List of Interstate Highways
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List of Interstate Highways

Dwight D. Eisenhower National System of Interstate and Defense Highways
Interstate 90 markerEisenhower Interstate System sign
Highway shield for Interstate 90 and the Eisenhower Interstate System
Interstate Highways in the 48 contiguous states
System information
FormedJune 29, 1956[1]
Highway names
InterstatesInterstate X (I-X)
System links

There are 70 primary Interstate Highways in the Interstate Highway System, a network of controlled-access freeways in the United States. They are assigned one- or two-digit route numbers, whereas their associated "auxiliary" Interstate Highways receive three-digit route numbers. Typically, odd-numbered Interstates run south-north, with lower numbers in the west and higher numbers in the east; even-numbered Interstates run west-east, with lower numbers in the south and higher numbers in the north. Highways whose route numbers are divisible by "5" usually represent major coast-to-coast or border-to-border routes (ex. I-10 travels from Santa Monica, California, to Jacksonville, Florida, traveling from the Pacific to Atlantic oceans). Additionally, auxiliary highways have their numbering system where a different number prefixes the number of its parent highway.

Five route numbers are duplicated in the system, though the corresponding highways are separated by state lines which prevent confusion. The main list that discusses the primary Interstate Highways in the contiguous United States is followed by sections regarding Alaska, Hawaii, and Puerto Rico.

Contiguous United States

There are 70 primary Interstate Highways listed in the table below.

