. Petersburg, FL | US 92 in St. Petersburg, FL | 01979-01-011979 | current | ||
I-175 | — | — | US 82inAlbany, GA | I-75inCordele, GA | — | — | Now part of SR 300 | |
I-475 | 15.83 | 25.48 | I-75inMacon, GA | I-75 in Macon, GA | 01965-01-011965 | current | ||
I-575 | 30.97 | 49.84 | I-75inKennesaw, GA | SR 5 west of Nelson, GA | 01985-01-011985 | current | ||
I-675 | 11.04 | 17.77 | I-75inStockbridge, GA | I-285 southeast of Atlanta, GA | 01987-01-011987 | current | ||
I-275 | 83.71 | 134.72 | Beltway around Cincinnati, OH | 01962-01-011962 | current | Runs through Indiana, Ohio and Kentucky; I-75 does not run through Indiana | ||
I-275 | 35.01[12][a] | 56.34 | I-75 near Monroe, MI | I-96, I-696 and M-5inFarmington Hills, MI | 01977-01-011977 | current | ||
I-375 | 1.06 | 1.71 | BS I-375inDetroit, MI | I-75 in Detroit, MI | 01964-01-011964 | current | Will be downgraded to a boulevard starting in 2025 | |
I-475 | 16.99 | 27.34 | I-75 near Grand Blanc, MI | I-75/US 23 near Mount Morris, MI | 01973-01-011973 | current | Runs east and north of Flint, MI | |
I-675 | 7.72 | 12.42 | I-75/US 23 near Saginaw, MI | I-75/US 23 near Zilwaukee, MI | 01971-01-011971 | current | ||
I-475 | 20.37 | 32.78 | I-75inPerrysburg, OH | I-75 in Toledo, OH | 01964-01-011964 | current | ||
I-675 | 26.53 | 42.70 | I-75 near Miamisburg, OH | I-70 near Medway, OH | 01987-01-011987 | current | ||
I-175 | — | — | I-75inChattanooga, TN | I-75inLexington, KY | — | — | ||
I-275 | 2.98 | 4.80 | I-40inKnoxville, TN | I-75/I-640 in Knoxville, TN | 01982-01-011982 | current | ||
I-475 | — | — | I-40/I-75 near Knoxville, TN | I-75 near Knoxville, TN | 01990-07-231990 | — | Canceled due to local opposition and high construction costs | |
I-676 | 6.90 | 11.10 | I-76/US 30inPhiladelphia, PA | I-76 in Camden, NJ | 01991-01-011991 | current | ||
I-176 | 11.33 | 18.23 | I-76/Pennsylvania TurnpikeinMorgantown, PA | US 422 near Reading, PA | 01964-01-011964 | current | ||
I-276 | 29.78 | 47.93 | I-76inKing of Prussia, PA | I-95/I-295inBristol Township, PA | 01964-01-011964 | current | ||
I-376 | 84.42 | 135.86 | I-80 near Hermitage, PA | I-76/US 22inMonroeville, PA | 01972-01-011972 | current | ||
I-476 | 129.61 | 208.59 | I-95 near Chester, PA | I-81/US 6/US 11 near Clarks Summit, PA | 01992-01-011992 | current | ||
I-876 | 1.57 | 2.53 | PA 885inPittsburgh, PA | I-279/PA 28 in Pittsburgh, PA | 01970-01-011970 | 01971-01-011971 | Short lived renumbering of I-479, now I-579 | |
I-277 | 4.46 | 7.18 | I-77/US 21/US 74/NC 27inCharlotte, NC | I-77/US 21/NC 16 in Charlotte, NC | 01981-01-011981 | current | Partial loop around Uptown Charlotte | |
I-277 | 4.14 | 6.66 | I-76inAkron, OH | I-77 in Akron, OH | 01970-01-011970 | current | ||
I-178 | — | — | — | — | — | 01971-01-011971 | Canceled | |
I-378 | — | — | — | — | 01968-01-011968 | 01971-01-011971 | Replaced by PA Route 378 | |
I-278 | 35.62 | 57.32 | US 1/9inLinden, NJ | Bruckner InterchangeinBronx, NY | 01961-01-011961 | current | Does not intersect with parent route I-78 | |
