List of auxiliary Interstate Highways

Dwight D. Eisenhower National System of Interstate and Defense Highways

Interstate 295 marker

Highway shield for Interstate 295

Interstate Highways in the 48 contiguous states
System information
Formed: June 29, 1956[1]
Highway names
Interstates: Interstate X (I-X)
System links

The auxiliary Interstate Highways (also called three-digit Interstate Highways) are a supplemental subset of the freeways within the Interstate Highway System of the United States. Similar to the mainline Interstate Highways, these highways also meet all Interstate Highway Standards, they receive the same percentage of federal funding (90%), and they comply with other federal standards.

Auxiliary routes are generally classified as spur routes (which connect to the parent route at one end), bypasses (which connect to the parent route at both ends), or beltways, which form a complete circle intersecting the parent route at two locations. There are some routes which connect to the parent route at one end, but connect to another route at the other end; some states treat these as spurs while others treat these as bypasses.

These shorter auxiliary routes branch off of main routes and are numbered based on the number of the parent route, such that all I-x95 routes are supplemental routes for I-95. While some exceptions do exist, generally 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 may repeat in each state along their route, but they will not repeat within a state.

Terminology and guidelines

Routes that begin with an even number generally connect to the main highway in two locations, while odd numbers only connect in one location.

The basic tenets of the auxiliary Interstates are divided into three branches: spur, loop, and bypass routes. Each one signifies a different characteristic of the auxiliary route.

The first digit of the three digits usually determines 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), and this 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.

Numerous exceptions to the standard numbering guidelines exist in many places. This can be 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 there are none available, causing a "non-standard" number to be used.

Spur route

An Interstate Highway spur route's number usually has an odd number for its first digit.[2] It is usually one of the following:

Examples of Interstate Highway spur routes are listed below.

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 are listed below.

Bypass

A bypass 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 of bypass routes are listed below.

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.

Beltway

A beltway (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, 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 are listed include:

