Three-digit Interstate Highway

# numerically by the primary Interstate Highway (one or two digits)
# alphabetically by the state of the three-digit Interstate
# numerically by the three-digit Interstate itself

TRIVIA

I-271 and I-480 near Cleveland, Ohio is the only Concurrency of two three-digit Interstates until Interstate 785 is completed in North Carolina , which will share Interstate 840 on its eastern segment.

I-H-201 is the only three-digit Interstate in Hawaii .

I-238 is the only three-digit Interstate without a "parent" two-digit Interstate.

I-375 in Detroit, Michigan is the shortest signed three-digit Interstate (The unsigned I-878 is said to be the shortest interstate). The longest is I-476 in Pennsylvania .

INTERSTATE H-1

3-digit interstates associated with I-H-1 :

Hawaii

I-H-201 ( Honolulu )

INTERSTATE 5

3-digit interstates associated with I-5 :

California

I-105 (metro Los Angeles )

I-205 (connection to I-580 near Tracy )

I-305 ( Sacramento )

I-405 (metro Los Angeles )

I-505 (metro Sacramento )

I-605 (metro Los Angeles )

I-805 (metro San Diego )

I-905 (proposed in metro San Diego )

Oregon

I-105 ( Eugene )

I-205 (metro Portland )

I-405 ( Portland )

Washington

I-205 ( Vancouver ) - same as the Oregon route

I-405 (metro Seattle )

I-605 (proposed to bypass Seattle )

I-705 ( Tacoma )

INTERSTATE 10

3-digit interstates associated with I-10 :

California

I-110 (metro Los Angeles )

I-210 (metro Los Angeles )

I-710 (metro Los Angeles )

Florida

I-110 ( Pensacola )

Louisiana

I-110 ( Baton Rouge )

I-210 ( Lake Charles )

I-310 ( New Orleans )

I-510 ( New Orleans )

I-610 ( New Orleans )

I-910 (unsigned in New Orleans )

Mississippi

I-110 ( Biloxi - Gulfport )

Texas

I-110 (unsigned in El Paso )

I-410 ( San Antonio )

I-610 ( Houston )

INTERSTATE 15

3-digit interstates associated with I-15 :

California

I-215 (metro San Bernardino - Riverside / Riverside County )

Montana

I-115 ( Butte, Montana )

I-315 (unsigned in Great Falls )

Nevada

I-215 (metro Las Vegas )

I-515 (metro Las Vegas )

Utah

I-215 (metro Salt Lake City )

INTERSTATE 16

3-digit interstates associated with I-16 :

Georgia

I-516 ( Savannah )

INTERSTATE 20

3-digit interstates associated with I-20 :

Georgia

I-520 ( Augusta )

Louisiana

I-220 (metro Shreveport )

Mississippi

I-220 ( Jackson )

South Carolina

I-520 ( North Augusta ) - same as the Georgia route

Texas

I-820 ( Ft. Worth )

INTERSTATE 24

3-digit interstates associated with I-24 :

Tennessee

I-124 (mostly unsigned in Chattanooga )

INTERSTATE 25

3-digit interstates associated with I-25 :

Colorado

I-225 (metro Denver )

INTERSTATE 26

3-digit interstates associated with I-26 :

South Carolina

I-126 ( Columbia )

I-526 ( Charleston )

INTERSTATE 29

3-digit interstates associated with I-29 :

Iowa

I-129 ( Sioux City )

Missouri

I-229 (metro St. Joseph )

Nebraska

I-129 ( South Sioux City ) - same as the Iowa route

South Dakota

I-229 (metro Sioux Falls )

INTERSTATE 30

3-digit interstates associated with I-30 :

Arkansas

I-130 (proposed in Texarkana )

I-430 ( Little Rock )

I-530 ( Pine Bluff )

I-630 ( Little Rock )

INTERSTATE 35

3-digit interstates associated with I-35 :

Iowa

I-235 ( Des Moines )

Kansas

I-135 (from Wichita to Salina )

I-235 ( Wichita )

I-335 (from Topeka to Emporia )