I-478 | 2.14 | 3.44 | I-278inBrooklyn, NY | NY 9AinManhattan, NY | 01971-01-011971 | current | Unsigned; does not intersect with parent route I-78 | |
I-678 | 14.33 | 23.06 | John F. Kennedy International AirportinQueens, NY | Bruckner InterchangeinBronx, NY | 01965-01-011965 | current | Does not intersect with parent route I-78 | |
I-878 | 0.70 | 1.13 | I-678 in Queens, NY, near John F. Kennedy International Airport | JFK Expressway in Queens, NY, near JFK Airport | 01970-01-011970 | current | Unsigned; does not intersect with parent route I-78; eastbound only | |
I-179 | — | — | McKean Township, PA | Erie, PA | 01958-01-011958 | 01968-01-011968 | Replaced by its parent route, I-79 | |
I-279 | 13.32 | 21.44 | I-376/US 22/US 30inPittsburgh, PA | I-79inFranklin Park, PA | 01972-01-011972 | current | ||
I-479 | 1.57 | 2.53 | PA 885inPittsburgh, PA | I-279/PA 28 in Pittsburgh, PA | 01966-01-011966 | 01970-01-011970 | Early number for I-579 | |
I-579 | 1.57 | 2.53 | PA 885inPittsburgh, PA | I-279/PA 28 in Pittsburgh, PA | 01971-01-011971 | current | ||
I-180 | — | — | US 101inSan Rafael, CA | I-80 near Berkeley, CA | 01978-01-011978 | 01991-01-011991 | Temporary designation of what was formerly part of SR 17, now part of I-580 | |
I-280 | 57.22 | 92.09 | I-680/US 101inSan Jose, CA | King Street in San Francisco, CA | 01964-01-011964 | current | ||
I-238 | 2.23 | 3.59 | I-880inSan Leandro, CA | I-580/SR 238inCastro Valley, CA | 01983-01-011983 | current | Considered an auxiliary route of I-80 in California; there is no I-38 | |
I-380 | 1.671 | 2.689 | I-280inSan Bruno, CA | US 101 in San Bruno, CA | 01964-01-011964 | current | ||
I-480 | — | — | I-80inSan Francisco, CA | Sansome Street in San Francisco, CA | 01957-01-011957 | 01968-01-011968 | Was to be the Embarcadero Freeway; downgraded to a state highway in 1968 and fully decommissioned in 1991 | |
I-580 | 75.63 | 121.71 | US 101inSan Rafael, CA | I-5 near Westley, CA | 01964-01-011964 | current | Segments were originally part of I-5W | |
I-680 | 70.52 | 113.49 | I-280/US 101inSan Jose, CA | I-80inCordelia, CA | 01955-01-011955 | current | Originally SR 21 | |
I-780 | 6.50 | 10.46 | I-80inVallejo, CA | I-680inBenicia, CA | 01955-01-011955 | current | Originally part of I-680 | |
I-880 | 47.22 | 75.99 | I-280/SR 17inSan Jose, CA | I-80/I-580inOakland, CA | 01983-01-011983 | current | Originally part of SR 17 | |
I-880 | — | — | I-80inWest Sacramento, CA | I-80 in Sacramento, CA | 01971-01-011971 | 01983-01-011983 | Now part of I-80 | |
I-980 | 2.03 | 3.27 | I-880inOakland, CA | I-580/SR 24 in Oakland, CA | 01981-01-011981 | current | ||
I-580 | 30.09 | 48.43 | US 50inCarson City, NV | I-80inReno, NV | 02012-01-012012 | current | Runs concurrently with US 395 | |
I-180 | 13.19 | 21.23 | IL 26/IL 71inHennepin, IL | I-80 near Princeton, IL | 01969-01-011969 | current | ||
I-280 | 26.98 | 43.42 | I-80 near Davenport, IA | I-74/I-80 near Colona, IL | 01990-01-011990 | current | ||