Auxiliary Interstates

This list is incomplete; you can help by expanding it.
Number Length (mi)[3] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
H-201 4.106.60 H-1 in HalawaH-1 in Honolulu 1989[4]current Signed as Route 78 until 2004
I-105 17.3227.87 SR 1 in El SegundoI-605 in Norwalk 1963current Replaced segments of SR 42
I-205 12.9720.87 I-580 near TracyI-5 near Tracy 1970current
I-305 6.009.66 I-80 in West SacramentoI-80 Bus/US 50/SR 99 in Sacramento 1981current Unsigned
I-405 72.15116.11 I-5 in IrvineI-5 in Mission Hills 1964current
I-505 32.9853.08 I-80 in VacavilleI-5 in Dunnigan 1977current Originally part of Interstate I-5W
I-605 27.4044.10 I-405 in Seal BeachI-210 in Irwindale 1964current
I-805 28.0245.09 I-5 in San YsidroI-5 in Sorrento Valley 1959current
I-905 8.96[5]14.42 I-5 in San YsidroFed. 2 at the United States-Mexico border in Otay Mesa proposed Currently SR 905, proposed to be signed as an Interstate
I-105 3.495.62 OR 99 in EugeneI-5 in Springfield 2011current
I-405 3.535.68 I-5 in PortlandI-5 in Portland 1950current
I205 36.6458.97 I-5 in Tualatin, ORI-5 in Salmon Creek, WA 1975current
I405 30.3048.76 I-5/SR 518 in TukwilaI-5/SR 525 in Lynnwood 1964current
I605 proposed Proposed to bypass Seattle
I705 1.502.41 I-5/SR 7 in Tacoma 1990current Schuster Parkway in Tacoma
I-110 20.4332.88 SR 47 in San Pedro, Los AngelesI-10/SR 110 in Los Angeles 1978current Originally part of US 66, then signed as SR 11
I-210 48.7278.41 I-5 in SylmarSR 57/SR 210 in Glendora 1964current Segment from SR 57 east to I-10 is still signed as the state highway SR 210, formerly SR 30 prior to 2007.
I-710 19.6631.64 Terminal Island in Long BeachValley Boulevard in Alhambra 1983current Originally signed as SR 7
I-110 6.9411.17 US 98 Bus near PensacolaI-10 near Pensacola 1969current
I-110 8.8914.31 I-10 in Baton RougeUS 61 in Baton Rouge 1965current
I-210 12.4019.96 I-10 near SulphurI-10 in Lake Charles 1962current
I-310 11.2518.11 US 90 in BoutteI-10 near Kenner 1993current
I-510 5.108.21 LA 47 in New OrleansI-10 in New Orleans 1992current
I-610 4.527.27 I-10 at the Orleans-Jefferson ParishI-10 in New Orleans 1956current
I-910 9.7015.61 US 90 Bus in MarreroI-10 in New Orleans 1999current Unsigned
I-110 4.106.60 US 90 in BiloxiI-10 in D'Iberville 1988current
I-310 US 90 near the Port of GulfportI-10 in Gulfport proposed Future spur into Gulfport, MS
I-110 0.921.48 Av Abraham Lincoln at the United States-Mexico border in El PasoI-10 in El Paso 1967current Shortest signed Interstate in the country
I-410 49.4979.65 Beltway around San Antonio 1959current
I-610 37.9761.11 Beltway around Houston 1975current
I-215 54.5087.71 I-15 in MurrietaI-15 in Devore 1982current Originally signed as I-15E, then SR 215
I115 1.191.92 I-15/I-90 in ButteIron Street in Butte 1971current
I315 0.831.34 I-15 in Great FallsI-15 Bus/US 89 in Great Falls 1960current Unsigned
I215 11.1017.86 I-15/Clark County Route 215 near ParadiseI-515/US 93/SR 564 in Henderson 1996current
I515 20.5433.06 US 93/US 95 in HendersonI-15/US 93/US 95 in Las Vegas 1976current Not signed until 1994
I-215 29.0246.70 I-80 in Salt Lake CityI-15 in North Salt Lake 1963current
I516 6.4910.44 SR 21/SR 204 in SavannahSR 21 in Garden City 1985current
I520 16.1425.97 I-20 in Augusta, GAI-20 in North Augusta, SC 1980current
I-220 17.6228.36 I-20 in ShreveportI-20 in Bossier City 1991current
I-220 12.0119.33 I-20 in JacksonI-55 in Ridgeland 1981current
I-820 35.1756.60 I-20 in Fort WorthI-20 / US 287 in Fort Worth 1959current
I222 I-22 near Birmingham, ALInterstate 422 near Birmingham, AL proposed
I422 I-20/I-59/I-459/US 11 in BessemerI-59 in Argo proposed
I-124 1.973.17 I-24 in ChattanoogaUS 27 in Chattanooga 1960current Unsigned
I-225 12.0019.31 I-25 in DenverI-70 in Aurora 1976current
I-126 3.685.92 I-26 in ColumbiaUS 21/US 76/US 176/US 321 in Columbia 1961current
