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List of auxiliary Interstate Highways

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The auxiliary Interstate Highways (also called 3-digit Interstate Highways) is an additional network of freeways of the Interstate Highway System. Similar to the primary Interstate Highways, they also meet Interstate Standards, receive the same substantial federal funding, and comply with other federal standards. The main purpose of the auxiliary Interstate Highways is to serve large cities and suburbs and provide a supplement to the main Interstate Highways throughout the United States.

In contrast to the primary Interstate Highways, the three-digit highways often run only within or around a single metropolitan city. In addition, its route lengths are not entirely as long, and almost all of the highways do not cross state borders, despite the term "Interstate".

Due to the large number of these routes, auxiliary route numbers may be repeated in different states along the mainline. However, no two three-digit Interstates in the same state can share the same number.

Terminology and guidelines

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 determines whether a route is a loop, spur, or beltway. The last two digits are derived from the main Interstate Highway. For instance, I-576 contains an odd number in the first digit– "5", and indicates that this freeway is a spur. The last two digits signify the highway's origin. In this case, the "76" in I-576 supplements to I-76.

Spur route

A spur route may begin at a large highway and terminate at a regular city street in a downtown area of a metropolitan city. A spur route is preceded by an odd number in the first digit.[1]

  • Examples of spur routes are listed below.
I-110 in California travels into downtown Los Angeles.
I-180 in Nebraska makes its way through Lincoln

Sometimes, a three-digit highway branches off another three-digit highway; this is called a tertiary spur route of a two-digit highway. Tertiary spurs do not meet their parent highways, but are associated with them via the three-digit highways they do meet.

  • Examples of tertiary spur routes are listed below.
I-370 in Maryland branches off I-270, and is thus a tertiary spur of I-70.
I-380 in California is located at the San Francisco Bay Area; the route begins at I-280 and never connects to its parent I-80.

Bypasses

A bypass route may traverse around a city. 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.[1]

  • Examples of bypass routes are listed below.
I-215 in Utah travels the perimeter of Salt Lake City.
I-895 in Maryland serves as a bypass of downtown Baltimore.

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. Beltways are also preceded by an even number in the first digit.

  • Examples of beltways are listed below.
I-465 in Indiana travels around the city of Indianapolis.
I-285 in Georgia engulfs the city of Atlanta.

Exceptions

Of course, there are many exceptions to the typical guidelines in some auxiliary Interstate Highways.

  • One prominent example of such rule-breaker is listed below.
I-238 in California does not contain a parent Interstate (there is no "I-38"). Rather, it is named after CA 238.

Auxiliary Interstates

Below is a list of auxiliary Interstate Highway designations in the United States. They are sorted in the following order:

  1. numerically by the primary Interstate Highway (one or two digits)
  2. alphabetically by the state of the auxiliary Interstate
  3. numerically by the auxiliary Interstate itself
Contents: 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(E) 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
Legend
Existing route Unsigned route Future route
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate H-1

Hawaii

H-201 4.10 mi (6.60 km) H-1 in Halawa H-1 in Honolulu
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 5

California

I-105 17.32 mi (27.87 km) CA-1 in El Segundo I-605 in Norwalk
I-205 12.97 mi (20.87 km) I-580 near Tracy I-5 near Tracy
I-305 8.44 mi (13.58 km) I-80 in West Sacramento I-80 BUS/US 50/CA-99 in Sacramento
I-405 72.15 mi (116.11 km) I-5 in Irvine I-5 in Mission Hills
I-505 32.98 mi (53.08 km) I-80 in Vacaville I-5 in Dunnigan
I-605 27.40 mi (44.10 km) I-405 in Seal Beach I-210 in Irwindale
I-805 28.02 mi (45.09 km) I-5 in San Diego I-5 in San Ysidro
I-905 Proposed auxiliary route to connect to the Mexican border in the San Diego area

Oregon

I-105 3.49 mi (5.62 km) OR 99 in Eugene I-5 in Springfield
I-405 3.53 mi (5.68 km) I-5 in Portland I-5 in Portland