I-380 | 73.05 | 117.56 | I-80 near Iowa City, IA | US 218inWaterloo, IA | 01985-01-011985 | current | Connects Waterloo and Cedar Rapids, IA, with I-80 | |
I-480 | 4.90 | 7.89 | I-80/US 75inOmaha, NE | I-29/US 6inCouncil Bluffs, IA | 01966-01-011966 | current | ||
I-680 | 16.49 | 26.54 | I-80inOmaha, NE | I-29 near Crescent, IA | 01966-01-011966 | current | ||
I-880 | 16.57 | 26.67 | I-29 near Loveland, IA | I-80 near Neola, IA | 02019-01-012019 | current | Former section of I-680 | |
I-180 | 3.18 | 5.12 | US 34inLincoln, NE | I-80/US 34/US 77 in Lincoln, NE | 01965-01-011965 | current | ||
I-280 | — | — | I-80inOmaha, NE | I-29 near Crescent, IA | 01958-01-011958 | 01965-01-011965 | Redesignated as I-680 due to the I-280 already being planned in the Davenport, Iowa area | |
I-580 | 1.60 | 2.57 | I-480inOmaha, NE | Lake Street in Omaha, NE | 01976-01-011976 | 01982-01-011982 | Now part of US 75 due to the I-480 interchange not being up to interstate standards | |
I-280 | 17.85 | 28.73 | I-80inParsippany-Troy Hills, NJ | I-95/New Jersey TurnpikeinKearny, NJ | 01958-01-011958 | current | ||
I-280 | 12.41 | 19.97 | I-80/I-90/Ohio TurnpikeinLake Township, OH | I-75inToledo, OH | 01959-01-011959 | current | ||
I-380 | — | — | I-76/I-77inAkron, OH | I-271inMacedonia, OH | proposed | — | Proposed designation for SR 8 between Akron and Macedonia | |
I-480 | 41.77 | 67.22 | I-80/Ohio TurnpikeinNorth Ridgeville, OH | I-80/Ohio Turnpike in Streetsboro, OH | 01971-01-011971 | current | ||
I-680 | 16.43 | 26.44 | I-76/Ohio TurnpikeinNorth Lima, OH | I-80/SR 11 near Mineral Ridge, OH | 01964-01-011964 | current | ||
I-180 | 28.85 | 46.43 | US 15/US 220inWilliamsport, PA | I-80/PA 147 near Milton, PA | 01984-01-011984 | current | ||
I-180 | — | — | — | — | — | 01964-01-011964 | Original number for I-176 when I-76 was I-80S | |
I-280 | — | — | — | — | 01958-01-011958 | 01964-01-011964 | Now part of Pennsylvania Turnpike | |
I-380 | 24.76 | 39.85 | I-80inTunkhannock Township, PA | I-81/I-84/US 6inDunmore, PA | 01973-01-011973 | current | ||
I-480 | — | — | — | — | 01958-01-011958 | 01964-01-011964 | Early number for I-476 when I-76 was I-80S | |
I-680 | — | — | — | — | 01958-01-011958 | 01964-01-011964 | Original number for I-676 when I-76 was I-80S | |
I-180 | 1.09 | 1.75 | I-80inCheyenne, WY | I-80 Bus./US 30 in Cheyenne, WY | 01984-01-011984 | current | Built as a boulevard, not to Interstate Highway standards | |
I-281 | 9.45 | 15.21 | I-81inOnondaga, NY | New York State Thruway (I-90) in DeWitt, NY | — | 01970-01-011970 | Redesignated as I-481 on January 1, 1970 | |
I-481 | 15.04 | 24.20 | I-81inOnondaga, NY | I-81/NY 481inNorth Syracuse, NY | 01970-01-011970 | current | Will be decommissioned when I-81 is rerouted onto the freeway and the original I-81 routing becomes I-81 Business | |
I-781 | 4.30 | 6.92 | I-81inPamelia, NY | Fort Drum main gate in Le Ray, NY | 02012-01-012012 | current | ||
I-381 | 1.67 | 2.69 | SR 381inBristol, VA | I-81 in Bristol, VA | 01961-01-011961 | current | ||
I-581 | 6.64 | 10.69 | US 220/SR 24inRoanoke, VA | I-81 near Hollins, VA | 01955-01-011955 | current | ||