I-526 19.2631.00 US 17 in CharlestonI-526 Bus/US 17 in Mount Pleasant 1989current
I-129 3.485.60 US 20/US 75/US 77 in South Sioux City, NEI-29/US 20/US 75 in Sioux City, IA 1976current
I-229 14.9724.09 I-29 in St. JosephI-29/US 59/US 71 in St. Joseph 1986current
I-229 11.3318.23 I-29 in Sioux FallsI-90 near Sioux Falls 1966current
I-130 proposed Proposed route in Texarkana
I-430 12.9320.81 I-30/US 67 in Little RockI-40/US 65 in Little Rock 1980current
I-530 46.6575.08 US 65 in Pine BluffI-30/I-440 in Little Rock 1999current
I-630 7.4011.91 I-430 near Little RockI-30 in Little Rock 1985current
I-235 13.7822.18 I-35/I-80 in West Des MoinesI-35/I-80 near Des Moines 1961current
I-135 95.74154.08 Kan. Tpk./I-35 in WichitaI-70/US 81 in Salina 1976current
I-235 16.5226.59 I-135/US 81 in WichitaI-135/US 81/K-15/K-254 in Wichita 1965current
I-335 50.1380.68 I-35/Kan. Tpk./US 50 in EmporiaI-470/Kan. Tpk. in Topeka 1987current
I-435 80.81130.05 Beltway around Kansas City, KS and Kansas City, MO 1965current
I-635 8.9014.32 I-35 in Overland Park, KSI-29/US 71 in Kansas City, MO 1968current
I-335 2.74[6]4.41 I-94 in MinneapolisI-35W in Minneapolis 19641978 Cancelled
I-535 2.784.47 I-35/US 53 in Duluth, MNUS 53/WIS 35 in Superior, WI 1971current
I235 5.368.63 I-35/I-40 in Oklahoma CityI-44 in Oklahoma City 1989current
I-635 37.0059.55 SH 121 in GrapevineI-20 in Balch Springs 1959current
I-238 2.233.59 I-880 in San Leandro, CAI-580/SR 238 in Castro Valley, CA 1983current Considered an auxiliary route of I-80 in California; there is no I-38
I-440 9.9616.03 I-30/I-530 near Little RockI-40/AR 440 near Little Rock 2003current
I-540 15.8725.54 US 271/AR 253 near Fort SmithUS 62/US 71 in Bentonville 1965current
I140 6.7910.93 US 17/US 421 near NavassaI-40/US 17 in Wilmington 2008current
I240 9.5415.35 I-26/I-40/US 74 near AshevilleI-40/US 74A in Asheville 1980current
I440 16.7726.99 I-40/US 1/US 64 near CaryI-40 near Raleigh 1991current
I540 25.8441.59 I-40 near DurhamI-495/US 64/US 264 near Knightdale 1997current
I840 5.779.29 I-40/I-73/US 421 in GreensboroI-40/I-85/I-785/I-85 Bus. in Greensboro 2011current
I240 16.2226.10 I-44/US 62 in Oklahoma CityI-40/US 270 in Oklahoma City 1965current
I-140 11.1717.98 I-40 near FarragutUS 129 near Alcoa 1987current
I-240 19.2731.01 I-40 in MemphisI-40 in Memphis 1970current
I-440 7.6412.30 I-40 in NashvilleI-24 in Nashville 1987current
I-640 7.0311.31 I-40 in KnoxvilleI-40 in Knoxville 1982current
I-840 77.28[7]124.37 I-40 near DicksonI-40 near Lebanon 2016current
I244 15.7525.35 I-44 in TulsaI-44 in Tulsa 1970current
I444 2.514.04 I-244 in TulsaI-244 in Tulsa 1970current Unsigned
I-345 1.402.25 I-30/I-45 in Dallas, TXUS 75 in Dallas, TX 1973current Unsigned
I-555 49.880.1 I-55 in TurrellAR 91 in Jonesboro 2016current
I-155 32.1351.71 I-74 in MortonI-55 in Lincoln 1992current
I-255 30.8249.60 I-55/I-270 in Mehlville, MOI-270/IL 255 in Pontoon Beach, IL 1986current
I-355 32.5152.32 I-80 in New LenoxI-290 in Itasca 1989current
I-155 15.9325.64 I-55 near Hayti, MOUS 51 at Dyersburg, TN 1980current
I359 2.303.70 I-20/I-59 in southern Tuscaloosa15th Street in downtown Tuscaloosa 1983current
I459 32.8052.79 I-20/I-59 in BessemerI-59 in Trussville 1984current
I759 4.507.24 I-59 in AttallaUS-411/SR-759 in Gadsden 1986current
I-164 0.691.11 US 41/Veterans Memorial Parkway in Evansville, INI-69 in Evansville, IN 1990current Unsigned, formerly 21.39 mi (34.42 km);[8] majority of former routing now part of I-69[9]
I-264 22.9336.90 I-64 in LouisvilleI-71 in Louisville 1956current
I264 25.0740.35 I-64/I-664 in ChesapeakeParks Ave in Virginia Beach 1960current
I464 4.717.58 I-64 in ChesapeakeI-264 in Norfolk 1960current
I564 3.034.88 SR 337I-64 in Norfolk 1970current
I664 20.2132.52 I-64/I-264 in NorfolkI-64 in Hampton 1971current
I165 4.907.89 US-43 in MobileI-65 in Mobile 1994current