I-435 (metro Kansas City )

I-635 (metro Kansas City )

Minnesota

I-535 ( Duluth )

Missouri

I-435 (metro Kansas City ) - same as the Kansas route

I-635 (metro Kansas City ) - same as the Kansas route

Oklahoma

I-235 ( Oklahoma City )

Texas

I-635 (metro Dallas )

Wisconsin

I-535 ( Superior ) - same as the Minnesota route

INTERSTATE 40

3-digit interstates associated with I-40 :

Arkansas

I-440 ( Little Rock )

I-540 ( Fort Smith )

North Carolina

I-140 ( Wilmington )

I-240 ( Asheville )

I-440 ( Raleigh )

I-540 (metro Raleigh-Durham )

I-840 ( Greensboro )

Oklahoma

I-240 ( Oklahoma City )

Tennessee

I-140 (from Knoxville to Alcoa )

I-240 ( Memphis )

I-440 ( Nashville )

I-640 ( Knoxville )

INTERSTATE 44

3-digit interstates associated with I-44 :

Oklahoma

I-244 ( Tulsa )

I-444 (unsigned in Tulsa )

INTERSTATE 45

3-digit interstates associated with I-45 :

Texas

I-345 (unsigned in Dallas )

INTERSTATE 55

3-digit interstates associated with I-55 :

Arkansas

I-555 (proposed to Jonesboro )

Illinois

I-155 (from Lincoln to Peoria )

I-255 ( East St. Louis )

I-355 (metro Chicago )

Missouri

I-155 ( Caruthersville )

I-255 (metro St. Louis ) - same as the Illinois route

Tennessee

I-155 ( Dyersburg ) - same as the Missouri route

INTERSTATE 59

3-digit interstates associated with I-59 :

Alabama

I-359 ( Tuscaloosa )

I-459 (metro Birmingham )

I-759 ( Gadsden )

INTERSTATE 64

3-digit interstates associated with I-64 :

Indiana

I-164 ( Evansville )

Kentucky

I-264 (metro Louisville )

Virginia

I-264 (from Portsmouth to Virginia Beach Oceanfront)

I-464 (from Norfolk to Chesapeake )

I-564 ( Norfolk )

I-664 (from Newport News to Chesapeake )

INTERSTATE 65

3-digit interstates associated with I-65 :

Alabama

I-165 (metro Mobile )

I-565 (metro Huntsville )

Indiana

I-265 ( New Albany )

I-465 ( Indianapolis )

I-865 ( Indianapolis )

Kentucky

I-265 (metro Louisville )

INTERSTATE 69

3-digit interstates associated with I-69 :

Indiana

I-469 (metro Ft. Wayne )

INTERSTATE 70

3-digit interstates associated with I-70 :

Colorado

I-270 (metro Denver )

Illinois

I-270 (metro East St. Louis )

Kansas

I-470 (metro Kansas City )

I-670 (metro Kansas City )

Maryland

I-270 ( Rockville / Gaithersburg )

I-370 (metro Washington, D.C. )

Missouri

I-170 (metro St. Louis )

I-270 (metro St. Louis ) - same as the Illinois route

I-470 (metro Kansas City )

I-670 (metro Kansas City ) - same as the Kansas route

Ohio

I-270 (metro Columbus )

I-470 (near Wheeling )

I-670 ( Columbus )

West Virginia

I-470 (near Wheeling ) - same as the Ohio route

INTERSTATE 71

3-digit interstates associated with I-71

Kentucky

I-471 ( Newport )

Ohio

I-271 (metro Cleveland )

I-471 ( Cincinnati ) - same as the Kentucky route

INTERSTATE 72

3-digit interstates associated with I-72

Illinois

I-172 (from east of Hannibal, Missouri to north of Quincy, Illinois )

INTERSTATE 74

3-digit interstates associated with I-74

Illinois

I-474 (around Peoria )

North Carolina

I-274 (proposed loop around Winston-Salem )

South Carolina

I-174 (proposed spur to North Myrtle Beach )

INTERSTATE 75

3-digit interstates associated with I-75 :