Oregon-Washington

I-205 36.64 mi (58.97 km) I-5 in Tualatin, OR I-5 in Salmon Creek, WA

Washington

I-405 30.30 mi (48.76 km) I-5/WA 518 in Tukwila I-5/WA 525 in Lynnwood
I-605 Proposed to bypass Seattle
I-705 1.50 mi (2.41 km) I-5/WA 7 in Tacoma Schuster Parkway in Tacoma
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 10

California

I-110 20.43 mi (32.88 km) CA-47 in San Pedro, Los Angeles I-10/CA-110 in Los Angeles
I-210 48.52 mi (78.09 km)[3] I-5 in San Fernando Valley CA-57/CA-210 in Glendora
I-710 19.66 mi (31.64 km) Terminal Island in Long Beach Valley Boulevard in Alhambra

Florida

I-110 6.94 mi (11.17 km)
US 98 BUS in Pensacola 		I-10 near Pensacola

Louisiana

I-110 8.89 mi (14.31 km) I-10 in Baton Rouge US 61 in Baton Rouge
I-210 12.40 mi (19.96 km) I-10 near Sulphur I-10 in Lake Charles
I-310 11.25 mi (18.11 km) US 90 in Boutte I-10 near Kenner
I-510 5.10 mi (8.21 km) LA 47 in New Orleans I-10 in New Orleans
I-610 4.52 mi (7.27 km) I-10 at the Orleans-Jefferson Parish I-10 in New Orleans
I-910 9.70 mi (15.61 km)
US 90 BUS in Marrero 		I-10 in New Orleans

Mississippi

I-110 4.10 mi (6.60 km) US 90 in Biloxi I-10 in D'Iberville

Texas

I-110 0.92 mi (1.48 km) United States-Mexico border in El Paso I-10 in El Paso
I-410 49.49 mi (79.65 km) Beltway around San Antonio
I-610 37.97 mi (61.11 km) Beltway around Houston
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 15

California

I-215 54.50 mi (87.71 km) I-15 in Murrieta I-15 in Devore

Montana

I-115 1.19 mi (1.92 km) I-15/I-90 in Butte Iron Street in Butte
I-315 0.83 mi (1.34 km) I-15 in Great Falls I-15 BUS/US 89 in Great Falls

Nevada

I-215 2.417 mi (3.890 km)[4] County Highway 215 near I-15 Paradise I-515/US 93/US 95/NV 564 in Henderson
I-515 20.54 mi (33.06 km) US 93/US 95 in Henderson I-15/US 93/US 95 in Las Vegas

Utah

I-215 29.02 mi (46.70 km) I-80 in Salt Lake City I-15 in North Salt Lake
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 16

Georgia

I-516 6.49 mi (10.44 km) GA 21/GA 204 in Savannah GA 21 in Garden City
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 20

Georgia-South Carolina

I-520 17.48 mi (28.13 km)[5] I-20 in Augusta, GA US 1 in North Augusta, SC

Louisiana

I-220 17.62 mi (28.36 km) I-20 in Shreveport I-20 in Bossier City

Mississippi

I-220 12.01 mi (19.33 km) I-20 in Jackson I-55 in Ridgeland

Texas

I-820 35.17 mi (56.60 km) Beltway around Fort Worth
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 24

Tennessee

I-124 1.97 mi (3.17 km) I-24 in Chattanooga US 27 in Chattanooga
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 25

Colorado

I-225 12.00 mi (19.31 km) I-25 in Aurora I-70 in Aurora
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 26

South Carolina

I-126 3.68 mi (5.92 km) I-26 in Columbia US 76/US 21/US 176/US 321 in Columbia
I-526 19.26 mi (31.00 km) I-526 BUS/US 17 in Mount Pleasant US 17 in Charleston
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 29

Iowa-Nebraska

I-129 3.48 mi (5.60 km) US 77/20/75 in South Sioux City, NE I-29/US 20/75 in Sioux City, IA

Missouri

I-229 14.97 mi (24.09 km) I-29 in St. Joseph I-29/US 59/71 in St. Joseph

South Dakota

I-229 11.33 mi (18.23 km) I-29 in Sioux Falls I-90 in Sioux Falls
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 30