I565 21.4034.44 I-65/US-72/SR-20 in DecaturUS-72 in Huntsville 1991current
I-265 6.7310.83 I-64 in New Albany, INSR 62/SR 265 in Clarksville, IN 1977current To be connected with I-265 in Kentucky in late 2016 with the completion of the East End Bridge
I-465 52.7984.96 Beltway around Indianapolis 1970current
I-865 4.727.60 I-65 near IndianapolisI-465 near Indianapolis 2002current
I-265 24.4839.40 I-65/KY 841 in Heritage CreekI-71/KY 841 in Prospect 1977current To be connected with I-265 in Indiana in late 2016 with the completion of the East End Bridge
I-469 30.8349.62 I-69 in Fort WayneI-69 in Fort Wayne 1995current
I-369 Future I-69/Pennyrile Parkway in HendersonUS 60 in Owensboro proposed
I-269 4.206.76 I-55/I-69 in Hernando, MSI-69 in Millington, TN 2015current Currently under construction; partially open
I-169 Union City, TNMartin, TN proposed
I-169 1.502.41 I-69E/US 77/US 83 in OlmitoPort of Brownsville main entrance in Brownsville 2015current Currently under construction; partially open and co-signed with SH 550
I-369 3.505.63 TenahaTexarkana, Texas 2013current Partially completed in 2013
I-270 5.318.55 I-25/US 36 at WelbyI-70/US 36 at Denver 1965current
I-270 50.5981.42 I-55/I-255 in Mehlville, MOI-55/I-70 near Troy, IL 1956current
I-470 13.7222.08 I-70 in TopekaI-70/Kan. Tpk. in Topeka 1960current
I-670 2.814.52 I-70 in Kansas City, KSI-70 in Kansas City, MO 1968current
I-170 2.33.7 I-70US 40 19691983 Cancelled
I-270 34.4055.36 I-70 near FrederickI-495 north of Bethesda 1975current
I-270 Spur 2.10[10]3.38 I-270 east of PotomacI-495 northwest of Bethesda
I-370 2.544.09 I-270 in GaithersburgMD 200 in Derwood 1988current
I-170 11.1717.98 I-64/US 40 in Richmond HeightsI-270 in Hazelwood 1956current
I-470 16.7226.91 I-49/I-435 in Kansas City, MOI-70 in Independence, MO 1983current
I-270 54.9788.47 Beltway around Columbus 1964current
I-470 6.6910.77 I-70 near Blaine, OHI-70 in Elm Grove, WV 1976current
I-670 9.3715.08 I-70 in ColumbusI-270 near Port Columbus International Airport 2003current
I-271 46.0674.13 I-71 near Medina, OHI-90 in Willoughby Hills, OH 1964current
I-471 5.759.25 I-275 near Newport, KYI-71 in Cincinnati, OH 1981current
I-172 19.6931.69 I-72 in Quincy, ILUS 24 in Quincy, IL 1995current
I-474 14.8823.95 I-74 in Peoria, ILI-74 in Morton, IL 1973current
I274 proposed Proposed route in Winston-Salem
I-175 1.442.32 I-275 in St. Petersburg, FLSR 687 in St. Petersburg, FL 1980current
I-275 60.6497.59 I-75 near MemphisI-75 in Wesley Chapel 1973current
I-375 1.342.16 I-275 in St. PetersburgUS 92 in St. Petersburg 1979current
I475 15.8325.48 I-75 in MaconI-75 in Macon 1965current
I575 30.9749.84 I-75 in KennesawSR 5 west of Nelson 1985current
I675 11.0417.77 I-75 in Stockbridge, GAI-285 southeast of Atlanta, GA 1987current
I-275 83.71134.72 Beltway around Cincinnati, OH 1962current Runs through Indiana, Ohio and Kentucky; I-75 does not run through Indiana
I-275 35.01[11][lower-alpha 1]56.34 I-75 near Monroe, MII-96, I-696 & M-5 in Farmington Hills 1977current
I-375 1.061.71 BS I-375 in Detroit, MII-75 in Detroit, MI 1964current
I-475 16.9927.34 I-75 near Grand Blanc, MII-75/US 23 near Mount Morris, MI 1973current Runs east and north of Flint, MI
I-675 7.7212.42 I-75/US 23 near Saginaw, MII-75/US 23 near Zilwaukee, MI 1971current
I-475 20.3732.78 I-75 in PerrysburgI-75 in Toledo 1964current
I-675 26.5342.70 I-75 near MiamisburgI-70 near Medway 1987current
I-275 2.984.80 I-40 in KnoxvilleI-75/I-640 in Knoxville 1982current
I-676 6.9011.10 I-76/US 30 in PhiladelphiaI-76 in Camden, NJ 1991current
I-176 11.3318.23 I-76/Penna Tpk. in MorgantownUS 422 near Reading 1964current
I-276 32.6552.55 I-76 in King of PrussiaDelaware River bridge (Pennsylvania-NJ state line)(current)
I-95/I-295 in Bristol Township (future)
1964current
I-376 78.70126.66 I-80 near HermitageI-76/US 22 in Monroeville 1972current