Number Length (mi)[2] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
46.8 75.3 US 83 in Peñitas, Texas I-69E/US 77/US 83 in Harlingen, Texas 02013-01-012013 current Texas only
Associated routes: none
132.3 212.9 I-275 in Tampa, Florida I-95/SR 400 Daytona Beach, Florida 01959-01-011959 current Florida only
Associated routes: none
1,381.29 2,222.97 Fed. 1 at Mexican border in San Ysidro, California BC 99 at Canadian border in Blaine, Washington 01956-01-011956 current Serves three states: CA, OR, WA
Associated routes: I-105, I-205, I-405, I-505, I-605, I-705, I-805; Future: I-305, I-905
348.25 560.45 Sunset Cliffs Boulevard/Nimitz Boulevard in San Diego, California I-10 in Casa Grande, Arizona 01964-01-011964 current Serves two states: CA, AZ
Associated routes: none
2,460.34 3,959.53 SR 1 in Santa Monica, California I-95/US 17/SR 228 in Jacksonville, Florida 01957-01-011957 current Serves eight states: CA, AZ, NM, TX, LA, MS, AL, FL
Associated routes: I-110, I-210, I-310, I-410, I-510, I-610, I-710, I-910
22.845 36.765 US 93 at Arizona state line I-215/I-515/US 93/US 95/SR 564 in Henderson, Nevada 02017-01-012017 current Nevada only; planned extension north and south
Associated routes: none
85.59 137.74 I-10 in Baton Rouge, Louisiana I-10/I-59 in Slidell, Louisiana 01967-01-011967 current Louisiana only
Associated routes: none
25.1 40.4 US 190/SH 9 in Copperas Cove, Texas I-35 in Belton, Texas 02017-01-262017 current Texas only; planned extension east and west
Associated routes: none
1,433.52 2,307.03 I-8/SR 15 in San Diego, California Hwy. 4 at Canadian border in Sweetgrass, Montana 01957-01-011957 current Serves six states: CA, NV, AZ, UT, ID, MT
Associated routes: I-115, I-215, I-315, I-515
166.81 268.45 I-75 in Macon, Georgia SR 404 and Montgomery Street/Martin Luther King Jr. Boulevard in Savannah, Georgia 01966-01-011966 current Georgia only
Associated route: I-516
145.76 234.58 I-10 in Phoenix, Arizona I-40/SR 89A in Flagstaff, Arizona 01961-01-011961 current Arizona only
Associated routes: none
63.35 101.95 Fed. 15 at Mexican border in Nogales, Arizona I-10 in Tucson, Arizona 01972-01-011972 current Arizona only
Associated routes: none
Uses kilometers instead of miles
1,539.38 2,477.39 I-10 between Kent and Toyah, Texas I-95 in Florence, South Carolina 01957-01-011957 current Serves six states: TX, LA, MS, AL, GA, SC
Associated routes: I-220, I-520, I-820
202.22 325.44 I-269/US 78 near Byhalia, Mississippi I-65/US 31 in Birmingham, Alabama 02012-01-012012 current Serves two states: Mississippi, Alabama
Planned associated routes: I-222, I-422
316.36 509.13 I-57 in Pulley's Mill, Illinois I-75 in Chattanooga, Tennessee 01962-01-011962 current Serves four states: Illinois, Kentucky, Tennessee, Georgia
Associated route: I-124
1,061.67 1,708.59 I-10/US 85/US 180 in Las Cruces, New Mexico I-90/US 87 in Buffalo, Wyoming 01957-01-011957 current Serves three states: New Mexico, Colorado, Wyoming
Associated route: I-225
304.64 490.27 US 11W in Kingsport, Tennessee US 17 in Charleston, South Carolina 01960-01-011960 current Serves three states: Tennessee, North Carolina, South Carolina
Associated routes: I-126, I-526
124.13 199.77 US 87/Loop 289 in Lubbock, Texas I-40/US 87/US 287 in Amarillo, Texas 01969-01-011969 current Texas only
Associated routes: none
755.51 1,215.88 I-35/I-70 in Kansas City, Missouri US 81 and PTH 29 at Canadian border in Pembina, North Dakota 01958-01-011958 current Serves four states: Missouri, Iowa, South Dakota, North Dakota
Associated routes: I-129, I-229
366.76 590.24 I-20 in Fort Worth, Texas I-40/US 65/US 67/US 167 in North Little Rock, Arkansas 01957-01-011957 current Serves two states: Texas, Arkansas
Associated routes: I-430, I-530, I-630
1,568.38 2,524.06 US 83/SH 359/BS I-35 and MX-85 at Mexican border in Laredo, Texas MN 61/LSCT/26th Avenue in Duluth, Minnesota 01956-01-011956 current Serves six states: TX, OK, KS, MO, IA, MN
Associated routes: I-35E, I-35W, I-135, I-235, I-335, I-435, I-535, I-635
143.00 230.14 US 181 in Corpus Christi, Texas I-35/US 281 in San Antonio, Texas 01959-01-011959 current Texas only
Associated routes: none
306.14 492.68 I-55 in Normal, Illinois WIS 29/US 51 in Wausau, Wisconsin 01984-01-011984 current Serves two states: Illinois, Wisconsin
Associated routes: none
2,556.61 4,114.46 I-15 in Barstow, California US 117/NC 132 in Wilmington, North Carolina 01964-01-011964 current Serves eight states: CA, AZ, NM, TX, OK, AR, TN, NC
Associated routes: I-140, I-240, I-440, I-540, I-640, I-840