Arkansas

I-130 Proposed route in Texarkana
I-430 12.93 mi (20.81 km) I-30/US 67 in Little Rock I-40/US 65 in Little Rock
I-530 46.65 mi (75.08 km) US 65 in Pine Bluff I-30/440 in Little Rock
I-630 7.40 mi (11.91 km) I-430 near Little Rock I-30 in Little Rock
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 35

Iowa

I-235 13.78 mi (22.18 km) I-35/I-80 in West Des Moines I-35/I-80 near Des Moines

Kansas

I-135 95.74 mi (154.08 km) I-135/K-96 in Wichita I-70/US 81 in Salina
I-235 16.52 mi (26.59 km) I-135/K-96 in Wichita I-135 in Wichita
I-335 50.13 mi (80.68 km) I-35/US 50 in Emporia I-470 in Topeka

Kansas-Missouri

I-435 80.81 mi (130.05 km) Beltway around Kansas City, KS and Kansas City, MO
I-635 12.67 mi (20.39 km) I-35 in Overland Park, KS I-29/US 71 in Kansas City, MO

Minnesota-Wisconsin

I-535 2.78 mi (4.47 km) I-35/US 53 in Duluth, MN US 53/WIS 35 in Superior, WI

Oklahoma

I-235 5.36 mi (8.63 km) I-35/40 in Oklahoma City I-44 in Edmond

Texas

I-635 37.00 mi (59.55 km) SH 121 in Grapevine I-20 in Balch Springs
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 40

Arkansas

I-440 9.96 mi (16.03 km) I-30/I-530 near Little Rock I-40/Highway 440 near Little Rock
I-540 80.72 mi (129.91 km) US 271/AR 253 near Fort Smith US 62/US 71 in Bentonville

North Carolina

I-140 27 mi (44 km) US 421 near Navassa US 17 near Ogden
I-240 9.14 mi (14.71 km) I-40/I-26 near Asheville I-40 in eastern Asheville
I-440 16.40 mi (26.39 km) I-40/US 1/64 near Cary I-40 near Raleigh
I-540 26 mi (42 km) I-40 near Durham US 64/US 264 near Knightdale
I-840 Future part of the Greensboro Urban Loop

Oklahoma

I-240 16.22 mi (26.10 km) I-44/US 62 in Oklahoma City I-40/US 270 in Oklahoma City

Tennessee

I-140 11.1 mi (17.9 km) I-40/I-75 near Farragut US 129 near Alcoa
I-240 19.27 mi (31.01 km) I-40 in Memphis I-40 in Memphis
I-440 8 mi (13 km) I-40 in Nashville I-24 in Nashville
I-640 7.03 mi (11 km) I-40 in Knoxville I-40 in Knoxville
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 44

Oklahoma

I-244 15.75 mi (25.35 km) I-44 in Tulsa I-44 in Tulsa
I-444 2.51 mi (4.04 km) I-244 in Tulsa I-244 in Tulsa
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 45

Texas

I-345 1.4 mi (2.25 km) I-45/ I-35 in Dallas US-75 in Dallas
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 55

Arkansas

I-555 44 mi (70.81 km) I-55 in Turrell AR 91 in Jonesboro

Illinois

I-155 32.13 mi (51.71 km) I-74 in Morton I-55 in Lincoln
I-355 20.01 mi (32.2 km) I-55 in Bolingbrook I-290 in Itasca

Illinois-Missouri

I-255 30.82 mi (49.60 km) I-55/I-270 in Mehlville, MO ILL 255 in Pontoon Beach, IL

Missouri-Tennessee

I-155 26.77 mi (43.08 km) I-55 near Hayti, MO US 51 at Dyersburg, TN
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 59

Alabama

I-359 2.3 mi (3.70 km) I-20/I-59 in Moundville 15th Street in Steelman College
I-459 32 mi (51.50 km) I-20/I-59 in Bessemer I-59 in Trussville
I-759 4.5 mi (7.24 km) I-59 in Attalla US 411/SR 759 in Gadsden
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 64