I-476 129.61208.59 I-95 near Chester, PAI-81 near Clarks Summit, PA 1992current Longest Auxiliary Interstate in the country
I-576 proposed Proposed Southern Beltway route from Pittsburgh International Airport to I-376
I277 4.467.18 Beltway around uptown Charlotte, NC 1981current
I-277 4.146.66 I-76 in AkronI-77 in Akron 1970current
I-278 35.6257.32 US 1/9 in Linden, New JerseyBruckner Interchange in Bronx, New York 1961current
I-478 2.143.44 I-278 in Brooklyn, New YorkNY 9A in Manhattan, New York 1971current Unsigned
I-678 14.3323.06 John F. Kennedy International Airport in Queens, New YorkBruckner Interchange in Bronx, New York 1965current
I-878 0.701.13 I-678 in Queens, New York near JFK AirportJFK Expressway in Queens, New York near JFK Airport 1970current Unsigned
I-279 13.3221.44 I-376/US 22/US 30 in PittsburghI-79 in Franklin Park 1972current
I-579 1.572.53 PA 885 in PittsburghI-279/PA 28 in Pittsburgh 1962current
I-180 US 101 in San RafaelI-80 near Berkeley 19781991 Temporary designation of what was formerly part of SR 17, now part of I-580.
I-280 57.2292.09 I-680/US 101 in San JoseKing Street in San Francisco 1964current
I-380 1.6712.689 I-280 in San BrunoUS 101 1964current
I-480 I-80 in San FranciscoSansome Street in San Francisco 19571968 Was to be the Embarcadero Freeway; downgraded to a state highway in 1968 and fully decommissioned in 1991
I-580 75.63121.71 US 101 in San RafaelI-5 near Westley 1964current Segments were originally part of I-5W
I-680 70.52113.49 I-280/US 101 in San JoseI-80 in Cordelia 1955current Originally SR 21
I-780 6.5010.46 I-80 in VallejoI-680 in Benicia 1955current Originally part of I-680
I-880 47.2275.99 I-280/SR 17 in San JoseI-80/I-580 in Oakland 1983current Originally part of SR 17
I-980 2.033.27 I-880 in Downtown OaklandI-580/SR 24 in Oakland 1981current
I580 30.0948.43 US 50 in Carson CityI-80 in Reno 2012current Runs concurrently with US 395
I-180 13.1921.23 IL 26/IL 71 in Hennepin, IllinoisI-80 near Princeton, Illinois 1969current
I-280 26.9843.42 I-80 near Davenport, IAI-74/I-80 near Colona, IL 1990current
I-380 73.05117.56 I-80 near Iowa CityUS 218 in Waterloo 1985current Connects Cedar Rapids with I-80
I-480 4.907.89 I-80/US 75 in Omaha, NEI-29/US 6 in Council Bluffs, IA 1966current
I-680 42.8668.98 I-80 in Omaha, NEI-80 near Neola, IA 1966current
I-180 3.185.12 US 34 (9th St. / 10th St.) in LincolnI-80 / US 34 / US 77 in Lincoln 1964current
I-580 1.602.57 I-480 in OmahaLake Street in Omaha 19761982 Now part of US 75
I-280 17.8528.73 I-80 in Parsippany-Troy HillsI-95/NJ Tpk. in Kearny 1958current
I-280 12.4119.97 I-75 in Toledo, OHI-80/I-90/Ohio Tpk. in Lake Township, OH 1959current
I-480 41.7767.22 I-80/Ohio Tpk. in North Ridgeville, OHI-80/Ohio Tpk. in Streetsboro, OH 1971current
I-680 16.4326.44 I-76/Ohio Tpk. in North Lima, OHI-80/SR 11 near Mineral Ridge, OH 1964current
I-180 28.8546.43 US 15/US 220 in Williamsport, PAI-80/PA 147 near Milton, PA 1984current
I-380 24.7639.85 I-80 in Tunkhannock Township. PAI-81/I-84/US 6 in Dunmore, PA 1973current
I-180 1.091.75 I-80 in Cheyenne, WYI-80 Bus/US 30 in Cheyenne, WY 1984current Not built to Interstate Highway standards
I-481 15.0424.20 I-81 in Onondaga, NYI-81/NY 481 in North Syracuse 1970current
I-781 4.306.92 I-81 in Pamelia, NYFort Drum main gate in Le Ray, NY 2012current
I381 1.672.69 SR 381 in BristolI-81 in Bristol 1961current
I581 6.6410.69 US 220/SR 24 in RoanokeI-81 near Hollins 1950current
I182 15.1924.45 I-82/US 12 near RichlandUS 12/US 395 in Pasco 1986current
I-283 2.914.68 I-76/Penna Tpk. near HighspireI-83/US 322/Capital Beltway near Harrisburg 1972current
I-384 8.2013.20 I-84/US 6 in East HartfordUS 6/US 44 in Bolton 1984current
I-684 28.4745.82 I-287 near White Plains, NYNY 22 near Brewster, NY 1974current Also crosses into Connecticut
I-184 3.625.83 I-84 in Boise, IDUS 20/US 26 1990current