Florida

I-175 ( St. Petersburg ) (spur of I-275)

I-275 ( Tampa Bay Area )

I-375 ( St. Petersburg ) (spur of I-275)

Georgia

I-475 ( Macon )

I-575 (metro Atlanta )

I-675 (metro Atlanta )

Indiana

I-275 (metro Cincinnati )

Kentucky

I-275 (metro Cincinnati ) - same as the Indiana route

Michigan

I-275 (metro Detroit )

I-375 (downtown Detroit )

I-475 ( Flint )

I-675 ( Saginaw )

Ohio

I-275 (metro Cincinnati ) - same as the Indiana route

I-475 ( Toledo )

I-675 ( Dayton )

Tennessee

I-275 ( Knoxville )

INTERSTATE 76

3-digit interstates associated with I-76

New Jersey

I-676 ( Camden )

Pennsylvania

I-176 ( Reading )

I-276 (metro Philadelphia )

I-376 (metro Pittsburgh )

I-476 (metro Philadelphia to Scranton )

I-576 (proposed in metro Pittsburgh )

I-676 ( Philadelphia ) - same as the New Jersey route

INTERSTATE 77

3-digit interstates associated with I-77

North Carolina

I-277 ( Charlotte )

Ohio

I-277 ( Akron )

INTERSTATE 78

3-digit interstates associated with I-78

New Jersey

I-278 ( Elizabeth )

New York

I-278 ( New York City ) - same as the New Jersey route

I-478 (unsigned in New York City )

I-678 ( New York City )

I-878 (unsigned in New York City )

INTERSTATE 79

3-digit interstates associated with I-79

Pennsylvania

I-279 ( Pittsburgh )

I-579 ( Pittsburgh )

INTERSTATE 80

3-digit interstates associated with I-80 :

California

I-280 ( San Francisco Bay Area )

I-380 ( San Francisco Bay Area )

I-580 ( San Francisco Bay Area )

I-680 ( San Francisco Bay Area )

I-780 ( San Francisco Bay Area )

I-880 ( San Francisco Bay Area )

I-980 ( San Francisco Bay Area )

Illinois

I-180 ( Hennepin )

I-280 ( Rock Island )

Iowa

I-280 ( Davenport ) - same as the Illinois route

I-380 ( Waterloo , Cedar Rapids , Iowa City )

I-480 ( Council Bluffs )

I-680 (metro Omaha, Nebraska )

Nebraska

I-180 ( Lincoln )

I-480 ( Omaha )

I-680 ( Omaha ) - same as the Iowa route

Nevada

I-580 (unsigned in Reno )

New Jersey

I-280 (metro Newark )

Ohio

I-280 ( Toledo )

I-480 ( Cleveland )

I-680 ( Youngstown )

Pennsylvania

I-180 ( Williamsport )

I-380 ( Scranton )

Wyoming

I-180 ( Cheyenne )

INTERSTATE 81

3-digit interstates associated with I-81 :

New York

I-481 (metro Syracuse )

Virginia

I-381 ( Bristol )

I-581 ( Roanoke )

INTERSTATE 82

3-digit interstates associated with I-82 :

Washington

I-182 (metro Tri-Cities )

INTERSTATE 83

3-digit interstates associated with I-83 :

Pennsylvania

I-283 ( Harrisburg )

INTERSTATE 84

3-digit interstates associated with I-84 :

Connecticut

I-384 (metro Hartford )

I-684 (metro New York City )

Idaho

I-184 ( Boise )

New York

I-684 (metro New York City ) - same as the Connecticut route

INTERSTATE 85

3-digit interstates associated with I-85 :

Georgia

I-185 ( Columbus )

I-285 (metro Atlanta )

I-985 (metro Atlanta )

North Carolina

I-285 (proposed in Winston-Salem )

I-485 (metro Charlotte )

I-785 (proposed in Greensboro )

South Carolina

I-185 ( Greenville )

I-385 ( Greenville )

I-585 ( Spartanburg )

Virginia

I-785 (proposed in Danville ) - same as the North Carolina route

INTERSTATE 87

3-digit interstates associated with I-87 :