Indiana

I-164 21.24 mi (34.18 km) I-64/I-69 in Evansville US-41 in Evansville

Kentucky

I-264 22.93 mi (36.90 km) I-64 in Louisville I-71 in Louisville

Virginia

I-264 25 mi (40.23 km) I-64/I-664 in Portsmouth King Street in Oceanfront
I-464 5.66 mi (9.11 km) I-64 in Norfolk I-264 in Chesapeake
I-564 2.77 mi (4.46 km) VA 337 I-64 in Norfolk
I-664 20.79 mi (33.46 km) I-64/I-664 in Newport News I-64 in Hampton
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 65

Alabama

I-165 4.9 mi (7.89 km) US-43 in Mobile I-65 in Mobile
I-565 34 mi (54.72 km) I-65/ALT US 72/AL 20 in Decatur US-72 in Huntsville

Indiana

I-265 32 mi (51.50 km) I-64 in New Albany IN 265/IN 62
I-465 53 mi (85.30 km) Beltway around Indianapolis
I-865 5 mi (8.05 km) Interstate 65 near Indianapolis Interstate 465 near Indianapolis
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 69

Indiana

I-469 30.83 mi (49.62 km) I-69 in Ft. Wayne I-69 in Ft. Wayne

Mississippi-Tenessee

I-269 Proposed Memphis, TN outer beltline.
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 70

Colorado

I-270 5.31 mi (8.55 km) I-25/US 36 at Welby I-70/US 36 at Denver

Illinois

I-270 14.97 mi (24.09 km) Missouri border on the Mississippi River Interstate 55 in Illinois/Interstate 70 in Illinois near Troy

Illinois-Missouri

I-170 11.17 mi (17.98 km) I-64/US 40 in Richmond Heights I-270 in Hazelwood

Kansas

I-470 13.72 mi (22.08 km) I-70 in Topeka I-70 in Topeka

Kansas-Missouri

I-670 1.64 mi (2.64 km) I-70 in Kansas City, KS I-70 in Kansas City, MO

Maryland

I-270 34.40 mi (55.36 km) I-70 near Frederick I-495 north of Bethesda
I-370 3.13 mi (5.04 km) Interstate 270 in Gaithersburg Shady Grove Metro Station

Missouri

I-270 35.62 mi (57.32 km) Interstate 55 in Missouri/I-255 in Green Park, MO Illinois border on the Mississippi River
I-470 16.72 mi (26.91 km) I-435 in Kansas City I-70 in Independence, Missouri

Ohio

I-270 54.97 mi (88.47 km) Beltway around Columbus
I-670 9.37 mi (15.08 km) I-70 in Columbus I-71 in Columbus

Ohio-West Virginia

I-470 6.69 mi (10.77 km) I-70 near Blaine, OH I-70 in Elm Grove, WV
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 71

Kentucky-Ohio

I-471 5.75 mi (9.25 km) I-275 in Newport I-71 in Newport

Ohio

I-271 56 mi (90.12 km) I-71 in Cleveland I-90 in Cleveland
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 72

Illinois

I-172 19.69 mi (31.69 km) I-72 in Quincy US-24 in Quincy
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 74

Illinois

I-474 14.88 mi (23.95 km) I-74 in Peoria I-74 in Morton

North Carolina

I-274 Proposed route in Winston-Salem

South Carolina

I-174 Proposed route in Horry County
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 75

Florida

I-175 14.88 mi (23.95 km) I-275 in St. Petersburg FL-687 in St. Petersburg
I-275 63.39 mi (102.02 km) I-75 in Tampa Bay Area I-75 in Tampa Bay Area
I-375 1.34 mi (2.16 km) I-275 in St. Petersburg US 92 in St. Petersburg

Georgia

I-475 15.8 mi (25.43 km) I-75 in Macon I-75 in Macon
I-575 30.9 mi (49.73 km) I-75 in Atlanta I-75 in Atlanta
I-675 11.04 mi (17.77 km) I-75 in Stockbridge I-285 southeast of Atlanta

Indiana-Kentucky-Ohio

I-275 83.71 mi (134.72 km) Beltway around Cincinnati, OH

Michigan

I-275 35.01 mi (56.34 km) I-75 near Monroe I-96/I-696/M-5 in Farmington Hills
I-375 1.06 mi (1.71 km) I-375 BUS in Detorit I-75 in Detorit
I-475 16.99 mi (27.34 km) I-75 in Grand Blanc Township I-75/US 23 in Mount Morris Township
I-675 7.73 mi (12.44 km) I-75/US 23 in Saginaw I-75/US 23 in Zilwaukee