175 282 I-94/US 41 in Russell, Illinois I-43 in Howard, Wisconsin 02015-01-012015 current Serves two states:
Illinois, Wisconsin
Associated routes: none
191.55 308.27 I-39/I-90 in Beloit, Wisconsin I-41/US 41/US 141 in Howard, Wisconsin 01981-01-011981 current Wisconsin only
Associated routes: none
636.69 1,024.65 US 82/US 277/US 281/US 287 in Wichita Falls, Texas I-70 in St. Louis, Missouri 01958-01-011958 current Serves three states: Texas, Oklahoma, Missouri
Associated routes: I-244, I-444
284.91 458.52 SH 87 in Galveston, Texas I-30/US 67/US 75 in Dallas, Texas 01971-01-011971 current Texas only
Associated route: I-345
528.02 849.77 I-10 in Lafayette, Louisiana I-435 in Kansas City, Missouri 01984-01-011984 current Serves three states: Louisiana, Arkansas, Missouri
Associated routes: none
964.25 1,551.81 I-10 in LaPlace, Louisiana US 41 in Chicago, Illinois 01960-01-011960 current Serves six states: LA, MS, TN, AR, MO, IL
Associated routes: I-155, I-255, I-355; I-555
386.12 621.40 I-55 in Miner, Missouri I-94 in Chicago, Illinois 01965-01-011965 current Serves two states: Missouri, Illinois. Planned in 1 more: Arkansas
Associated routes: none
445.23 716.53 I-10/I-12 in Slidell, Louisiana I-24 in Lookout Mountain, Georgia 01960-01-011960 current Serves four states: Louisiana, Mississippi, Alabama, Georgia
Associated routes: I-359, I-459, I-759
963.52 1,550.64 I-70 in Wentzville, Missouri I-264/I-664 in Chesapeake, Virginia 01961-01-011961 current Serves six states: MO, IL, IN, KY, WV, VA
Associated routes: I-264, I-464, I-564, I-664
887.30 1,427.97 I-10 in Mobile, Alabama I-90, US 12/US 20 in Gary, Indiana 01958-01-011958 current Serves four states: Alabama, Tennessee, Kentucky, Indiana
Associated routes: I-165, I-265, I-465, I-565, I-865
76.28 122.76 I-81 in Front Royal, Virginia US 29 in Washington, D.C. 01961-01-011961 current Serves District of Columbia and one state: Virginia
Associated routes: None, had one proposed auxiliary route, I-266, but was cancelled due to freeway revolts.
113.15 182.10 I-79 in Morgantown, West Virginia I-70 in Hancock, Maryland 01991-01-011991 current Serves two states: West Virginia, Maryland
Associated routes: None
700.78 1,127.80 I-69E/US 77 & I-69W/US 59 in Victoria, Texas (future) Hwy 402 at Canadian border in Port Huron, Michigan 01957-01-011957 current Unfinished Texas section: Rosenberg (US-59/Spur 529) to Splendora (US 59/Mandell Road)
Unfinished Mississippi-Tennessee section: Banks, Mississippi (MS 304/MS 713) to Frayser, Tennessee (US 51/TN 3)
Unfinished Indiana section: Martinsville, Indiana to Indianapolis, Indiana
Serves six states: TX, MS, TN, KY, IN, MI. Planned/started in 2 more: LA, AR
Associated routes: I-69C, I-69E, I-69W, I-169, I-269, I-369, I-469; Planned: I-169 in Tennessee, I-369 in Kentucky
2,150.57 3,461.01 I-15 in Cove Fort, Utah Park and ride in Baltimore, Maryland 01956-01-011956 current Serves 10 states: UT, CO, KS, MO, IL, IN, OH, WV, PA, MD
Associated routes: I-170, I-270, I-370, I-470, I-670
345.57 556.14 I-64 in Louisville, Kentucky I-90 in Cleveland, Ohio 01959-01-011959 current Serves two states: Kentucky, Ohio
Associated routes: I-271, I-471
179.29 288.54 US 61 in Hannibal, Missouri I-57 in Champaign, Illinois 01970-01-011970 current Serves two states: Missouri, Illinois
Associated route: I-172
80.85 130.12 US 220 near Ellerbe, North Carolina I-840/Bryan Boulevard in Greensboro, North Carolina 01997-01-011997 current North Carolina only
Associated routes: none
488.83 786.70 I-80 in Bettendorf, Iowa NC 41 near Lumberton, North Carolina 01974-01-011974 current Serves five states: IA, IL, IN, OH, NC
Associated routes: I-474
1,786.47 2,875.04 SR 826 near Hialeah, Florida Sault Ste. Marie, Michigan (Canada) 01958-01-011958 current Serves six states: FL, GA, TN, KY, OH, MI
Associated routes: I-175, I-275, I-375, I-475, I-575, I-675
186.48 300.11 Denver, Colorado (I-70) Big Springs, Nebraska (I-80) 01975-01-011975 current Serves two states: Colorado, Nebraska
Associated routes: none
435.66 701.13 Westfield Center, Ohio (I-71) Bellmawr, New Jersey (I-295) 01964-01-011964 current Serves three states: Ohio, Pennsylvania, New Jersey
Associated routes: I-176, I-276, I-376, I-476, I-676; Future: I-576
610.10 981.86 Columbia, South Carolina (I-26) Cleveland, Ohio (I-90) 01958-01-011958 current Serves five states: South Carolina, North Carolina, Virginia, West Virginia, Ohio
Associated route: I-277
146.28 235.41 Union Township, Pennsylvania (I-81) Canal Street in New York City 01957-01-011957 current Serves three states: Pennsylvania, New Jersey, New York