I-181 | 23.85 | 38.38 | US 321/SR 67inJohnson City, TN | US 11W/SR 1inKingsport, TN | 01985-01-011985 | 02007-01-012007 | Now part of I-26 | |
I-182 | 15.19 | 24.45 | I-82/US 12 near Richland, WA | US 12/US 395inPasco, WA | 01969-01-011969 | current | Completely concurrent with US 12 | |
I-283 | 2.91 | 4.68 | I-76/Pennsylvania Turnpike near Highspire, PA | I-83/US 322/Capital Beltway near Harrisburg, PA | 01972-01-011972 | current | ||
I-184 | 3.62 | 5.83 | I-84inBoise, ID | US 20/US 26 in Boise, ID | 01990-01-011990 | current | ||
I-384 | 8.20 | 13.20 | I-84/US 6inEast Hartford, CT | US 6/US 44inBolton, CT | 01984-01-011984 | current | ||
I-684 | 28.47 | 45.82 | I-287 near White Plains, NY | NY 22 near Brewster, NY | 01974-01-011974 | current | Original routing of I-87; also crosses into Connecticut | |
I-685 | 14.00 | 22.53 | I-65 in downtown Montgomery, AL | I-85 in Montgomery, AL | proposed | — | Future designation for I-85 in Montogomery once the Montgomery Outer Loop is completed and I-85 is routed onto it | |
I-185 | 49.30 | 79.34 | US 27/US 280/SR 520inColumbus, GA | I-85 near LaGrange, GA | 01979-01-011979 | current | ||
I-285 | 63.98 | 102.97 | Beltway around Atlanta, GA | 01969-01-011969 | current | |||
I-485 | 5.9 | 9.5 | I-75/I-85inAtlanta, GA | I-85 in Atlanta, GA | 01964-01-011964 | 01975-01-011975 | Completed section now the Freedom Parkway, was planned to relieve traffic along Downtown Connector (I-75/85) through downtown Atlanta | |
I-985 | 24.04 | 38.69 | I-85 near Buford, GA | SR 369 near Gainesville, GA | 01985-01-011985 | current | ||
I-285 | 22.8 | 36.7 | I-85/I-85 Bus./US 29/US 52/US 70 near Lexington, NC | I-40/US 52/US 311/NC 8inWinston-Salem, NC | 02018-01-012018 | current | An unconfirmed section of Future I-285 is to continue north of I-40 for 10 miles (16 km) along US 52, through downtown Winston-Salem, to the proposed Winston-Salem Northern Beltway.[15][16] | |
I-485 | 66.68 | 107.31 | Beltway around Charlotte, NC | 01988-01-011988 | current | |||
I-685 | — | — | Greensboro, NC | Dunn, NC | proposed | — | Future designation that will run concurrently with US 421 once the latter route is upgraded to interstate standards | |
I-785 | 7.00 | 11.27 | I-40/I-85/I-840/I-85 Bus.inGreensboro, NC | US 70 in Greensboro, NC | 02013-01-012013 | current | Future northern terminus at US 29/US 58/US 360/US 58 Bus.inDanville, VA | |
I-885 | 8.566 | 13.786 | I-40/NC 885inResearch Triangle Park, NC | I-85/US 70/US 15inDurham, NC | 02022-01-012022 | current | ||
I-185 | 17.70 | 28.49 | I-385 near Mauldin, SC | US 29inGreenville, SC | 01955-01-011955 | current | ||
I-385 | 42.16 | 67.85 | I-26 near Clinton, SC | US 276inGreenville, SC | 01962-01-011962 | current | ||
I-585 | 2.25 | 3.62 | US 176/US 221/SC 9inSpartanburg, SC | I-85 Bus./US 176 near Spartanburg, SC | 01962-01-011962 | current | Does not connect to I-85 | |
I-587 | 55.9 | 90.0 | I-87/US 64 near Zebulon, NC | US 264 near Greenville, NC | 02022-01-012022[17] | current | Former section of US 264; does not currently connect to I-87 | |