Ohio

I-475 20.37 mi (33 km) I-75 in Perrysburg I-75 in Toledo
I-675 26.53 mi (43 km) I-75 near Miamisburg US 35 near Beavercreek

Tennessee

I-275 2.98 mi (5 km) I-40 in Knoxville I-640/I-75 in Knoxville
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 76 (east)

Pennsylvania

I-176 11.33 mi (18.23 km) I-76/Pennsylvania Turnpike in Morgantown US 422 near Reading
I-276 32.65 mi (52.55 km) I-76 in King of Prussia NJ Turnpike Ext. in Bristol Township
I-376 14.70 mi (23.66 km) I-279 in Pittsburgh I-76/US 22 in Monroeville
I-476 132.10 mi (212.59 km) I-95 near Chester I-81 near Clarks Summit
I-676 6.90 mi (11.1 km) I-76/US 30 in Philadelphia I-76 in Camden, NJ
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 77

Ohio

I-277 4.14 mi (6.66 km) I-76 in Akron I-77 in Akron
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 78

New Jersey

I-278 35.6 mi (57.3 km) US 1/US 9 in Linden Bruckner Interchange in Bronx, New York City, NY

New York

File:I-278 (NY).svg I-278 35.6 mi (57.3 km) US 1/9 in Linden, NJ Bruckner Interchange in Bronx, New York City
I-478 2.14 mi (3.44 km) File:I-278 (NY).svg I-278 in Brooklyn, New York City NY 9A in Manhattan, New York City
I-678 14 mi (23 km) John F. Kennedy International Airport in Queens, New York City Bruckner Interchange in Bronx, New York City
File:I-878 (NY).svg I-878 5.69 mi (9.16 km) Belt Parkway/NY 27 in Queens, New York City Atlantic Beach Bridge in Lawrence
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 79

Pennsylvania

I-279 19.52 mi (31.41 km) I-79/US 22/US 30 near Pittsburgh I-79 in Franklin Township
I-579 1.57 mi (2.53 km) PA 885 in Pittsburgh I-279/PA 28 in Pittsburgh
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 80

California

I-280 57 mi (91.73 km) I-680/US-101 in San Jose King Street in San Francisco
I-380 1.5 mi (2.41 km) I-280 in San Bruno US 101
I-580 71 mi (114.26 km) US-101 in San Rafael I-5 near Westley
I-680 71 mi (114 km) I-280/US-101 in San Jose I-80 in Cordelia
I-780 6.52 mi (10.49 km) I-80 in Vallejo I-680 in Benicia
I-880 45 mi (72 km) I-280/CA-17 in San Jose I-580/I-80 in Oakland
I-980 2.02 mi (3.25 km) I-880 in Downtown Oakland I-580/CA-24 in Oakland

Illinois

I-180 13.19 mi (21.22 km) ILL 26/ILL 71 in Hennepin, Illinois I-80 near Princeton, Illinois

Illinois-Iowa

I-280 26.98 mi (43.42 km) I-80 near Davenport, IA I-74/80 near Colona, IL

Iowa

I-380 73.05 mi (117.56 km) I-80 near Iowa City US 218 in Waterloo

Iowa-Nebraska

I-480 4.90 mi (7.89 km) I-80/US 75 in Omaha, NE I-29/US 6 in Council Bluffs, IA
I-680 42.86 mi (68.98 km) I-80 in Omaha, NE I-80 near Neola, IA

Nebraska

I-180 3.47 mi (5.58 km) US 34 in Lincoln I-80/US 34/US 77 in Lincoln

Nevada

I-580 4.99 mi (8.03 km) File:600px-Nevada 667.gif NV 667 in Reno I-80 in Reno

New Jersey

I-280 17.85 mi (28.73 km) I-80 in Parsippany-Troy Hills I-95/New Jersey Turnpike in Kearny