Associated routes: I-278, I-478, I-678, I-878
343.46 552.75 Charleston, West Virginia (I-77) Erie, Pennsylvania (PA-5) 01967-01-011967 current Serves two states: West Virginia, Pennsylvania
Associated routes: I-279, I-579
2,899.59 4,666.44 San Francisco, California (US 101) Teaneck, New Jersey (I-95) 01956-01-011956 current Serves 11 states: CA, NV, UT, WY, NE, IA, IL, IN, OH, PA, NJ
Associated routes: I-180, I-238, I-280, I-380, I-480, I-580, I-680, I-780, I-880, I-980
855.02 1,376.02 Dandridge, Tennessee (I-40) Fisher's Landing, New York (Canada) 01961-01-011961 current Serves six states: TN, VA, WV, MD, PA, NY
Associated routes: I-381, I-481, I-581, I-781
143.58 231.07 Ellensburg, Washington (I-90) Hermiston, Oregon (I-84) 01957-01-011957 current Serves two states: Washington, Oregon
Associated route: I-182
85.03 136.84 Baltimore, Maryland Harrisburg, Pennsylvania (I-81) 01959-01-011959 current Serves two states: Maryland, Pennsylvania
Associated route: I-283
769.62 1,238.58 Portland, Oregon (I-5) Echo, Utah (I-80) 01980-01-011980 current Serves three states: Oregon, Idaho, Utah
Associated route: I-184
232.71 374.51 Scranton, Pennsylvania (I-81) Sturbridge, Massachusetts (I-90) 01963-01-011963 current Serves four states: Pennsylvania, New York, Connecticut, Massachusetts
Associated routes: I-384, I-684
666.05 1,071.90 Montgomery, Alabama (I-65) Petersburg, Virginia (I-95) 01958-01-011958 current Serves five states: Alabama, Georgia, South Carolina, North Carolina, Virginia
Associated routes: I-185, I-285, I-385, I-485, I-585, I-785, I-985; Planned: I-685
62.85 101.15 Heyburn, Idaho (I-84) Pocatello, Idaho (I-15) 01980-01-011980 current Idaho only
Associated routes: none
223.39 359.51 Erie, Pennsylvania (I-90) Windsor, New York (NY 79) 01999-01-011999 current Serves two states: Pennsylvania, New York
Associated routes: none
12.9 20.8 Raleigh, North Carolina (I-440/US 64/US 264) Wendell, North Carolina (US 64/US 264) 02017-01-012017 current North Carolina only
Associated routes: None, will eventually have one spur route, I-587.
333.49 536.70 New York City (I-278) Champlain, New York (A-15 at Canadian border) 01957-01-011957 current New York only
Associated routes: I-287, I-587, I-787
140.6 226.3 Barstow, Illinois (I-80) Hillside, Illinois (I-290) 01987-01-011987 current Illinois only
Associated routes: none
117.75 189.50 Binghamton, New York (I-81) Schenectady, New York (I-90) 01968-01-011968 current New York only
Associated routes: none
191.12 307.58 Bow, New Hampshire (I-93) Highgate Springs, Vermont (Route 133 at Canadian border/future A-35) 01960-01-011960 current Serves two states: New Hampshire, Vermont
Associated route: I-189
3,020.44 4,860.93 Seattle, Washington (WA 519) Boston, Massachusetts (MA 1A) 01956-01-011956 current Serves 13 states: WA, ID, MT, WY, SD, MN, WI, IL, IN, OH, PA, NY, MA
Associated routes: I-190, I-290, I-390, I-490, I-590, I-690, I-790, I-890, I-990
290.37 467.31 New Haven, Connecticut/North Haven, Connecticut (I-95) Derby Line, Vermont (A-55 at Canadian border) 01958-01-011958 current Serves three states: Connecticut, Massachusetts, Vermont
Associated routes: I-291, I-391, I-691
189.95 305.69 Canton, Massachusetts (I-95) St. Johnsbury, Vermont (I-91) 01957-01-011957 current Serves three states: Massachusetts, New Hampshire, Vermont
Associated routes: I-293, I-393
1,585.20 2,551.13 I-90 in Billings, Montana Highway 402 at Canadian border in Port Huron, Michigan 01956-01-011956 current Serves seven states: MT, ND, MN, WI, IL, IN, MI
Associated routes: I-194, I-294, I-394, I-494, I-694, I-794, I-894
1,908.48 3,071.40 US 1 in Miami, Florida NB 95 at Canadian border in Houlton, Maine 01957-01-011957 current Serves DC and 15 states: FL, GA, SC, NC, VA, MD, DE, PA, NJ, NY, CT, RI, MA, NH, ME
Associated routes: I-195, I-295, I-395, I-495, I-595, I-695, I-795, I-895
192.06 309.09 Muskegon, Michigan (US 31) Detroit, Michigan (I-75) 01959-01-011959 current Michigan only
Associated routes: I-196, I-296, I-496, I-696
17.62 28.36 Annapolis, Maryland (US 50) Baltimore, Maryland (I-695/I-895) 01987-01-011987 current Maryland only
Associated routes: None, had 2 auxiliary routes planned, I-197 and I-297, but they were replaced by I-595 and MD Route 3.
98.34 158.26 Bedford, Pennsylvania (I-70/I-76) Painted Post, New York (I-86) 01998-01-011998 current Unfinished Pennsylvania section: Bellefonte, Pennsylvania (I-80) to New York border near Lawrenceville, Pennsylvania (US 15)
Serves two states: Pennsylvania, New York
Associated routes: none