I-287 | 98.72 | 158.87 | I-95/New Jersey Turnpike/Route 440inEdison, NJ | I-95inRye, NY | 01961-01-011961 | current | ||
I-187 | — | — | I-287/New York State ThruwayinGreenburgh, NY | I-95inRye, NY | 01957-01-011957 | 01958-01-011958 | Original designation for the Cross-Westchester Expressway; it was signed as I-487 when it opened | |
I-487 | — | — | I-287/New York State ThruwayinGreenburgh, NY | I-95inRye, NY | 01958-01-011958 | 01961-01-011961 | Original signed designation for the Cross-Westchester Expressway; it was replaced by an extension of I-287 | |
I-487 | — | — | I-87/I-287/New York State ThruwayinTarrytown, NY | I-84inBeacon, NY | 01965-01-011965 | 01971-01-011971 | Known as the Hudson River Expressway; the project was cancelled and the only portion to be constructed and opened is now the Croton Expressway | |
I-587 | 1.21 | 1.95 | I-87/New York State Thruway/NY 28inKingston, NY | NY 28/NY 32 in Kingston, NY | 01960-01-011960 | current | ||
I-687 | 9.10 | 14.65 | I-90/New York State ThruwayinColonie, NY | I-90inAlbany | — | 01973-01-011973 | Also known as the Albany Airport Connector; the project was cancelled in the face of local opposition | |
I-787 | 10.16 | 16.35 | I-87/New York State ThruwayinAlbany, NY | NY 7inGreen Island, NY | 01968-01-011968 | current | ||
I-189 | 1.49 | 2.40 | US 7inSouth Burlington, VT | I-89 in South Burlington, VT | 01980-01-011980 | current | ||
I-190 | 3.07 | 4.94 | O'Hare International AirportinChicago, IL | I-90 in Chicago, IL | 01978-01-011978 | current | ||
I-290 | 29.84 | 48.02 | I-90/IL 53inRolling Meadows, IL | I-90/I-94/Ida B. Wells DriveinChicago, IL | 01972-01-011972 | current | ||
I-490 | — | — | I-294inFranklin Park, IL | I-90inDes Plaines, IL | proposed | — | Proposed route number for the O'Hare West Bypass[18] | |
I-190 | 19.26 | 31.00 | I-290inWorcester, MA | Route 2inLeominster, MA | 01983-01-011983 | current | ||
I-290 | 20.16 | 32.44 | I-395inAuburn, MA | I-495inMarlborough, MA | 01970-01-011970 | current | ||
I-190 | 28.34 | 45.61 | I-90/New York State ThruwayinCheektowaga, NY | Highway 405atLewiston, NY | 01959-01-011959 | current | ||
I-290 | 9.80 | 15.77 | I-190inTonawanda, NY | I-90/New York State ThruwayinWilliamsville, NY | 01964-01-011964 | current | ||
I-390 | 76.06 | 122.41 | I-86/NY 17inAvoca, NY | I-490inGates, NY | 01973-01-011973 | current | ||
I-490 | 37.40 | 60.19 | I-90/New York State ThruwayinBergen, NY | I-90/New York State Thruway in Victor, NY | 01970-01-011970 | current | ||
I-590 | 5.31 | 8.55 | I-390inBrighton, NY | I-490/NY 590inRochester, NY | 01980-01-011980 | current | ||
I-690 | 14.19 | 22.84 | I-90/New York State Thruway/NY 690inVan Buren, NY | I-481inEast Syracuse, NY | 01962-01-011962 | current | ||
I-790 | 2.41 | 3.88 | I-90/New York State ThruwayinDeerfield, NY | NY 5A/NY 55inUtica, NY | 01961-01-011961 | current | ||
I-890 | 9.35 | 15.05 | I-90/New York State ThruwayinRotterdam, NY | I-90/New York State Thruway in Guilderland, NY | 01962-01-011962 | current | ||