Ohio

I-280 12.41 mi (19.97 km) I-75 in Toledo I-80/I-90/OH Tpk. in Lake Township
I-480 41.77 mi (67.22 km) I-80/Ohio Turnpike near North Ridgeville I-80/Ohio Turnpike near Streetsboro
I-680 16.43 mi (26.44 km) I-76/Ohio Turnpike in North Lima, I-80/OH 11 near Mineral Ridge,

Pennsylvania

I-180 28.85 mi (46.43 km) US 15/US 220 in Williamsport I-80/ PA 147 near Milford
I-380 24.76 mi (39.85 km) I-80 in Tunkhannock Township I-81/I-84/US 6 in Dunmore

Wyoming

I-180 1.09 mi (1.75 km) I-80 in Cheyenne Bus I-80/US 30
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 81

New York

I-481 15.04 mi (24.2 km) I-81 in Onondaga I-81/NY 481 in North Syracuse

Virginia

I-381 1.70 mi (2.74 km) SR 381 in Bristol I-81 in Bristol
I-581 6.35 mi (10.22 km) US 220/VA 24 in Roanoke I-81 near Hollins
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 82

Washington

I-182 15.19 mi (24.45 km) I-82/US 12 near Richland US 12/US 395 in Pasco
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 83

Pennsylvania

I-283 2.91 mi (4.683 km) I-76/Pennsylvania Turnpike near Highspire File:Capital Beltway.gif I-83/US 322/Capital Beltway near Harrisburg
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 84 (east)

Connecticut

I-384 8.53 mi (13.73 km) I-84/US 6 in East Hartford US 6/44 in Bolton

New York

File:I-684 (NY).svg I-684 28.4 mi (45.7 km) File:I-287 (NY).svg I-287 near White Plains NY 22 near Brewster
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 84 (west)

Idaho

I-184 3.62 mi (6.00 km) I-84 in Boise US 20/US 26
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 85

Georgia

I-185 49.30 mi (79.34 km) US 27/280/SR 520 in Columbus I-85 near LaGrange
I-285 63.98 mi (102.97 km) Beltway around Atlanta
I-985 24.04 mi (38.69 km) I-85 near Buford SR 369 near Gainesville

North Carolina

I-285 23 mi (37 km) I-40/US 52/311/NC 8 in Winston-Salem I-85/I-85 Bus./US 29/52/70 in Lexington
I-485 46 mi (74.03 km) NC 16 in Charlotte I-85 in Charlotte

North Carolina-Virginia

I-785 45 mi (72.42 km) I-40/85/85 BUS in Greensboro, NC US 29 in Danville, VA

South Carolina

I-185 17.70 mi (28.49 km) I-385 near Mauldin US 29
I-385 42.16 mi (67.85 km) I-26 near Clinton US 276 in Greenvile
I-585 2.25 mi (3.62 km) US 221 in Spartanburg I-85 BUS near Spartanburg
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 87

New Jersey-New York

I-287 98.65 mi (158.73 km) I-95/New Jersey Turnpike in Edison, NJ I-95 in Rye, NY

New York

I-587 1.21 mi (1.95 km) I-87/New York State Thruway/NY 28 in Kingston NY 28/NY 32 in Kingston
I-787 9.55 mi (15.37 km) I-87/New York State Thruway in Albany NY 7 in Green Island
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 89

Vermont

I-189 1.49 mi (2.4 km) US 7 in South Burlington I-89 in South Burlington
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 90

Illinois

I-190 3.07 mi (5 km) O'Hare International Airport in Chicago I-90 in Chicago
I-290 29.84 mi (48.02 km) I-90/ILL 53 in Rolling Meadows I-90/I-94/Congress Parkway in Chicago

Massachusetts

I-190 19.26 mi (31 km) I-290 in Worcester Route 2 in Leominster
I-290 20.16 mi (32.44 km) I-90/I-395 in Auburn I-495 in Marlborough