I685 14.0022.53 I-65 in downtown Montgomery, ALI-85 in Montgomery, AL proposed
I185 49.3079.34 US 27/US 280/SR 520 in ColumbusI-85 near LaGrange 1979current
I285 63.98102.97 Beltway around Atlanta, GA 1969current
I985 24.0438.69 I-85 near Buford, GASR 369 near Gainesville 1985current
I285 I-85/I-85 Bus./US 29/US 52/US 70 near Lexington, NCI-40/US 52/US 311/NC 8 in Winston-Salem, NC proposed
I485 66.68107.31 Beltway around Charlotte, NC 1988current
I785 2.213.56 I-40/I-85/I-840/I-85 Bus. in Greensboro, NCUS 70 in Greensboro, NC 2013current
I-185 17.7028.49 I-385 near Mauldin, SCUS 29 in Greenville, SC 1955current
I-385 42.1667.85 I-26 near Clinton, SCUS 276 in Greenville, SC 1962current
I-585 2.253.62 US 176/US 221/SC 9 in Spartanburg, SCI-85 Bus./US 176 near Spartanburg, SC 1962current
I785 US 29/US 58/US 29 Bus. in Danville, VAUS 29/US 58/US 360/US 58 Bus. in Danville, VA proposed
I-287 98.72158.87 I-95/NJ Tpk. in Edison, NJI-95 in Rye, NY 1961current
I-587 1.211.95 I-87/Thruway/NY 28 in Kingston, NYNY 28/NY 32 in Kingston, NY 1960current
I587 Future I 87 (current US 64) near Zebulon, NCUS 264 near Greenville, NC proposed[14]
I-787 10.1616.35 I-87/Thruway in Albany, NYNY 7 in Green Island, NY 1968current
I189 1.492.40 US 7 in South Burlington, VTI-89 in South Burlington 1980current
I-190 3.074.94 O'Hare International Airport in Chicago, ILI-90 in Chicago, IL 1978current
I-290 29.8448.02 I-90/IL 53 in Rolling Meadows, ILI-90/I-94 / Congress Parkway in Chicago, IL 1972current
I190 19.2631.00 I-290 in Worcester, MARoute 2 in Leominster, MA 1983current
I290 20.1632.44 I-395 in Auburn, MAI-495 in Marlborough, MA 1970current
I-190 28.3445.61 I-90/Thruway in Cheektowaga, NYHighway 405 at Lewiston, NY 1959current
I-290 9.8015.77 I-190 in Tonawanda, NYI-90/Thruway in Williamsville, NY 1964current
I-390 76.06122.41 I-86/NY 17 in Avoca, NYI-490 in Gates, NY 1973current
I-490 I-294I-90 proposed[15] Proposed route number for the O'Hare West Bypass
I-490 37.4060.19 I-90/Thruway in Bergen, NYI-90/Thruway in Victor, NY 1970current
I-590 5.318.55 I-390 in Brighton, NYI-490/NY 590 in Rochester, NY 1980current
I-690 14.1922.84 I-90/Thruway/NY 690 in Van Buren, NYI-481 in East Syracuse, NY 1962current
I-790 2.413.88 I-90/Thruway in Deerfield, NYNY 5A/NY 55 in Utica, NY 1961current
I-890 9.3515.05 I-90/Thruway in Rotterdam, NYI-90/Thruway in Guilderland, NY 1962current
I-990 6.3510.22 I-290 in Amherst, NYNY 263 near Lockport, NY 1985current Highest numbered Interstate in the Interstate system
I-490 2.433.91 I-71/I-90 in Cleveland, OHEast 55th Street in Cleveland, OH 1990current
I-190 1.722.77 I-90 in Rapid City, SDUS 16 in Rapid City, SD 1962current
I-291 6.029.69 I-91 in Windsor, CTI-84 in Manchester, CT 1994current
I-691 8.3813.49 I-84 at the Southington-Cheshire town line, CTI-91 in Meriden, CT 1988current
I291 5.448.75 I-91 in Springfield, MAI-90/Mass Pike in Chicopee, MA 1972current
I391 4.467.18 I-91 in Chicopee, MAHigh Street in Holyoke, MA 1970current
I293 11.1817.99 I-93/NH 101 in Manchester, NHI-93/Everett Tpke in Hooksett, NH 2008current
I393 4.607.40 I-93 in Concord, NHNH 9 in Pembroke, NH 1979current
I-294 53.4285.97 I-80/I-94 in South Holland, IllinoisI-94 in Deerfield, Illinois 1968current
I-194 3.385.44 I-94 in Battle Creek. MIM-66 in Battle Creek, MI 1961current
I-394 9.7515.69 I-494/US 12 in Minnetonka, MN4th Street in Minneapolis, MN 1991current
I-494 42.9469.11 I-94/I-694 in Maple Grove, MNI-94/I-694 in Woodbury, MN 1985current Western and southern half of the Minneapolis–St. Paul beltway
I-694 22.6236.40 I-94/I-494 in Maple Grove, MNI-94/I-494 in Woodbury, MN 1970current Northern and eastern half of the Minneapolis–St. Paul beltway
I-194 1.201.93 McKenzie Drive near Bismarck, NDI-94 near Mandan, ND Unsigned
I-794 3.756.04 I-43/I-94 in Milwaukee, WIWIS 794 in Milwaukee, WI 1980current
I-894 4.707.56 I-94 in Milwaukee, WII-43/I-94 in Milwaukee, WI 1966current