I-990 | 6.35 | 10.22 | I-290inAmherst, NY | NY 263 near Lockport, NY | 01985-01-011985 | current | Highest numbered Interstate in the Interstate system | |
I-490 | 2.43 | 3.91 | I-71/I-90inCleveland, OH | East 55th Street in Cleveland, OH | 01990-01-011990 | current | ||
I-190 | 1.72 | 2.77 | I-90inRapid City, SD | US 16 in Rapid City, SD | 01962-01-011962 | current | ||
I-291 | 6.02 | 9.69 | I-91inWindsor, CT | I-84inManchester, CT | 01994-01-011994 | current | ||
I-691 | 8.38 | 13.49 | I-84 at the Southington-Cheshire, CT town line | I-91inMeriden, CT | 01988-01-011988 | current | ||
I-291 | 5.44 | 8.75 | I-91inSpringfield, MA | I-90/Massachusetts TurnpikeinChicopee, MA | 01972-01-011972 | current | ||
I-391 | 4.46 | 7.18 | I-91inChicopee, MA | High Street in Holyoke, MA | 01970-01-011970 | current | ||
I-293 | 11.18 | 17.99 | I-93/NH 101inManchester, NH | I-93/Everett TurnpikeinHooksett, NH | 01976-01-011976 | current | ||
I-393 | 4.60 | 7.40 | I-93inConcord, NH | NH 9inPembroke, NH | 01979-01-011979 | current | ||
I-294 | 53.42 | 85.97 | I-80/I-94inSouth Holland, IL | I-94 in Deerfield, IL | 01968-01-011968 | current | ||
I-194 | 3.38 | 5.44 | I-94inBattle Creek, MI | M-66 in Battle Creek, MI | 01961-01-011961 | current | ||
I-394 | 9.75 | 15.69 | I-494/US 12inMinnetonka, MN | 4th Street in Minneapolis, MN | 01991-01-011991 | current | ||
I-494 | 42.94 | 69.11 | I-94/I-694inMaple Grove, MN | I-94/I-694 in Woodbury, MN | 01985-01-011985 | current | Western and southern half of the Minneapolis–St. Paul beltway | |
I-694 | 30.77 | 49.52 | I-94/I-494inMaple Grove, MN | I-94/I-494 in Woodbury, MN | 01970-01-011970 | current | Northern and eastern half of the Minneapolis–St. Paul beltway | |
I-194 | 1.20 | 1.93 | McKenzie Drive near Bismarck, ND | I-94 near Mandan, ND | 01958-01-011958 | current | Unsigned | |
I-794 | 3.75 | 6.04 | I-43/I-94inMilwaukee, WI | WIS 794 in Milwaukee, WI | 01980-01-011980 | current | ||
I-894 | 9.92 | 15.96 | I-41/I-94inMilwaukee, WI | I-41/I-43/I-94 in Milwaukee, WI | 01966-01-011966 | current | Completely concurrent with I-41 | |
I-395 | 66.60 | 107.18 | I-95inEast Lyme, CT | I-290inAuburn, MA | 01983-01-011983 | current | ||
I-295 | 92.30 | 148.54 | I-95/I-495inNew Castle, DE | I-95inBristol Township, PA | 01994-01-011994 | current | Extended into Pennsylvania in 2018 | |
I-495 | 11.47 | 18.46 | I-95/I-295inNewport, DE | I-95inLower Chichester Township, PA | 01977-01-011977 | current | ||
I-895 | 10.78 | 17.35 | Newport, Delaware | Claymont, Delaware | 01979-01-011979[19] | 01980-01-011980[20] | Now part of I-95 | |
I-195 | 2.41 | 3.88 | I-395inWashington D.C. | US 50inWashington D.C. | proposed | — | Currently I-395; I-395 will be rerouted onto I-695 | |
I-395 | 13.39 | 21.55 | I-95/I-495inSpringfield, VA | US 50inWashington, DC | 01977-01-011977 | current | Original route of I-95 that was proposed to continue through Washington, DC | |
I-495 | 64 | 103 | Beltway around Washington, DC | 01961-01-011961 | current | Capital Beltway; runs through Virginia, Maryland and a small sliver of Washington, DC, over the Wilson Bridge | ||