Other jurisdictions

In addition to the 48 contiguous states, Interstate Highways are found in Hawaii, Alaska, and Puerto Rico. The Federal Highway Administration funds four routes in Alaska and three routes in Puerto Rico under the same program as the rest of the Interstate Highway System. However, these routes are not required to meet the same standards as the mainland routes:

Hawaii

The Interstate Highways in the island of Oʻahu, Hawaii are signed with the standard Interstate Highway shield, with the letter "H-" prefixed before the number. They are fully controlled-access routes built to the same standards as the mainland Interstate Highways.

Number Length (mi)[2] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
27.16 43.71 Route 93 in Kapolei Route 72 in Honolulu 01959-01-011959 current Associated route: H-201
8.33 13.41 H-1 in Pearl City Route 99 in Wahiawa 01976-01-011976 current
15.32 24.66 H-1 & H-201 in Halawa Marine Corps Base Hawaii 01997-01-011997 current
6.5 10.5 -- -- -- -- Was to have provided relief around the congested areas of H-1, but the idea was not popular and was never built.
  •       Former

Alaska

Map of the Interstates in Alaska

Alaska's Interstate Highways are unsigned as such, although they all have state highway numbers that do not match the Interstate Highway numbers.[4]

Number Length (mi)[2] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
408.23 656.98 Anchorage Canadian border in Alcan Border 01976-01-011976 current Glenn Highway, Richardson Highway, Tok Cut-Off, Alaska Highway[5][6][7][8]
202.18 325.38 Tok Fairbanks 01976-01-011976 current Alaska Highway, Richardson Highway[6][7][8]
148.12 238.38 Anchorage Soldotna 01976-01-011976 current Seward Highway, Sterling Highway[5][7][8]
323.69 520.93 Gateway, Fairbanks 01976-01-011976 current Parks Highway[5][6][7][8]

Puerto Rico

Map of the Interstates in Puerto Rico

Like Alaska, Puerto Rico signs its Interstate Highways as territorial routes, and the numbers do not match their official Interstate Highway designations. Many of the territory's routes are freeway-standard toll roads.[9]

Number Length (mi)[2] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
71.08 114.39 PR-2 in Ponce PR-2 in San Juan 01953-01-011953 current Follows PR-52
138.13 222.30 PR-1 in Ponce PR-3 in San Juan 01953-01-011953 current Follows PR-22
65.27 105.04 PR-3 in Humacao PR-2 in San Juan 01953-01-011953 current Follows PR-66

In popular culture

The title of interactive fiction I-0 refers to the fictional "Interstate Zero".[10]

See also

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 2012.
  2. ^ a b c d Adderley, Kevin (January 30, 2019). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of December 31, 2017". Route Log and Finder List. Federal Highway Administration.
  3. ^ Staff. "FHWA Route Log and Finder List". Federal Highway Administration. Retrieved 2007.
  4. ^ Voss, Oscar. "Alaska Roads: Interstate ends photos". Retrieved 2007.
  5. ^ a b c Witt, Jennifer W. (2010). Annual Traffic Volume Report (PDF) (Report) (2008-2009-2010 ed.). Alaska Department of Transportation & Public Facilities. Archived from the original (PDF) on March 30, 2014. Retrieved 2012.
  6. ^ a b c Birkholz, Ethan (2010). Annual Traffic Volume Report (PDF) (Report) (2008-2009-2010 ed.). Alaska Department of Transportation & Public Facilities. Archived from the original (PDF) on April 17, 2014. Retrieved 2012.
  7. ^ a b c d Staff. "Dwight D. Eisenhower Interstate Routes Statewide" (PDF). Federal Highway Administration. Retrieved 2012.
  8. ^ a b c d Staff. "Alaska Department of Transportation and Public Facilities Routes by Description: CDS Route Numbers as of 28 October 2008" (PDF). Federal Highway Administration. Retrieved 2012.
  9. ^ Voss, Oscar. "Puerto Rico road photos". Retrieved 2007.
  10. ^ "I-0". Interactive Fiction Database. Retrieved 2016.

External links


  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.

List_of_Interstate_Highways
 



 



 
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