I-395 54.6988.02 I-95 in East Lyme, CTI-290 in Auburn, MA 1983current
I295 73.77118.72 I-95/I-495 in New Castle, DEI-95/US 1 in Lawrence Township, NJ 1994current
I495 11.4718.46 I-95/I-295 in Newport, DEI-95 in Claymont, DE 1977current
I295 6.009.66 I-95/I-495 near Forest Heights, MDI-695 in Washington, DC 1964current
I395 13.3921.55 I-95/I-495 in Springfield, VAUS 50 in Washington, DC 1977current Original route of I-95 that was proposed to continue through Washington, DC
I495 31.4150.55 Beltway around Washington, DC 1961current Capital Beltway; runs through Virginia, Maryland and a small sliver of Washington, DC, over the Wilson Bridge
I695 2.003.22 I-395 in Washington, DCI-295 in Washington, DC[16] 1958current
I-195 4.427.11 I-95/SR 112 in Miami, FLSR 905 in Miami Beach, FL 1961current
I-295 61.0498.23 Beltway around Jacksonville 1970current
I-395 1.292.08 I-95MacArthur Causeway at Watson Island, Miami, FL 1971current
I-595 12.8620.70 I-75/SR 869 in Weston, FLUS 1 in Fort Lauderdale, FL 1990current
I-795 Interstate 95 south of JacksonvilleI-295 in Jacksonville proposed Currently under construction; partially open as SR 9B but not yet signed as I-795
I195 1.552.49 I-95/Maine Tpk. in Saco, MESR 5 in Saco, ME 1980current
I295 53.1185.47 I-95/Maine Tpk. in Scarborough, MEI-95/Maine Tpk. in Gardiner, ME 1960current
I395 4.998.03 I-95/US 2/SR 100 in Bangor, MEUS 1A in Brewer, ME 2008current
I495 3.705.95 I-95/Maine Tpk. in Portland, MEI-295/US 1 in Falmouth, ME 2004current Unsigned
I-195 4.71[17]7.58 I-95/MD 166 near Catonsville, MDBaltimore-Washington International Airport 1990current
I-395 1.983.19 I-95 in South Baltimore, MDWest Pratt Street in Baltimore, MD 1981current
I-595 19.9732.14 I-95/I-495/US 50 near Washington, DCUS 50/US 301/MD 70 in Annapolis, MD 2011current Unsigned designation for US 50
I-695 30.5749.20 Beltway around Baltimore 1958current
I-795 8.9914.47 I-695 in Pikesville, MDMD 140 in Reisterstown, MD 1985current
I-895 11.4418.41 I-95 near Elkridge, MDI-95 in Baltimore, MD 1979current
I295 8.0512.96 I-95/I-495 near Forest Heights, MDI-695 in Washington, DC 1964current
I195 44.5571.70 I-95 in Providence, RII-495/Route 25 in Wareham, MA 1958current
I295 26.5842.78 I-95 in Warwick, RII-95 in Attleboro, MA 1969current
I495 121.56195.63 I-195/Route 25 in Wareham, MAI-95 in Salisbury, MA 1957current
I695 I-93 in Roxbury, BostonI-93 in Charlestown, Boston 19551971 Cancelled; was to have been built in connection with a planned alignment of I-95 through downtown Boston
I-195 34.1754.99 I-295 in Hamilton Township, NJRoute 34 in Wall Township, NJ 1968current
I-295 7.7012.39 Hillside Avenue (NY 25)/NY 24 in Queens, NYBruckner Interchange in the Bronx, NY 1970current
I-495 66.38106.83 Queens Midtown Tunnel in Manhattan, NYCR 58 in Riverhead, NY 1958current
I-695 1.402.25 I-95 in the Bronx, NYI-295 in the Bronx, NY 1986current
I-895 1.121.80 I-278 in the Bronx, NYI-95 in the Bronx, NY 1970current
I295 proposed Planned route around the west side of Fayetteville, NC
I495 4.106.60 I-440/US 64/US 64 Bus in Raleigh, NCI-540/US 64/US 264 in Knightdale, NC 2013current
I795 25.4640.97 US 70/US 117 in Goldsboro, NCI-95/US 264 in Wilson, NC 2007current
I195 3.245.21 SR 195 in Richmond, VAI-64/I-95 in Richmond, VA 1970current
I295 52.5684.59 I-95 near Petersburg, VAI-64 near Short Pump, VA 1980current
I-196 37.07[11]59.66 US 31 in Norton Shores, MII-96/US 16 in Grand Rapids, MI 19591963 Now the western end of I-96
I-196 80.65129.79 I-94/US 31 near Benton Harbor, MII-96/M-37 in Grand Rapids, MI 1963current
I-296 3.435.52 I-196 in Grand Rapids, MII-96/M-37 in Walker, MI 1962current Unsigned since 1979
I-496 11.7818.96 I-69/I-96 near Lansing, MII-96 and US 127 near Lansing, MI 1970current
I-696 29.3947.30 I-96/I-275 & M-5 in Novi, MII-94 in Roseville, MI 1989current
  •       Former
  •       Future