I-695 | 2.00 | 3.22 | I-395inWashington, DC | I-295 in Washington, DC[21] | 01958-01-011958 | current | Unsigned until 2011; future plans call for the route number to be replaced by an extension of I-395 | |
I-195 | 4.42 | 7.11 | I-95/SR 112inMiami, FL | SR 905inMiami Beach, FL | 01961-01-011961 | current | ||
I-295 | 61.04 | 98.23 | Beltway around Jacksonville, FL | 01970-01-011970 | current | |||
I-395 | 1.29 | 2.08 | I-95inMiami, FL | MacArthur CausewayatWatson Island, Miami, FL | 01971-01-011971 | current | ||
I-595 | 12.86 | 20.70 | I-75/SR 869inWeston, FL | US 1inFort Lauderdale, FL | 01990-01-011990 | current | ||
I-795 | 7.4 | 11.9 | I-95 south of Jacksonville, FL | I-295 in Jacksonville, FL | proposed | — | Currently signed as SR 9B pending approval of the interstate designation from the AASHTO | |
I-195 | 1.55 | 2.49 | I-95/Maine TurnpikeinSaco, ME | SR 5 in Saco, ME | 01980-01-011980 | current | ||
I-295 | 53.11 | 85.47 | I-95/Maine TurnpikeinScarborough, ME | I-95/Maine Turnpike in Gardiner, ME | 01960-01-011960 | current | ||
I-395 | 4.99 | 8.03 | I-95/US 2/SR 100inBangor, ME | US 1AinBrewer, ME | 02008-01-012008 | current | ||
I-495 | 3.70 | 5.95 | I-95/Maine TurnpikeinPortland, ME | I-295/US 1inFalmouth, ME | 02004-01-012004 | current | Unsigned | |
I-195 | 4.71[22] | 7.58 | I-95/MD 166 near Catonsville, MD | Baltimore-Washington International Airport | 01990-01-011990 | current | ||
I-395 | 1.98 | 3.19 | I-95 in South Baltimore, MD | West Pratt Street in Baltimore, MD | 01981-01-011981 | current | ||
I-595 | 19.97 | 32.14 | I-95/I-495/US 50 near Washington, DC | US 50/US 301/MD 70inAnnapolis, MD | 02011-01-012011 | current | Unsigned designation for US 50 | |
I-695 | 30.57 | 49.20 | Beltway around Baltimore, MD | 01958-01-011958 | current | |||
I-795 | 8.99 | 14.47 | I-695inPikesville, MD | MD 140inReisterstown, MD | 01985-01-011985 | current | ||
I-895 | 11.44 | 18.41 | I-95 near Elkridge, MD | I-95 in Baltimore, MD | 01979-01-011979 | current | ||
I-295 | 8.05 | 12.96 | I-95/I-495 near Forest Heights, MD | I-695inWashington, DC | 01964-01-011964 | current | ||
I-195 | 44.55 | 71.70 | I-95inProvidence, RI | I-495/Route 25inWareham, MA | 01958-01-011958 | current | ||
I-295 | 26.58 | 42.78 | I-95inWarwick, RI | I-95inAttleboro, MA | 01969-01-011969 | current | ||
I-495 | 121.56 | 195.63 | I-195/Route 25inWareham, MA | I-95inSalisbury, MA | 01957-01-011957 | current | ||
I-695 | — | — | I-95inRoxbury, MA | I-93 in Charlestown, MA | 01955-01-011955 | 01971-01-011971 | Canceled; was to have been built in connection with a planned alignment of I-95 through downtown Boston | |
I-895 | — | — | Route 37/I-295inCranston, RI | I-95/I-295inAttleboro, MA | 01968-01-011968 | 01982-01-011982 | Canceled; would have supplemented I-295 to create a full Beltway around Providence, RI | |
I-195 | 34.17 | 54.99 | I-295inHamilton Township, NJ | Route 34inWall Township, NJ | 01968-01-011968 | current | ||