New York

I-190 28.34 mi (45.61 km) File:I-90 (NY).svg I-90/New York State Thruway in Cheektowaga ONT 405 at the Canadian Border in Lewiston
I-290 9.80 mi (15.77 km) I-190 in Tonawanda File:I-90 (NY).svg I-90/New York State Thruway in Williamsville
I-390 75.86 mi (122.08 km) File:I-86 (NY).svg I-86/NY 15/NY 17 in Avoca I-490 in Gates
I-490 37.40 mi (60.19 km) File:I-90 (NY).svg I-90/New York State Thruway in Bergen File:I-90 (NY).svg I-90/New York State Thruway in Victor
I-590 5.07 mi (8.16 km) I-390 in Brighton I-490/NY 590 in Rochester
I-690 14.19 mi (22.84 km) File:I-90 (NY).svg I-90/New York State Thruway/NY 690 in Van Buren I-481 in East Syracuse
I-790 2.41 mi (4 km) File:I-90 (NY).svg I-90/New York State Thruway in Deerfield NY 5A/NY 5S in Utica
I-890 9.45 mi (15.21 km) File:I-90 (NY).svg I-90/New York State Thruway in Rotterdam File:I-90 (NY).svg I-90/New York State Thruway in Guilderland
I-990 6.35 mi (10.22 km) I-290 in Amherst NY 263 near Lockport

Ohio

I-490 2.43 mi (4 km) I-90/I-71 in Cleveland 55th Street East in Cleveland

South Dakota

I-190 2 mi (3 km) I-90 in Rapid City US 16 in Rapid City
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 91

Connecticut

I-291 6.40 mi (10.3 km) I-91 in Windsor I-84 in Manchester
I-691 8.92 mi (14.36 km) I-84 at the Southington-Cheshire Town Line I-91 in Meriden

Massachusetts

I-291 5.44 mi[1] (8.75 km) I-91 in Springfield I-90 in Chicopee
I-391 4.86 mi (7.82 km) I-91 in Chicopee High Street in Holyoke
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 93

New Hampshire

I-293 11.43 mi (18.39 km) I-93/NH 101 in Manchester I-93/Everett Turnpike in Hooksett
I-393 4.50 mi (7.24 km) I-93 in Concord NH-9 in Pembroke
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 94

Illinois

I-294 53.42 mi (85.97 km) I-80 in Chicago I-94 in Chicago

Michigan

I-194 3.42 mi (5.5 km) I-94 in Battle Creek MI-66 in Battle Creek

Minnesota

I-394 9.50 mi (15.30 km) I-494/US 12 in Minnetonka 4th Street in Minneapolis
I-494 43 mi (69 km) I-94/I-694 in Maple Grove I-94/I-694 in Woodbury
I-694 31 mi (50 km) I-94/I-494 in Maple Grove I-94/I-694 in Woodbury

North Dakota

I-194 1.7 mi (2.7 km) McKenzie Drive near Bismarck I-94 near Mandan

Wisconsin

I-794 3.75 mi (6.04 km) I-43/I-94 in Milwaukee WI-794 in Milwaukee
I-894 9.30 mi (14.97 km) I-94 in Milwaukee I-43/I-94 in Milwaukee
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 95

Connecticut-Massachusetts

I-395 66.63 mi (107.23 km) I-95 in East Lyme, CT I-90 in Auburn, MA

Delaware

I-295 73.50 mi (118.29 km) I-95/495 in New Castle I-95/US 1 in Lawrence Twp, NJ
I-495 11.47 mi (18.46 km) I-95/295 in Newport I-95 in Claymont

District of Columbia

I-695 1.39 mi (2.24 km) I-395 in Washington Pennsylvania Avenue in Washington

District of Columbia-Maryland

I-295 8.05 mi (12.96 km) I-95/I-495 near Forest Heights, MD I-695 in Washington, DC

District of Columbia-Virginia

I-395 13 mi (21 km) I-95/495 in Springfield, VA US 50 in Washington, DC

Florida

I-195 4.91 mi (7.90 km) I-95/FL-112 in Miami FL-907 in Miami Beach
I-295 35.51 mi (57.15 km) I-95/FL-9A in Jacksonville I-95/FL-9A in Jacksonville
I-395 1.12 mi (2 km) in Miami MacArthur Causeway in Watson Island
I-595 13 mi (20 km) I-75/FL-869 in Weston US 1 in Fort Lauderdale
I-795 Proposed route south of Jacksonville