New Jersey

I-287 (metro New York City )

New York

I-287 (metro New York City ) - same as the New Jersey route

I-487 - Cancelled Interstate planned to run from the Tappen Zee Bridge to the City of Beacon, NY

I-587 ( Kingston )

I-787 ( Albany )

INTERSTATE 89

3-digit interstates associated with I-89 :

Vermont

I-189 ( Burlington )

INTERSTATE 90

3-digit interstates associated with I-90 :

Illinois

I-190 ( Chicago )

I-290 ( Chicago )

Massachusetts

I-190 ( Worcester )

I-290 ( Worcester )

New York

I-190 ( Buffalo )

I-290 ( Buffalo )

I-390 ( Rochester )

I-490 ( Rochester )

I-590 ( Rochester )

I-690 ( Syracuse )

I-790 ( Utica )

I-890 ( Schenectady )

I-990 ( Buffalo )

Ohio

I-490 ( Cleveland )

South Dakota

I-190 ( Rapid City )

INTERSTATE 91

3-digit interstates associated with I-91 :

Connecticut

I-291 ( Hartford )

I-691 (metro Hartford )

Massachusetts

I-291 ( Springfield )

I-391 (metro Springfield )

INTERSTATE 93

3-digit interstates associated with I-93 :

New Hampshire

I-293 ( Manchester )

I-393 ( Concord )

INTERSTATE 94

3-digit interstates associated with I-94 :

Illinois

I-294 ( Chicago )

Michigan

I-194 ( Battle Creek )

Minnesota

I-394 ( Minneapolis )

I-494 ( Minneapolis )

I-694 ( Minneapolis )

North Dakota

I-194 ( Bismarck ), unsigned

Wisconsin

I-794 ( Milwaukee )

I-894 ( Milwaukee )

INTERSTATE 95

3-digit interstates associated with I-95 :

Connecticut

I-395 (north from near New London )

Delaware

I-295 ( Wilmington )

I-495 ( Wilmington )

District Of Columbia

I-295

I-395

I-695 (unsigned)

Florida

I-195 ( Miami )

I-295 ( Jacksonville )

I-395 ( Miami )

I-595 ( Fort Lauderdale )

I-795 (proposed in Jacksonville )

Maine

I-195 ( Saco )

I-295 (north from Portland )

I-395 ( Bangor )

I-495 (unsigned in Portland )

Maryland

I-195 (metro Baltimore )

I-295 (metro Washington, D.C. ) - same as the District of Columbia route

I-395 ( Baltimore )

I-495 (metro Washington, D.C. )

I-595 (unsigned in metro Washington, D.C. )

I-695 (metro Baltimore )

I-795 (metro Baltimore )

I-895 (metro Baltimore )

Massachusetts

I-195 (to Cape Cod )

I-295 ( Attleboro )

I-395 (south from near Worcester ) - same as the Connecticut route

I-495 (metro Boston )

New Jersey

I-195 ( Jersey Shore )

I-295 (south from Trenton ) - same as the Delaware route

New York

I-295 ( New York City )

I-495 (metro New York City )

I-695 ( New York City )

I-895 ( New York City )

North Carolina

I-295 (metro Fayetteville )

Rhode Island

I-195 (metro Providence ) - same as the Massachusetts route

I-295 (metro Providence ) - same as the Massachusetts route

Virginia

I-195 ( Richmond )

I-295 (metro Richmond )

I-395 (metro Washington, D.C. ) - same as the District of Columbia route

I-495 (metro Washington, D.C. ) - same as the Maryland route

INTERSTATE 96

3-digit interstates associated with I-96 :

Michigan

I-196 (from Grand Rapids to Benton Harbor )

I-296 (unsigned in Grand Rapids )

I-496 ( Lansing )

I-696 (metro Detroit )

EXCEPTIONS

California

I-238 ( Hayward, California ) - has no "parent" interstate.

EXTERNAL LINKS

Route Log - Auxiliary Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways as of October 31, 2002

3-digit Interstates at Kurumi.com

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Three-digit Interstate Highway