I-895 | — | — | I-295inBurlington, NJ | I-95inBristol, PA | 01963-01-011963 | 01981-01-011981 | Never built | |
I-295 | 9.79 | 15.76 | NY 25/NY 24inQueens, NY | Bruckner InterchangeinBronx, NY | 01970-01-011970 | current | ||
I-495 | 71.02 | 114.30 | Queens Midtown TunnelinManhattan, NY | CR 58inRiverhead, NY | 01958-01-011958 | current | ||
I-695 | 1.77 | 2.85 | I-95inBronx, NY | I-295 in Bronx, NY | 01986-01-011986 | current | ||
I-895 | 1.12 | 1.80 | I-278inBronx, NY | I-95 in Bronx, NY | 01970-01-011970 | 02017-01-012017[23] | Downgraded to a boulevard and designated as NY 895 | |
I-295 | 34.0 | 54.7 | Cliffdale Road in Fayetteville, NC | I-95 and US 13 near Eastover, NC | 02019-01-012019 | current | Unfinished Fayetteville Outer Loop; expected to be completed in its entirety in Summer 2026 | |
I-495 | 4.10 | 6.60 | I-440/US 64/US 64 Bus.inRaleigh, NC | I-540/US 64/US 264inKnightdale, NC | 02013-01-012013 | 02017-01-012017 | Now part of I-87 | |
I-795 | 25.46 | 40.97 | US 70/US 117inGoldsboro, NC | I-95/US 264inWilson, NC | 02007-01-012007 | current | ||
I-695 | — | — | I-95 near Philadelphia International Airport | I-95 in Philadelphia, PA | 01964-01-011964 | 01977-01-011977 | Never built | |
I-195 | 3.24 | 5.21 | SR 195inRichmond, VA | I-64/I-95 in Richmond, VA | 01970-01-011970 | current | ||
I-295 | 52.56 | 84.59 | I-95 near Petersburg, VA | I-64 near Short Pump, VA | 01980-01-011980 | current | ||
I-595 | — | — | I-395 near Arlington, VA | US 1atRonald Reagan Washington National Airport | — | — | Now part of US 1 | |
I-895 | — | — | I-95 near Richmond, VA | I-295 near Richmond, VA | 01996-01-011996 | 02002-01-012002 | Currently designated as SR 895, it was originally planned as an Interstate designation, but did not get approved by AASHTO | |
I-495 | — | — | — | — | 01956-01-011956 | 01958-01-011958 | Early number of I-476 | |
I-196 | 37.07[12] | 59.66 | US 31inNorton Shores, MI | I-96/US 16inGrand Rapids, MI | 01959-01-011959 | 01963-01-011963 | Now the western end of I-96 | |
I-196 | 80.65 | 129.79 | I-94/US 31 near Benton Harbor, MI | I-96/M-37inGrand Rapids, MI | 01963-01-011963 | current | ||
I-296 | 3.43 | 5.52 | I-196inGrand Rapids, MI | I-96/M-37inWalker, MI | 01962-01-011962 | current | Unsigned since 1979 | |
I-496 | 11.78 | 18.96 | I-69/I-96 near Lansing, MI | I-96 and US 127 near Lansing, MI | 01970-01-011970 | current | ||
I-696 | 29.39 | 47.30 | I-96/I-275 & M-5inNovi, MI | I-94inRoseville, MI | 01989-01-011989 | current | ||
I-197 | 3.44 | 5.54 | — | — | — | 01980-01-01c. 1980 | Replaced by I-595 | |
I-297 | — | — | — | — | — | 01987-01-011987 | Withdrawn from request, replaced by MD 3 | |
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Primary Interstate Highways
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Unsigned |
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Lists |
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Other |
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Routes in italics are no longer a part of the system. Major Interstates are highlighted. |