Maine

I-195 1.55 mi (2.49 km) File:Maine Turnpike logo.gif I-95/Maine Turnpike in Saco ME-5 in Saco
I-295 52 mi (84 km) I-95 in Scarborough I-95 in Gardiner
I-395 4.99 mi (8.03 km) I-95/US 2/ME 100 in Bangor US 1A in Brewer
I-495 3.7 mi (6 km) I-95 in Portland I-295/US 1 in Falmouth

Maryland

I-195 4.88 mi (7.85 km) I-95/MD 166 near Catonsville Baltimore-Washington International Airport
I-295 8.05 mi (12.96 km) I-95/I-495 near Forest Heights I-695 in Washington, DC
I-395 1.98 mi (3.19 km) I-95 in South Baltimore West Pratt Street in Baltimore
I-595 19.97 mi (32 km) I-95/!-495/US 50 outside Washington, DC US 50/US 301/MD 70 in Annapolis
I-695 51.46 mi (82.82 km) Beltway around Baltimore
I-795 8.99 mi (14.47 km) I-695 in Pikesville MD 140 in Reisterstown
I-895 11.44 mi (18.41 km) I-95 near Elkridge I-95 in Baltimore

Maryland-Virginia

I-495 16.13 mi (25.96 km) Beltway around Washington, DC

Massachusetts

I-495 120.74 mi (194.31 km) I-195 in Wareham I-95 in Salisbury

New Jersey

I-195 34.17 mi (54.99 km) I-295 in Hamilton Township NJ 34 in Wall Township
I-295 73.50 mi (118.29 km) I-95/495 in New Castle I-95/US 1 in Lawrence Township

New York

I-295 9.10 mi (14.65 km) NY 25 in Queens, New York City Bruckner Interchange in Bronx, New York City
File:I-495 (NY).svg I-495 71.02 mi (114.3 km) Queens Midtown Tunnel in Manhattan, New York City CR 58 (Suffolk) in Riverhead
I-695 1.3 mi (2.1 km) File:I-95 (NY).svg I-95 in Bronx, New York City I-295 in Bronx, New York City
I-895 1.12 mi (1.8 km) File:I-278 (NY).svg I-278 in Bronx, New York City File:I-95 (NY).svg I-95 in Bronx, New York City

North Carolina

I-295 Planned route around the west side of Fayetteville

Rhode Island-Massachusets

I-195 40.1 miles (64.5 km) I-95 in Providence, RI I-495/MA 25 in Wareham, MA
I-295 26.58 mi (42.78 km) I-95 in Warwick, RI I-95 in Attleboro, MA

Virginia

I-195 3.50 mi (5.63 km) VA 195 in Richmond I-64/I-95 in Richmond
I-295 52.75 mi (84.89 km) I-95 near Petersburg I-64 near Short Pump
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Interstate 96

Michigan

I-196 81 mi (130.35 km) I-94 in Benton Harbor I-96 in Grand Rapids
I-296 3.43 mi (5.52 km) I-196 in Grand Rapids I-96/M-37 in Walker
I-496 11.78 mi (18.96 km) I-96/I-69 in Lansing I-96 in Lansing
I-696 21.24 mi (34.18 km) I-96/I-275/M-5 in Novi I-94 in Roseville
Interstate Length[2] Southern/Western terminus Northern/Eastern terminus

Exceptions

California

I-238 2.16 mi (3.48 km) I-580 in Castro Valley I-880 in San Leandro

See also

References

  1. ^ a b Cite error: The named reference routelog-2001 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an ao ap aq ar as "Route Log and Finder List - Table 2" (CFM). Federal Highway Administration. 10-31-2002. Retrieved 2007-06-02. {{cite web}}: Check date values in: |date= (help)
  3. ^ "California Log of Bridges on State Highways, District 7" (PDF). CalTrans. 2006. Retrieved 2007-06-02. {{cite web}}: Check date values in: |year= (help); Unknown parameter |month= ignored (help)CS1 maint: year (link)
  4. ^ "State Maintained Highways, Descriptions, Index & Maps and NHS, Clark County" (PDF). Retrieved 2007-06-03. {{cite web}}: Cite has empty unknown parameter: |month= (help)
  5. ^ DeLorme Street Atlas USA 2007, Toggle Measure Tool
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