See also

Notes

  1. According to the FHWA, I-275 in Michigan is only 29.97 mi (48.23 km) because they do not count the length overlapping I-96.[3] MDOT and most major map publishers do count the overlap.[11][12][13]

References

  1. Weingroff, Richard F. (Summer 1996). "Federal-Aid Highway Act of 1956, Creating the Interstate System". Public Roads. Washington, DC: Federal Highway Administration. 60 (1). Retrieved March 16, 2012.
  2. 1 2 3 DeSimone, Tony (October 31, 2002). "FHWA Route Log and Finder List: Interstate Route Numbering". Federal Highway Administration. Retrieved February 3, 2008.
  3. 1 2 Adderly, Kevin (December 31, 2015). "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of December 31, 2015". Route Log and Finder List. Federal Highway Administration. Retrieved February 6, 2016.
  4. Tabb, John R. (December 8, 1990). "Report of the Special Committee on U.S. Route Numbering to the Executive Committee" (PDF) (Report). Phoenix, AZ: American Association of State Highway and Transportation Officials.
  5. Warring, KS (January 2, 2008). "Interstate 905 Freeway Interchanges" (PDF). California Numbered Exit Uniform System. Sacramento: California Department of Transportation. Retrieved February 5, 2009.
  6. Cavanaugh, Patricia (October 2006). "Politics and Freeways: Building the Twin Cities Interstate System". University of Minnesota.
  7. Tennessee Department of Transportation (October 31, 2003). "TDOT Announces Decision on State Route 840 North" (PDF) (Press release). Tennessee Department of Transportation. Archived from the original (PDF) on November 27, 2007. Retrieved July 17, 2007.
  8. Federal Highway Administration (October 31, 2002). "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of October 31, 2002". Route Log and Finder List. Federal Highway Administration. Archived from the original on July 17, 2007. Retrieved July 8, 2007.
  9. Dozier, Daniel A. (September 5, 2013). "Request for I-69 Designation for I-164 from I-64 to US 41" (PDF) (Letter). Letter to Richard J. Marquis. Indianapolis: Indiana Department of Transportation. Retrieved January 9, 2015 via American Association of State Highway and Transportation Officials.
  10. Highway Information Services Division (December 31, 2013). Highway Location Reference. Maryland State Highway Administration. Retrieved March 2, 2012.
  11. 1 2 3 Michigan Department of Transportation & Michigan Center for Shared Solutions and Technology Partnerships (2009). MDOT Physical Reference Finder Application (Map). Michigan Department of Transportation. Retrieved February 6, 2016.
  12. Rand McNally (2008). "Michigan: Cities" (Map). The Road Atlas. 1 in≈5 mi. Chicago: Rand McNally. p. 52. Detroit & Vicinity inset. § I3. ISBN 0-528-93981-5. OCLC 226315010.
  13. Google (February 24, 2010). "Overview Map of I-275" (Map). Google Maps. Google. Retrieved February 24, 2010.
  14. "State Seeking Future Interstate Designation for U.S. 264 to Greenville". North Carolina Governor's Office. Retrieved 10 November 2016.
  15. Mike DeBonis (28 November 2011). "Interstate 695 reappears in D.C.". Washington Post.
  16. Highway Information Services Division (December 31, 2013). Highway Location Reference. Maryland State Highway Administration. Retrieved September 24, 2012.
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